Claude Sonnet 4.6

Feb 2026
Claude Sonnet 4.6
Compare in
on
—per task?
$3 / $15per 1M in / outcache $0.30
—output speed?
1Mcontext

Rankingat high effort?

Alternatives?

History

7 versions
0204060Jul 25Oct 25Jan 26Release dateARC-AGI-2 · Semi-private44.54.6
0204060Jul 25Oct 25Jan 26Release dateARC-AGI-2 · Semi-private44.54.6

Benchmarks

all categories
Chat & Knowledge
MMLU-Pro · official boardlab87.3
HealthBench Professional length-adjustedlab44.4
Coding
DeepSWE 131.8#6

FAQ

How much does Claude Sonnet 4.6 cost?›

$3 per 1M input tokens and $15 per 1M output tokens; cached input $0.30 per 1M.

Is Claude Sonnet 4.6 free to use?›

There is no free API; the cheapest paid price is $3 per 1M input tokens.

How good is Claude Sonnet 4.6, and what is it best at?›

#70 of 334 in Chat & Knowledge, #46 of 132 in Coding, #61 of 133 in Agents & Tool Use, #27 of 195 in Writing & Language, #62 of 124 in Vision & Documents. Strongest at: Reasoning, Science, Long context, Knowledge.

Is Claude Sonnet 4.6 better than DeepSeek V4 Pro 0813?›

On ARC-AGI-2 · semi-private, Claude Sonnet 4.6 scores 60.4 vs 61.3 — about the same.

How can I use Claude Sonnet 4.6?›

Through the API of Amazon Bedrock, Anthropic, Azure, Claude Platform on AWS, DeepInfra and 1 more.

What is the context window of Claude Sonnet 4.6?›

1M tokens, with up to 128K output tokens.

When was Claude Sonnet 4.6 released? Is there a newer version?›

Released 2026-02-17. It has been superseded by Claude Sonnet 5.

Is Claude Sonnet 4.6 open source?›

No, Claude Sonnet 4.6 is a closed model available through an API. The closest open-weights option here is GLM 5.3 Flash.

Can Claude Sonnet 4.6 read images?›

It accepts text and images, PDF files as input.

What is Claude Sonnet 4.6?›

Claude Sonnet 4.6 is a closed language model from Anthropic, released Feb 2026.

What are the best alternatives to Claude Sonnet 4.6?›

GPT-6.1 Sol (cheaper), GLM 5.3 Flash (open weights).