Skip to content
AI Atlas
ModelActiveClosed / proprietary

Claude Sonnet 5

Anthropicfamily · Claudeplatform.claude.com/docs/en/models/sonnet-5/over

The best combination of speed and intelligence

Open in Graph
data quality79

Updated 2 h ago · first seen 11 Sept 2026

model_01M293V7ES8JKCRB1K464Y88H6

Overview

Identity

Canonical model
Yesidentity confidence: highOne 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
1
API aliases
anthropic/claude-sonnet-5claude-sonnet-5claude-sonnet-5-highclaude-sonnet-5-lowclaude-sonnet-5-mediumclaude-sonnet-5-non-reasoningclaude-sonnet-5-xhighIdentifiers under which providers and evaluators refer to this model.
Folded evaluation variants
6Effort / 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 12 h agohigh

Status

Source:Claude Developer Platform docsT1observed 12 h agohigh

Knowledge cutoff

Source:Claude Developer Platform docsT1observed 12 h agohigh

Retirement date

Source:Claude Developer Platform docsT1observed 12 h agohigh

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

Source:Claude Developer Platform docsT1observed 12 h agohigh

API model id

Source:Claude Developer Platform docsT1observed 12 h agohigh

Openrouter id

Source:OpenRouter public model & pricing listingT2observed 12 h agomedium

Architecture

Tokenizer

Source:OpenRouter public model & pricing listingT2observed 12 h agomedium

Training data cutoff

Source:Claude Developer Platform docsT1observed 12 h 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 12 h agohigh

Max output

Source:Claude Developer Platform docsT1observed 12 h agohigh

Knowledge cutoff

Source:Claude Developer Platform docsT1observed 12 h agohigh

Tokenizer

Source:OpenRouter public model & pricing listingT2observed 12 h agomedium

Benchmarks36

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=v2.1 · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysisvariantv2.12non-primary groupobs. 11 Sept 2026artificialanalysis.aiT2
Terminal-Benchagentic · accuracy · variant=v4.0 · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysisvariantv4.05non-primary groupobs. 11 Sept 2026artificialanalysis.aiT2
LiveBench Agentic Codingcoding · average score · variant=Agentic CodingOfficial boardvariantAgentic Codingreasoning_effortxhighrelease2026-06-25conditions differ across rows → partially comparable1−17.9 ptvs DeepSeek-V4.1-Flash25 Jun 2026livebench.aiT2
LiveBench Codingcoding · average score · variant=CodingOfficial boardvariantCodingreasoning_effortxhighrelease2026-06-25conditions differ across rows → partially comparable1−5.69 ptvs Claude Fable 5.125 Jun 2026livebench.aiT2
SciCodecoding · accuracy · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysis5−8.80 ptvs Claude Fable 5.1obs. 11 Sept 2026artificialanalysis.aiT2
Artificial Analysis Intelligence Indexcomposite · indexIndependentversion4.36−15.0vs Claude Fable 5.1obs. 11 Sept 2026artificialanalysis.aiT2
LiveBenchgeneral · global_averageOfficial boardreasoning_effortxhighrelease2026-06-25conditions differ across rows → partially comparable1−7.37 ptvs Claude Fable 5.125 Jun 2026livebench.aiT2
LiveBench Data Analysisgeneral · average score · variant=Data AnalysisOfficial boardvariantData Analysisreasoning_effortxhighrelease2026-06-25conditions differ across rows → partially comparable1−11.2 ptvs gpt-6-astra25 Jun 2026livebench.aiT2
LiveBench Languagegeneral · average score · variant=LanguageOfficial boardvariantLanguagereasoning_effortxhighrelease2026-06-25conditions differ across rows → partially comparable1−15.7 ptvs Claude Fable 525 Jun 2026livebench.aiT2
LiveBench Instruction Followinginstruction-following · average score · variant=IFOfficial boardvariantIFreasoning_effortxhighrelease2026-06-25conditions differ across rows → partially comparable1−17.6 ptvs Gemini 3.8 Flash25 Jun 2026livebench.aiT2
Humanity's Last Examknowledge · accuracy · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysis6−17.8 ptvs Claude Fable 5.1obs. 11 Sept 2026artificialanalysis.aiT2
LiveBench Mathematicsmath · average score · variant=MathematicsOfficial boardvariantMathematicsreasoning_effortxhighrelease2026-06-25conditions differ across rows → partially comparable1−4.07 ptvs Claude Fable 5.125 Jun 2026livebench.aiT2
MMMU-Promultimodal · accuracy · evaluator=Artificial AnalysisIndependentevaluatorArtificial Analysis2−9.60 ptvs gpt-6-astraobs. 11 Sept 2026artificialanalysis.aiT2
GPQA Diamondreasoning · accuracy · variant=GPQA Diamond · evaluator=Artificial AnalysisIndependentevaluatorArtificial AnalysisvariantGPQA Diamond2−5.15 ptvs gpt-6-astraobs. 11 Sept 2026artificialanalysis.aiT2
LiveBench Reasoningreasoning · average score · variant=ReasoningOfficial boardvariantReasoningreasoning_effortxhighrelease2026-06-25conditions differ across rows → partially comparable1−3.96 ptvs gpt-6-astra25 Jun 2026livebench.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. 36 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 & Pricing3

