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ModelActiveClosed / proprietaryIdentity probable

Claude Haiku 4.5

Anthropicfamily · Claude 4.5platform.claude.com/docs/en/models/haiku-4-5/ove

The fastest model with near-frontier intelligence

Open in Graph
data quality79

Updated 5 d ago · first seen 11 Sept 2026

model_01M293V7EVJNMFK5XYXPECHGYF

Overview

Identity

Canonical model
Yesidentity confidence: mediumOne row per real model release. Artifacts (checkpoints, quantisations, conversions) and folded evaluation variants point here.
Official checkpoints
None recorded — closed weightsofficial_checkpoints = hf_repo identifiers carried by the model itself; artifacts are separate entities pointing here through canonical_id.
Artifacts
None recordedSeparate entities (checkpoint · quantization · conversion · packaging) pointing to this model through canonical_id.
Provider deployments
2
API aliases
anthropic/claude-haiku-4.5claude-4-5-haikuclaude-4-5-haiku-reasoningclaude-haiku-4-5-20251001Identifiers under which providers and evaluators refer to this model.
Folded evaluation variants
1Effort / thinking variants (…-high, …-non-reasoning) are result configurations of this model, not separate models. Their old URLs redirect here.

Openness

Closed / proprietary— weights not available; 7 dimensions unknown.

Weights are not available; the model is reachable only through an API or a product.

  • Weights

    No

  • Inference code

    —

  • Training code

    —

  • Training data

    —

  • Dataset

    —

  • Commercial use

    —

  • Redistribution

    —

  • Derivatives

    —

dimensions marked null are unknown, not false

Key facts

Release date

Source:Claude Developer Platform docsT1observed 5 d agohigh

Status

Source:Claude Developer Platform docsT1observed 5 d agohigh

Knowledge cutoff

Source:Claude Developer Platform docsT1observed 5 d agohigh

Retirement date

Source:Claude Developer Platform docsT1observed 5 d agohigh

Official page
platform.claude.com/docs/en/models/haiku-4-5/overview

Source:Claude Developer Platform docsT1observed 5 d agohigh

API model id

Source:Claude Developer Platform docsT1observed 5 d agohigh

Openrouter id

Source:OpenRouter public model & pricing listingT2observed 5 d agomedium

Architecture

Tokenizer

Source:OpenRouter public model & pricing listingT2observed 5 d agomedium

Training data cutoff

Source:Claude Developer Platform docsT1observed 5 d agohigh

Capabilities

Modalities

Modalities
textimage
Input
textimage
Output
text

Capabilities

  • Tool calling

    Yes

    Claude Developer Platform docs · T1

  • Structured output

    Yes

    OpenRouter public model & pricing listing · T2

  • Reasoning

    Yes

    OpenRouter public model & pricing listing · T2

  • Vision

    Yes

    Claude Developer Platform docs · T1

  • Audio

    Unavailable

  • Fine-tuning available

    Unavailable

Context window

Source:Claude Developer Platform docsT1observed 5 d agohigh

Max output

Source:Claude Developer Platform docsT1observed 5 d agohigh

Knowledge cutoff

Source:Claude Developer Platform docsT1observed 5 d agohigh

Tokenizer

Source:OpenRouter public model & pricing listingT2observed 5 d agomedium

Benchmarks34

Compare with another model →

Comparable same task and conditions · Partially comparable same task, conditions differ (effort, temperature, judge) · Not comparable different variant or metric

Benchmark results grouped by comparability group
Benchmark · groupBest scoreTrustConfigurationResultsvs leaderEvaluatedSource
Terminal-Benchagentic · accuracy · variant=hard · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysisvarianthardreasoningoffconditions differ across rows → partially comparable4−38.6 ptvs gpt-5.6-solobs. 16 Sept 2026artificialanalysis.aiT2
Terminal-Benchagentic · accuracy · variant=v4.0 · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysisvariantv4.0reasoningonconditions differ across rows → partially comparable2non-primary groupobs. 15 Sept 2026artificialanalysis.aiT2
Terminal-Benchagentic · accuracy · variant=v2.1 · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysisvariantv2.1reasoningonconditions differ across rows → partially comparable2non-primary groupobs. 15 Sept 2026artificialanalysis.aiT2
τ²-benchagentic · pass^1 · variant=Telecom · evaluator=Artificial AnalysisIndependentevaluatorArtificial AnalysisvariantTelecomreasoningonconditions differ across rows → partially comparable2non-primary groupobs. 16 Sept 2026artificialanalysis.aiT2
τ²-benchagentic · pass^1 · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysisreasoningonconditions differ across rows → partially comparable2−44.4 ptvs Z.ai GLM 5.2obs. 11 Sept 2026artificialanalysis.aiT2
SciCodecoding · accuracy · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysisreasoningonconditions differ across rows → partially comparable2−20.8 ptvs Claude Fable 5.1obs. 16 Sept 2026artificialanalysis.aiT2
Artificial Analysis Intelligence Indexcomposite · indexIndependentreasoningonversion4.3conditions differ across rows → partially comparable4−35.8vs Claude Fable 5.1obs. 16 Sept 2026artificialanalysis.aiT2
IFBenchinstruction-following · accuracy · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysisreasoningonconditions differ across rows → partially comparable4−29.0 ptvs Grok 4.3obs. 16 Sept 2026artificialanalysis.aiT2
Humanity's Last Examknowledge · accuracy · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysisreasoningonconditions differ across rows → partially comparable4−48.8 ptvs Claude Fable 5.1obs. 16 Sept 2026artificialanalysis.aiT2
MMMU-Promultimodal · accuracy · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysisreasoningonconditions differ across rows → partially comparable4−28.3 ptvs gpt-6-astraobs. 16 Sept 2026artificialanalysis.aiT2
GPQA Diamondreasoning · accuracy · variant=Diamond · evaluator=Artificial AnalysisIndependentevaluatorArtificial AnalysisvariantDiamondreasoningonconditions differ across rows → partially comparable2non-primary groupobs. 16 Sept 2026artificialanalysis.aiT2
GPQA Diamondreasoning · accuracy · variant=GPQA Diamond · evaluator=Artificial AnalysisIndependentevaluatorArtificial AnalysisvariantGPQA Diamondreasoningonconditions differ across rows → partially comparable2−29.1 ptvs gpt-6-astraobs. 11 Sept 2026artificialanalysis.aiT2

