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?

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?›

#72 of 336 in Chat & Knowledge, #48 of 134 in Coding, #63 of 135 in Agents & Tool Use, #36 of 197 in Writing & Language, #63 of 125 in Vision & Documents. Strongest at: Reasoning, Science, Long context, Knowledge.

Is Claude Sonnet 4.6 better than GLM 5.2?›

On DeepSWE 1, Claude Sonnet 4.6 scores 31.8 vs 41.5 — lower.

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 It has been superseded by Claude Sonnet 5.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 5.2.

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-5.4 (cheaper), GPT-5.5 (better), GLM 5.2 (open weights).