Compare Claude Haiku 4.5 and Grok 4.3: Fast Utility vs 1M High-Throughput Scale
Claude Haiku 4.5 vs Grok 4.3: which should I use?
Claude Haiku 4.5 provides ultra-low latency text classification with $0.10/M cache reads, while Grok 4.3 delivers high generation speed across a massive 1M token context window. Verified 2026-09-07.
Verified 2026-09-07
Where can you find price, speed, and task evidence for Claude Haiku 4.5 and Grok 4.3?
Which tasks fit Claude Haiku 4.5 and Grok 4.3?
Best-fit task signals from the published model strengths; this is not a substitute for a controlled benchmark.
| Fact | Claude Haiku 4.5 | Grok 4.3 |
|---|---|---|
| Best fit | Lightweight, high-volume operations like chat, tagging, and moderation. | General-purpose work where speed and a huge context window both matter. |
| Reasoning mode | Unavailable | Available |
What does a Coding Agent workload cost with Claude Haiku 4.5 and Grok 4.3?
Modeled for Coding Agent: 20,000 input + 2,000 output tokens per task, 1 turn. This is a workload model, not a provider quote.
| Fact | Claude Haiku 4.5 | Grok 4.3 |
|---|---|---|
| Coding Agent / task | $0.03 (modeled) | $0.03 (modeled) |
| Input / output rate | $1.00 / $5.00 per M | $1.25 / $2.50 per M |
How fast are Claude Haiku 4.5 and Grok 4.3?
Only non-estimated benchmark results are shown as measured.
| Fact | Claude Haiku 4.5 | Grok 4.3 |
|---|---|---|
| Measured throughput | 148 tokens/s (winner) | 98 tokens/s |
| Time to first token | 260 ms | 320 ms |
How compatible are Claude Haiku 4.5 and Grok 4.3 with APIs?
Provider-level wire-format and SDK facts; model-specific parameter differences may still apply.
| Fact | Claude Haiku 4.5 | Grok 4.3 |
|---|---|---|
| OpenAI SDK | Not drop-in | Usable |
| Request shape | Messages API — system prompt is a top-level field, not a message role, and max_tokens is required on every call. | Full OpenAI chat/completions compatibility — point the openai SDK at api.x.ai and it works unmodified. |
| Streaming | SSE (Anthropic content-block events) | SSE (OpenAI delta) |
What are the privacy and retention policies for Claude Haiku 4.5 and Grok 4.3?
Provider policy and residency facts from the verified provider registry. A missing retention policy is not treated as a guarantee.
| Fact | Claude Haiku 4.5 | Grok 4.3 |
|---|---|---|
| Provider says API data trains models | No | Unavailable |
| Published retention period | Unavailable | Unavailable |
| Data residency | Unavailable | Unavailable |
How much effort does it take to migrate between Claude Haiku 4.5 and Grok 4.3?
Direction is from each displayed model to the other. Effort is derived from provider compatibility and published parameter maps.
| Fact | Claude Haiku 4.5 | Grok 4.3 |
|---|---|---|
| Move Claude Haiku 4.5 → Grok 4.3 | config; 3 breaking parameter differences | Target: Grok 4.3 |
| Move Grok 4.3 → Claude Haiku 4.5 | Source: Grok 4.3 | code-change; 8 breaking parameter differences |
| Why | Keep the `openai` SDK; change `baseURL` and the API key. | Messages API — system prompt is a top-level field, not a message role, and max_tokens is required on every call. |
Exact-pair decision guide. Verified 2026-09-02. The three sections below are computed from dated scenarios; assumptions and unavailable joins are not observations.
Exact pair boundary: Anthropic / xAI; transcript/system/tool hashes, identity and consent state, exact endpoint, policy version, side-effect state, and queue checkpoint must join. Requested models are claude-haiku-4-5 and grok-4.3. Provider, rate, pricing, and task pages remain fact owners.
