Model Tracker
Claude Sonnet 4.6
Claude Sonnet 4.6 is an AI model made by Anthropic. Anthropic released it on 17 February 2026. It is generally available.
In inglese
Claude Sonnet 4.6 is an AI model made by Anthropic. Anthropic released it on 17 February 2026. It is generally available. Its context window is 1,000,000 tokens. Its longest answer is 128,000 tokens. Through the API it costs $3.00 per 1M tokens for input and $15.00 per 1M tokens for output.
- Released
- 17 February 2026 — www.anthropic.com, read 16 October 2026
- Status
- Generally available — docs.anthropic.com, read 16 October 2026
- Takes
- Text, Image — www.anthropic.com, read 16 October 2026
- Returns
- Not confirmed: two readings disagree: text, audio and text
- Open weights
- Not confirmed: The maker's reviewed model, system-card, and API documentation pages do not state whether Claude Sonnet 4.6 has open weights.
- Licence
- Not confirmed: The maker's reviewed pages do not print a model-specific licence name.
- Context window
- 1,000,000 tokens — platform.claude.com, read 16 October 2026
- Longest answer
- 128,000 tokens — platform.claude.com, read 16 October 2026
- Knowledge cutoff
- Not confirmed: Anthropic's official pages conflict: the Transparency Hub gives a knowledge cutoff date of May 2025, while the model overview gives a reliable knowledge cutoff of Aug 2025. I cannot confirm one date from these pages.
- API price, input
- $3.00 per 1M tokens — platform.claude.com, read 16 October 2026
- API price, output
- $15.00 per 1M tokens — platform.claude.com, read 16 October 2026
- Where
- API, Consumer app, Cloud marketplaces — www.anthropic.com, read 16 October 2026
- Parameters
- Not confirmed: The maker's reviewed model, system-card, and API documentation pages do not publish a parameter count for Claude Sonnet 4.6.
- Model card
- https://www-cdn.anthropic.com/78073f739564e986ff3e28522761a7a0b4484f84.pdf — www-cdn.anthropic.com, read 16 October 2026
Benchmarks
Measured by others, not by the maker: each score with the name the measurer gives the model and the setting it ran, its day and its licence.
Arena
- Text Arena, claude-sonnet-4-6: 1,472 (1,469–1,476, 70,931 votes), published 15 October 2026
- Code Arena (WebDev), Claude Sonnet 4.6: 1,523 (1,518–1,528, 22,832 votes), published 18 October 2026
- Vision Arena, claude-sonnet-4-6: 1,275 (1,269–1,281, 27,422 votes), published 9 October 2026
Arena’s leaderboard dataset (lmarena-ai/leaderboard-dataset on Hugging Face), CC BY 4.0: ratings from people’s votes between two anonymous models, as Arena publishes them. Data · CC BY 4.0
Epoch AI
- Epoch Capabilities Index, Claude Sonnet 4.6: 152.4 (150.0–154.7), as of 19 October 2026
- GPQA Diamond, claude-sonnet-4-6_32K: 87.4% (± 2.0), run 20 February 2026
- GPQA Diamond, claude-sonnet-4-6_high: 83.3% (± 2.7), run 13 July 2026
- GPQA Diamond, claude-sonnet-4-6_medium: 83.3% (± 2.7), run 13 July 2026
- GPQA Diamond, claude-sonnet-4-6_max: 78.8% (± 2.9), run 6 August 2026
- SWE-bench Verified, claude-sonnet-4-6: 75.2% (± 2.0), run 21 February 2026
- OTIS Mock AIME 2024–2025, claude-sonnet-4-6_32K: 85.8% (± 4.5), run 20 February 2026
- OTIS Mock AIME 2024–2025, claude-sonnet-4-6_medium: 82.2% (± 5.8), run 13 July 2026
- OTIS Mock AIME 2024–2025, claude-sonnet-4-6_high: 75.6% (± 6.5), run 13 July 2026
- OTIS Mock AIME 2024–2025, claude-sonnet-4-6_max: 71.1% (± 6.8), run 6 August 2026
- SimpleQA Verified, claude-sonnet-4-6_high: 35.5% (± 1.5), run 10 August 2026
- SimpleQA Verified, claude-sonnet-4-6_max: 32.8% (± 1.5), run 27 August 2026
Epoch AI, ‘Capabilities & benchmarking’, epoch.ai/benchmarks, CC BY 4.0: Epoch AI’s own runs and its Capabilities Index. Data · CC BY 4.0
Questions
When was Claude Sonnet 4.6 released?
Anthropic released Claude Sonnet 4.6 on 17 February 2026.
Is Claude Sonnet 4.6 still available?
Yes: it is generally available, as Anthropic states it.
What is the context window of Claude Sonnet 4.6?
The context window of Claude Sonnet 4.6 is 1,000,000 tokens, as Anthropic prints it.
How much does the Claude Sonnet 4.6 API cost?
On the standard tier, Claude Sonnet 4.6 costs $3.00 per 1M tokens for input and $15.00 per 1M tokens for output, as Anthropic lists it.
More from Anthropic
- Claude 1.0
- Claude 1.1
- Claude 1.2
- Claude 1.3
- Claude 2
- Claude 2.1
- Claude 3 Haiku
- Claude 3 Opus
- Claude 3 Sonnet
- Claude 3.5 Haiku
- Claude Fable 5
- Claude Fable 5.1
- Claude Haiku 4.5
- Claude Haiku 5.5
- Claude Instant 1.0
- Claude Instant 1.1
- Claude Instant 1.2
- Claude Mythos Preview
- Claude Opus 4.1
- Claude Opus 4.5
- Claude Opus 4.6
- Claude Opus 4.7
- Claude Opus 4.8
- Claude Opus 5
Sources
- Introducing Sonnet 4.6 (read 16 October 2026)
- Anthropic’s Transparency Hub (read 16 October 2026)
- Model deprecations (read 16 October 2026)
- Claude Sonnet 4.6 - Claude Platform Docs (read 16 October 2026)
- Claude Sonnet 4.6 System Card (read 16 October 2026)