Current rows only, grouped by benchmark → canonical metric → comparability group (task configuration). Effort variants folded into this model appear as rows of the same group. 34 current rows in total. “vs leader” compares with the current leader of the benchmark's primary group only; other groups are not directly comparable. Comparability rules →

Providers & Pricing5

All offers in the price terminal →
Provider deployments, cheapest output first
ProviderContextInput / 1MCached inCache writeOutput / 1MNative unitsStatusObservedSource
Anthropic APIcheapest outputanthropic/claude-haiku-4.5:batch200Kout 64K$0.05$0.625—active5 d agosince 11 Sept 2026openrouter.aiT2
OpenRouteranthropic/claude-haiku-4.5:batch200Kout 64K$0.05$0.625—active26 min agosince 12 Sept 2026openrouter.aiT2
Anthropic API—$0.10$1.25cache_write_1h_per_mtok=2active5 d agosince 11 Sept 2026platform.claude.comT1
Anthropic APIanthropic/claude-haiku-4.5200Kout 64K$0.10$1.25—active5 d agosince 11 Sept 2026openrouter.aiT2
OpenRouteranthropic/claude-haiku-4.5200Kout 64K$0.10$1.25—active26 min agosince 12 Sept 2026openrouter.aiT2

USD per 1M tokens as published by each provider; native units (per-request fees, flex/priority tiers) are kept verbatim. Rows are append-only — every price change is kept in the history below. Cost of a workload →

Price history

Step lines per provider; amber markers are recorded changes. Click a marker or a row for the evidence behind that price.

Output price · USD / 1M tokens 2 providers

Output price history of Claude Haiku 4.5$0$2$4$6Sept 26Sept 26Sept 26Sept 26Sept 26Anthropic API: first observed → $5 · 11 Sept 2026Anthropic API: $5 → $2.5 · 11 Sept 2026OpenRouter: first observed → $5 · 12 Sept 2026OpenRouter: $5 → $2.5 · 12 Sept 2026
  • Anthropic API
  • OpenRouter
  • OpenRouter$5 → $2.512 Sept 2026
  • OpenRouterfirst observed $512 Sept 2026
  • Anthropic API$5 → $2.511 Sept 2026
  • Anthropic APIfirst observed $511 Sept 2026

Input price · USD / 1M tokens 2 providers

Input price history of Claude Haiku 4.5$0$0.20$0.40$0.60$0.80$1$1.2Sept 26Sept 26Sept 26Sept 26Sept 26Anthropic API: first observed → $1 · 11 Sept 2026Anthropic API: $1 → $0.50 · 11 Sept 2026OpenRouter: first observed → $1 · 12 Sept 2026OpenRouter: $1 → $0.50 · 12 Sept 2026
  • Anthropic API
  • OpenRouter
  • OpenRouter$1 → $0.5012 Sept 2026
  • OpenRouterfirst observed $112 Sept 2026
  • Anthropic API$1 → $0.5011 Sept 2026
  • Anthropic APIfirst observed $111 Sept 2026

Versions & Artifacts0

Version history

Context windowfirst observation only

11 Sept 2026current

Knowledge cutofffirst observation only

11 Sept 2026current

Max outputfirst observation only

11 Sept 2026current

Opennessfirst observation only

11 Sept 2026current

Statusfirst observation only

11 Sept 2026current

Each hop is a claim: click a value for its source, tier and observation time. Nothing is overwritten — a new observation closes the previous claim.

Artifacts 0

No artifact (checkpoint, quantisation, conversion or packaging) points to this model yet.

Timeline20

Full timeline →

Change history

Temporal, append-only claims: a new observation closes the previous claim instead of overwriting it. Rewind the record with the as-of picker.
1 claims · 1 propertiesShow all properties

Weights availableweights_available1

Claim history for Weights available
ValueValid from → toStatusSourceConfidenceExtractor
No → currentcurrentAI Atlas curated registry (YAML, versioned in git, every entry carries its source URL)T2highderived

Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →

Provenance

Attributed facts

37

Source tiers

T1T226 / 11

Freshest observation

5 d ago

Conflicts

10 flagged

Source documents 5

Source documents
SourceDocumentTypeTierLast observedSnapshots
Claude Developer Platform docsdocs.claude.com/en/docs/about-claude/models/overview.md model_docsT1· Official18 h ago1
Claude Developer Platform docsdocs.claude.com/en/docs/about-claude/pricing.md pricingT1· Official18 h ago1
Claude Developer Platform docsplatform.claude.com/docs/en/models/haiku-4-5/overview.md model_pageT1· Official5 d ago1
Artificial Analysisartificialanalysis.ai/leaderboards/models leaderboardT2· Quality secondary21 min ago18
OpenRouter public model & pricing listingopenrouter.ai/api/v1/models catalogueT2· Quality secondary26 min ago76

Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.

Data quality (79/100) measures how well AI Atlas knows this entity — completeness, primary-source ratio, freshness, conflicts — never how good the model is. Methodology →