Support-session state equivalence register
Frozen scenario board. Formula / deterministic rule: equivalent = transcript/system/tool-state hashes + identity/consent + exact endpoint/settings; portable state gap => conditional or blocked Boundary: Owns exact-pair support-session state, not hidden provider session behavior or a chatbot leaderboard.
| Frozen scenario | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
| new inquiry | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=new inquiry; transcript/system/tool hashes; exact IDs/hosts/settings; identity/consent state; portable/non-portable fields; equivalent/conditional/blocked decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — new inquiry is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| authenticated follow-up | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=authenticated follow-up; transcript/system/tool hashes; exact IDs/hosts/settings; identity/consent state; portable/non-portable fields; equivalent/conditional/blocked decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — authenticated follow-up is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| attachment turn | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=attachment turn; transcript/system/tool hashes; exact IDs/hosts/settings; identity/consent state; portable/non-portable fields; equivalent/conditional/blocked decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — attachment turn is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| tool-result continuation | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=tool-result continuation; transcript/system/tool hashes; exact IDs/hosts/settings; identity/consent state; portable/non-portable fields; equivalent/conditional/blocked decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — tool-result continuation is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| agent handoff | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=agent handoff; transcript/system/tool hashes; exact IDs/hosts/settings; identity/consent state; portable/non-portable fields; equivalent/conditional/blocked decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — agent handoff is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| expired session | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=expired session; transcript/system/tool hashes; exact IDs/hosts/settings; identity/consent state; portable/non-portable fields; equivalent/conditional/blocked decision; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — expired session has no matched, dated bilateral observation. | FAIL CLOSED — manual, probe, or source evidence required |
First-party provenance: Anthropic Messages API; verification date 2026-09-02. Missing or conflicting joins fail closed.
Support-policy transition evidence receipt
Frozen scenario board. Formula / deterministic rule: transition_valid = policy/schema validator pass + expected state transition + settled side effect / matched fixtures; missing evidence => Untested Boundary: Owns policy-transition receipts for Haiku versus Grok 4.3; it does not infer general safety.
| Frozen scenario | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
| FAQ answer | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=FAQ answer; fixture/policy/prompt/result hashes; exact routes; validator versions; state transition/side effects; accepted/rejected/Untested result; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — FAQ answer is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| refund boundary | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=refund boundary; fixture/policy/prompt/result hashes; exact routes; validator versions; state transition/side effects; accepted/rejected/Untested result; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — refund boundary is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| account-data request | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=account-data request; fixture/policy/prompt/result hashes; exact routes; validator versions; state transition/side effects; accepted/rejected/Untested result; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — account-data request is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| angry-customer escalation | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=angry-customer escalation; fixture/policy/prompt/result hashes; exact routes; validator versions; state transition/side effects; accepted/rejected/Untested result; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — angry-customer escalation is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| read-only tool use | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=read-only tool use; fixture/policy/prompt/result hashes; exact routes; validator versions; state transition/side effects; accepted/rejected/Untested result; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — read-only tool use is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| write-tool confirmation | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=write-tool confirmation; fixture/policy/prompt/result hashes; exact routes; validator versions; state transition/side effects; accepted/rejected/Untested result; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — write-tool confirmation is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
First-party provenance: xAI model documentation; verification date 2026-09-02. Missing or conflicting joins fail closed.
Surge and incident containment board
Frozen scenario board. Formula / deterministic rule: contain = checkpoint + idempotency + timeout/priority rule + human/quarantine path; unresolved write replay => block Boundary: Owns support surge, incident, and takeover containment for this pair only.
| Frozen scenario | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
| normal load | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=normal load; observed versus assumed queue inputs; checkpoint; idempotency; priority/timeout; model/human/quarantine outcome; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — normal load is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| arrival spike | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=arrival spike; observed versus assumed queue inputs; checkpoint; idempotency; priority/timeout; model/human/quarantine outcome; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — arrival spike is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| slow tool dependency | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=slow tool dependency; observed versus assumed queue inputs; checkpoint; idempotency; priority/timeout; model/human/quarantine outcome; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — slow tool dependency is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| partial outage | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=partial outage; observed versus assumed queue inputs; checkpoint; idempotency; priority/timeout; model/human/quarantine outcome; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — partial outage is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| duplicate-write risk | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=duplicate-write risk; observed versus assumed queue inputs; checkpoint; idempotency; priority/timeout; model/human/quarantine outcome; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — duplicate-write risk is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| human-queue saturation | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=human-queue saturation; observed versus assumed queue inputs; checkpoint; idempotency; priority/timeout; model/human/quarantine outcome; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-02; measurement versus assumption=explicit | Unavailable — human-queue saturation is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
First-party provenance: Anthropic API rate limits; verification date 2026-09-02. Missing or conflicting joins fail closed.
Method and limitations: formulas are deterministic; observed and assumed inputs are labeled; no missing provider, host, account, region, realm, alias, snapshot, revision, weight, artifact, control, tool, modality, workload, rate-period, timestamp, or result is transferred. Run this scenario →
Exact-pair decision guide · verified 2026-09-07
Exact pair boundary: Anthropic / xAI; model endpoint, sub-second speed vs 1M context high-throughput, and token pricing must join. Requested models are claude-haiku-4-5 and grok-4.3. Provider, rate, pricing, and task pages remain fact owners.
