Claude Sonnet 4.6
Anthropicfamily · Claude
Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work. It excels at iterative development, complex codebase navigation, end-to-end project management with...
Updated 5 h ago · first seen 11 Sept 2026
model_01M293VBDR0M6AW04ZF87NWSSJ
Overview
Identity
Identity block not returned by the API for this entity.
Openness
Openness not classified yet — no sourced evidence to place this model in the ontology.
Key facts
- Release date
Source:OpenRouter public model & pricing listingT2observed 12 h agomedium
- Status
Source:Claude Developer Platform docsT1observed 12 h agohigh
- Retirement date
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
Capabilities
Modalities
- Modalities
- imagetext
- Input
- imagetext
- Output
- text
Capabilities
Tool calling
Yes
OpenRouter public model & pricing listing · T2
Structured output
Yes
OpenRouter public model & pricing listing · T2
Reasoning
Yes
OpenRouter public model & pricing listing · T2
Vision
Yes
OpenRouter public model & pricing listing · T2
Audio
Unavailable
Fine-tuning available
Unavailable
- Context window
Source:OpenRouter public model & pricing listingT2observed 12 h agomedium
- Max output
Source:OpenRouter public model & pricing listingT2observed 12 h agomedium
- Tokenizer
Source:OpenRouter public model & pricing listingT2observed 12 h agomedium
Benchmarks7
Compare with another model →Comparable same task and conditions · Partially comparable same task, conditions differ (effort, temperature, judge) · Not comparable different variant or metric
No benchmark results recorded
Providers & Pricing3
All offers in the price terminal →USD per 1M tokens as published by each provider (USD). Rows are append-only: every change is kept in the history below.
Price history
Output price · USD / 1M tokens 1 provider
- Anthropic API
- Anthropic API$15 → $7.511 Sept 2026
- Anthropic APIfirst observed $1511 Sept 2026
Input price · USD / 1M tokens 1 provider
- Anthropic API
- Anthropic API$3 → $1.511 Sept 2026
- Anthropic APIfirst observed $311 Sept 2026
Timeline13
Full timeline →Claude Sonnet 4.6: reasoning changed from false to true
ReasoningNo→YesopenrouterClaude Sonnet 4.6 scores 46.21% on Terminal-Bench
artificial_analysisClaude Sonnet 4.6 scores 79.53% on τ²-bench
artificial_analysisClaude Sonnet 4.6 scores 70.58% on MMMU-Pro
artificial_analysisClaude Sonnet 4.6 scores 41.16% on IFBench
artificial_analysisClaude Sonnet 4.6 scores 13.35% on Humanity's Last Exam
artificial_analysisClaude Sonnet 4.6 scores 79.9% on GPQA
artificial_analysisClaude Sonnet 4.6 scores 24.69 on Artificial Analysis Intelligence Index
artificial_analysisClaude Sonnet 4.6: reasoning changed from true to false
ReasoningYes→Noartificial_analysisAnthropic API lists Claude Sonnet 4.6 at $1.5 in / $7.5 out per 1M tokens
openrouterAnthropic API lists Claude Sonnet 4.6 at $3 in / $15 out per 1M tokens
openrouterAnthropic API lists Claude Sonnet 4.6 at $3 in / $15 out per 1M tokens
anthropic
Change history23
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 26 claims in force
- Family
- Claude
- Release date
- 17 Feb 2026
- Status
- active
- Openness
- proprietary
- Context window
- 1M tokens
- Max output
- 128K tokens
- Modalities
- document, image, text
- Input modalities
- document, image, text
- Output modalities
- text
- Tokenizer
- Claude
- Retirement date
- 17 Feb 2027
- Retirement tentative
- Yes
- Aa context window
- 1,000,000
- Aa deprecated
- Yes
- Aa openness
- proprietary
- File input
- Yes
- Aa median output tokens per second
- 42.4
- Openrouter id
- anthropic/claude-sonnet-4.6
- Openrouter listed at
- 17 Feb 2026
- Reasoning
- Yes
- Structured output
- Yes
- Supported parameters
- include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, stop, structured_outputs, temperature, tool_choice, tools, top_k, top_p, verbosity
- Tool calling
- Yes
- Vision
- Yes
- Weights available
- No
Familyfamily1
Release daterelease_date1
Statusstatus2conflicting claims
Opennessopenness1
Context windowcontext_length1
Max outputmax_output_tokens1
Modalitiesmodalities1
Input modalitiesmodalities_input1
Output modalitiesmodalities_output1
Tokenizertokenizer1
Retirement dateretirement_date1
Retirement tentativeretirement_tentative1
Descriptiondescription1
File inputfile_input1
Aa median output tokens per secondmetric.aa_median_output_tokens_per_second1
Openrouter idopenrouter_id1
Reasoningreasoning2
Structured outputstructured_output1
Supported parameterssupported_parameters1
Tool callingtool_calling1
Visionvision1
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
22
Source tiers
T1T25 / 17
Freshest observation
5 h ago
Conflicts
1 flagged
Source documents 4
Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.
Data quality (65/100) measures how well AI Atlas knows this entity — completeness, primary-source ratio, freshness, conflicts — never how good the model is. Methodology →