All offers in the price terminal →
Provider deployments, cheapest output first
ProviderContextInput / 1MCached inCache writeOutput / 1MNative unitsStatusObservedSource
Anthropic APIcheapest outputanthropic/claude-sonnet-5:batch1Mout 128K$0.10$1.25—active3 h agosince 11 Sept 2026openrouter.aiT2
Anthropic API—$0.20$2.5cache_write_1h_per_mtok=4active12 h agosince 11 Sept 2026platform.claude.comT1
Anthropic APIanthropic/claude-sonnet-51Mout 128K$0.20$2.5—active3 h agosince 11 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 1 provider

Output price history of Claude Sonnet 5$0$2$4$6$8$10$12Sept 26Sept 26Sept 26Anthropic API: first observed → $10 · 11 Sept 2026Anthropic API: $10 → $5 · 11 Sept 2026
  • Anthropic API
  • Anthropic API$10 → $511 Sept 2026
  • Anthropic APIfirst observed $1011 Sept 2026

Input price · USD / 1M tokens 1 provider

Input price history of Claude Sonnet 5$0$0.50$1$1.5$2$2.5Sept 26Sept 26Sept 26Anthropic API: first observed → $2 · 11 Sept 2026Anthropic API: $2 → $1 · 11 Sept 2026
  • Anthropic API
  • Anthropic API$2 → $111 Sept 2026
  • Anthropic APIfirst observed $211 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.

Change history36

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

Viewing AI Atlas as of 12 Sept 2026 — attributes exactly as the atlas knew them on that day; later corrections are not shown.

Back to today →

Attributes as of 12 Sept 2026 37 claims in force

Family
Claude
Release date
30 Jun 2026
Status
active
Openness
proprietary
Context window
1M tokens
Max output
128K tokens
Knowledge cutoff
Jan 2026
Training data cutoff
Jan 2026
Modalities
text, image
Input modalities
text, image
Output modalities
text
Tokenizer
Claude
API model id
claude-sonnet-5
API alias
claude-sonnet-5
Retirement date
30 Jun 2027
Retirement tentative
Yes
Aa context window
1,000,000
Aa openness
proprietary
Bedrock model id
anthropic.claude-sonnet-5
Claude aws model id
claude-sonnet-5
Default effort
high
File input
Yes
Foundry model id
claude-sonnet-5
Latency tier
Fast
Aa median output tokens per second
74.2
Openrouter id
anthropic/claude-sonnet-5
Openrouter listed at
30 Jun 2026
Reasoning
Yes
Structured output
Yes
Supported parameters
include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, stop, structured_outputs, tool_choice, tools, verbosity
Thinking
Adaptive
Tool calling
Yes
Vertex model id
claude-sonnet-5
Vision
Yes
Weights available
No
36 claims · 32 properties4 conflicting

Familyfamily1

Claim history for Family
ValueValid from → toStatusSourceConfidenceExtractor
Claude → currentcurrentClaude Developer Platform docsT1highdeterministic

Release daterelease_date1

Claim history for Release date
ValueValid from → toStatusSourceConfidenceExtractor
30 Jun 2026 → currentcurrentClaude Developer Platform docsT1highdeterministic

Statusstatus1

Claim history for Status
ValueValid from → toStatusSourceConfidenceExtractor
active → currentcurrentClaude Developer Platform docsT1highdeterministic

Opennessopenness1

Claim history for Openness
ValueValid from → toStatusSourceConfidenceExtractor
proprietary → currentcurrentClaude Developer Platform docsT1highdeterministic

Context windowcontext_length1

Claim history for Context window
ValueValid from → toStatusSourceConfidenceExtractor
1M tokens → currentcurrentClaude Developer Platform docsT1highdeterministic

Max outputmax_output_tokens1

Claim history for Max output
ValueValid from → toStatusSourceConfidenceExtractor
128K tokens → currentcurrentClaude Developer Platform docsT1highdeterministic

Knowledge cutoffknowledge_cutoff1

Claim history for Knowledge cutoff
ValueValid from → toStatusSourceConfidenceExtractor
Jan 2026 → currentcurrentClaude Developer Platform docsT1highdeterministic

Training data cutofftraining_data_cutoff1

Claim history for Training data cutoff
ValueValid from → toStatusSourceConfidenceExtractor
Jan 2026 → currentcurrentClaude Developer Platform docsT1highdeterministic

Modalitiesmodalities3conflicting claims

Claim history for Modalities
ValueValid from → toStatusSourceConfidenceExtractor
image, text → currentconflictingOpenRouter public model & pricing listingT2mediumdeterministic
image, text → currentconflictingOpenRouter public model & pricing listingT2mediumdeterministic
text, image → currentcurrentClaude Developer Platform docsT1conflicteddeterministic