Sub-second latency SLA and user turnaround audit
Frozen scenario board. Formula / deterministic rule: turnaround = ttft + (tokens_out / tps); Haiku speed vs Grok streaming throughput Boundary: Owns latency compliance and SLA auditing.
| Frozen scenario | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
| real-time chat autocomplete (<200ms) | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=real-time chat autocomplete (<200ms); task; response SLA; Haiku latency; Grok 4.3 latency; SLA compliance; responsiveness champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — real-time chat autocomplete (<200ms) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| customer support routing (<500ms) | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=customer support routing (<500ms); task; response SLA; Haiku latency; Grok 4.3 latency; SLA compliance; responsiveness champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — customer support routing (<500ms) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| document extraction (batch acceptable) | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=document extraction (batch acceptable); task; response SLA; Haiku latency; Grok 4.3 latency; SLA compliance; responsiveness champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — document extraction (batch acceptable) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| streaming generation (16 tps baseline) | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=streaming generation (16 tps baseline); task; response SLA; Haiku latency; Grok 4.3 latency; SLA compliance; responsiveness champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — streaming generation (16 tps baseline) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| concurrency contention latency spike | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=concurrency contention latency spike; task; response SLA; Haiku latency; Grok 4.3 latency; SLA compliance; responsiveness champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — concurrency contention latency spike is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| unmeasured speed fixture | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=unmeasured speed fixture; task; response SLA; Haiku latency; Grok 4.3 latency; SLA compliance; responsiveness champion; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unmeasured speed fixture is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
First-party provenance: All AI Ask measured speed dataset; verification date 2026-09-07. Missing or conflicting joins fail closed.
Prompt caching economics and high-volume classification
Frozen scenario board. Formula / deterministic rule: cost = (uncached_in * in_rate + cached_in * cache_rate + out * out_rate) / 1M Boundary: Owns prompt caching savings vs raw token generation costs.
| Frozen scenario | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
| 10K classification calls (no cache) | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=10K classification calls (no cache); query volume; prompt tokens; completion tokens; Haiku spend; Grok 4.3 spend; budget delta; cost winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 10K classification calls (no cache) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| 100K calls with 50% prompt caching | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=100K calls with 50% prompt caching; query volume; prompt tokens; completion tokens; Haiku spend; Grok 4.3 spend; budget delta; cost winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 100K calls with 50% prompt caching is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| 500K calls with 80% prefix cache | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=500K calls with 80% prefix cache; query volume; prompt tokens; completion tokens; Haiku spend; Grok 4.3 spend; budget delta; cost winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 500K calls with 80% prefix cache is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| 1M high-volume customer queries | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=1M high-volume customer queries; query volume; prompt tokens; completion tokens; Haiku spend; Grok 4.3 spend; budget delta; cost winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 1M high-volume customer queries is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| batch API processing (50% discount) | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=batch API processing (50% discount); query volume; prompt tokens; completion tokens; Haiku spend; Grok 4.3 spend; budget delta; cost winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — batch API processing (50% discount) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| unresolved tariff schedule | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=unresolved tariff schedule; query volume; prompt tokens; completion tokens; Haiku spend; Grok 4.3 spend; budget delta; cost winner; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unresolved tariff schedule has no matched, dated bilateral observation. | FAIL CLOSED — manual, probe, or source evidence required |
First-party provenance: Anthropic API pricing; verification date 2026-09-07. Missing or conflicting joins fail closed.
Context window saturation (200K vs 1M) capability gate
Frozen scenario board. Formula / deterministic rule: eligible = (context <= 200K ? Both : (context <= 1M ? Grok : Excluded)) Boundary: Owns context window scaling and codebase ingestion boundaries.
| Frozen scenario | Pair, identity, host, surface, and evidence fields | Result | State |
|---|---|---|---|
| short prompt (5K tokens) | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=short prompt (5K tokens); context size; Haiku eligible; Grok 4.3 eligible; Haiku cost; Grok cost; context gating verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — short prompt (5K tokens) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| medium document (50K tokens) | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=medium document (50K tokens); context size; Haiku eligible; Grok 4.3 eligible; Haiku cost; Grok cost; context gating verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — medium document (50K tokens) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| large legal packet (200K boundary) | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=large legal packet (200K boundary); context size; Haiku eligible; Grok 4.3 eligible; Haiku cost; Grok cost; context gating verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — large legal packet (200K boundary) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| repository dump (500K tokens) | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=repository dump (500K tokens); context size; Haiku eligible; Grok 4.3 eligible; Haiku cost; Grok cost; context gating verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — repository dump (500K tokens) is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| 1M full context saturation | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=1M full context saturation; context size; Haiku eligible; Grok 4.3 eligible; Haiku cost; Grok cost; context gating verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — 1M full context saturation is a frozen fixture pending exact identity, configuration, and denominator joins. | UNTESTED — assumption cannot establish a verdict |
| unsupported payload encoding | pair=claude-haiku-4-5 vs grok-4.3; provider=Anthropic / xAI; hostA=api.anthropic.com; hostB=api.x.ai; surfaceA=Anthropic Messages API; surfaceB=xAI API; requested/effective IDs=claude-haiku-4-5,grok-4.3; scenario=unsupported payload encoding; context size; Haiku eligible; Grok 4.3 eligible; Haiku cost; Grok cost; context gating verdict; prompt/config/input/output/result/cache/checkpoint/artifact hashes=required; evidence=2026-09-07; measurement versus assumption=explicit | Unavailable — unsupported payload encoding has no matched, dated bilateral observation. | FAIL CLOSED — manual, probe, or source evidence required |
First-party provenance: xAI Grok documentation; verification date 2026-09-07. Missing or conflicting joins fail closed.
Method and limitations: formulas are deterministic; observed and assumed inputs are labeled; no missing provider, host, account, region, realm, alias, snapshot, revision, weight, artifact, control, tool, modality, workload, rate-period, timestamp, or result is transferred. Run this scenario →
How do Claude Haiku 4.5 and Grok 4.3 compare on specs?
| Claude Haiku 4.5 | Grok 4.3 | |
|---|---|---|
| Price (input) | $1.00/M ✓ | $1.25/M |
| Price (output) | $5.00/M | $2.50/M ✓ |
| Blended price | $2.00/M | $1.56/M ✓ |
| Context window | 200,000 tokens | 1,000,000 tokens ✓ |
| Max output | 32,000 tokens | 64,000 tokens ✓ |
| Modalities | text, vision | text, vision |
| Reasoning mode | No | Yes |
| Released | 2025-11 | 2026-06 |
| Speed | 148 t/s ✓ | 98 t/s |
How much do Claude Haiku 4.5 and Grok 4.3 cost at scale?
| Tokens / month | Claude Haiku 4.5 | Grok 4.3 | Delta |
|---|---|---|---|
| 1,000,000 | $2.00 | $1.56 | $0.44 (1.3×) |
| 10,000,000 | $20.00 | $15.63 | $4.38 (1.3×) |
| 100,000,000 | $200.00 | $156.25 | $43.75 (1.3×) |
Choose Claude Haiku 4.5 if…
- ✓Fastest Claude model
- ✓Lowest Claude pricing
- ✓Vision input included
- ✓Lightweight, high-volume operations like chat, tagging, and moderation.
Choose Grok 4.3 if…
- ✓xAI’s general-purpose flagship
- ✓Extremely fast for its size
- ✓1M-token context
- ✓General-purpose work where speed and a huge context window both matter.
Run this exact matchup right now
Send the same prompt to Claude Haiku 4.5 and Grok 4.3 side by side and see the outputs yourself.
Try Claude Haiku 4.5 vs Grok 4.3 FreeWhat are common questions about Claude Haiku 4.5 and Grok 4.3?
Is Claude Haiku 4.5 cheaper than Grok 4.3?
Grok 4.3 is cheaper, at $1.56 per million blended tokens vs $2.00 for Claude Haiku 4.5.
Which has the bigger context window, Claude Haiku 4.5 or Grok 4.3?
Grok 4.3 has the larger context window: 1,000,000 tokens vs 200,000.
Can Claude Haiku 4.5 replace Grok 4.3 for coding?
Both are viable for coding. Fastest Claude model (Claude Haiku 4.5) vs xAI’s general-purpose flagship (Grok 4.3) — pick based on which strength matters more for your workload.
Which is faster, Claude Haiku 4.5 or Grok 4.3?
Claude Haiku 4.5 is faster: 148 t/s vs 98 t/s, measured on our speed benchmarks.
Neither of these? See Grok 4.3 alternatives.
What related comparisons help choose between Claude Haiku 4.5 and Grok 4.3?
Claude Haiku 4.5 pricingGrok 4.3 pricingvs DeepSeek V4 Provs Gemini 3.1 Provs Claude Sonnet 4.6vs Grok-3Premium model tests
Pricing verified 2026-04-06. Specs verified 2026-08-14.