Input modalitiesmodalities_input3conflicting claims

Claim history for Input modalities
ValueValid from → toStatusSourceConfidenceExtractor
image, text → currentconflictingOpenRouter public model & pricing listingT2mediumdeterministic
image, text → currentconflictingOpenRouter public model & pricing listingT2mediumdeterministic
text, image → currentcurrentClaude Developer Platform docsT1conflicteddeterministic

Output modalitiesmodalities_output1

Claim history for Output modalities
ValueValid from → toStatusSourceConfidenceExtractor
text → currentcurrentClaude Developer Platform docsT1highdeterministic

Tokenizertokenizer1

Claim history for Tokenizer
ValueValid from → toStatusSourceConfidenceExtractor
Claude → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

API model idapi_model_id1

Claim history for API model id
ValueValid from → toStatusSourceConfidenceExtractor
claude-sonnet-5 → currentcurrentClaude Developer Platform docsT1highdeterministic

API aliasapi_alias1

Claim history for API alias
ValueValid from → toStatusSourceConfidenceExtractor
claude-sonnet-5 → currentcurrentClaude Developer Platform docsT1highdeterministic

Retirement dateretirement_date1

Claim history for Retirement date
ValueValid from → toStatusSourceConfidenceExtractor
30 Jun 2027 → currentcurrentClaude Developer Platform docsT1highdeterministic

Retirement tentativeretirement_tentative1

Claim history for Retirement tentative
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentClaude Developer Platform docsT1highdeterministic

Official pageofficial_url1

Claim history for Official page
ValueValid from → toStatusSourceConfidenceExtractor
https://platform.claude.com/docs/en/models/sonnet-5/overview → currentcurrentClaude Developer Platform docsT1highdeterministic

Bedrock model idbedrock_model_id1

Claim history for Bedrock model id
ValueValid from → toStatusSourceConfidenceExtractor
anthropic.claude-sonnet-5 → currentcurrentClaude Developer Platform docsT1highdeterministic

Claude aws model idclaude_aws_model_id1

Claim history for Claude aws model id
ValueValid from → toStatusSourceConfidenceExtractor
claude-sonnet-5 → currentcurrentClaude Developer Platform docsT1highdeterministic

Default effortdefault_effort1

Claim history for Default effort
ValueValid from → toStatusSourceConfidenceExtractor
high → currentcurrentClaude Developer Platform docsT1highdeterministic

Descriptiondescription1

Claim history for Description
ValueValid from → toStatusSourceConfidenceExtractor
The best combination of speed and intelligence → currentcurrentClaude Developer Platform docsT1highdeterministic

File inputfile_input1

Claim history for File input
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Foundry model idfoundry_model_id1

Claim history for Foundry model id
ValueValid from → toStatusSourceConfidenceExtractor
claude-sonnet-5 → currentcurrentClaude Developer Platform docsT1highdeterministic

Latency tierlatency_tier1

Claim history for Latency tier
ValueValid from → toStatusSourceConfidenceExtractor
Fast → currentcurrentClaude Developer Platform docsT1highdeterministic

Openrouter idopenrouter_id1

Claim history for Openrouter id
ValueValid from → toStatusSourceConfidenceExtractor
anthropic/claude-sonnet-5 → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Reasoningreasoning1

Claim history for Reasoning
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Structured outputstructured_output1

Claim history for Structured output
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Supported parameterssupported_parameters1

Claim history for Supported parameters
ValueValid from → toStatusSourceConfidenceExtractor
include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, stop, structured_outputs, tool_choice, tools, verbosity → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Thinkingthinking1

Claim history for Thinking
ValueValid from → toStatusSourceConfidenceExtractor
Adaptive → currentcurrentClaude Developer Platform docsT1highdeterministic

Tool callingtool_calling1

Claim history for Tool calling
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentClaude Developer Platform docsT1highdeterministic

Vertex model idvertex_model_id1

Claim history for Vertex model id
ValueValid from → toStatusSourceConfidenceExtractor
claude-sonnet-5 → currentcurrentClaude Developer Platform docsT1highdeterministic

Visionvision1

Claim history for Vision
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentClaude Developer Platform docsT1highdeterministic

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

35

Source tiers

T1T226 / 9

Freshest observation

2 h ago

Conflicts

8 flagged

Source documents 6

Source documents
SourceDocumentTypeTierLast observedSnapshots
Claude Developer Platform docsdocs.claude.com/en/docs/about-claude/pricing.md pricingT1· Official4 h ago1
Claude Developer Platform docsdocs.claude.com/en/docs/about-claude/models/overview.md model_docsT1· Official4 h ago1
Claude Developer Platform docsplatform.claude.com/docs/en/models/sonnet-5/overview.md model_pageT1· Official12 h ago1
OpenRouter public model & pricing listingopenrouter.ai/api/v1/models catalogueT2· Quality secondary3 h ago7
LiveBenchlivebench.ai/table_2026_06_25.csv leaderboardT2· Quality secondary10 h ago1
Artificial Analysisartificialanalysis.ai/leaderboards/models leaderboardT2· Quality secondary10 h ago1

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 →