Model by Anthropic

Claude Sonnet 4.6

Claude Sonnet 4.6 is Anthropic's mid-priced model for everyday coding and agent work, and it is now a legacy model, so new projects should look at Sonnet 5.5 first.

Checked 2026-11-05

Claude Sonnet 4.6 is Anthropic's mid-priced model for everyday coding and agent work, and it is now a legacy model, so new projects should look at Sonnet 5.5 first. Anthropic released it on 17 February 2026 with a 1M token context window and up to 128K tokens of output. Its list price is $3 per million input tokens and $15 per million output tokens, which matches OpenRouter's listing as of 5 November 2026. Sonnet 5.5 costs $2 and $10 on the same Anthropic page, so the older model is dearer and has an earlier knowledge cutoff, August 2025 against June 2026. It takes text and images in and returns text. Anthropic says it will not retire it sooner than 17 February 2027, and the Batch API halves the price. You can reach it through the Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry or OpenRouter. The catch is that extended thinking with a token budget is deprecated on it, so older prompts may need adaptive thinking. We have not run it ourselves. We would keep it only where an existing pipeline is tuned to it. Figures come from Anthropic's model page and OpenRouter's list.

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Questions

What is the context window of Claude Sonnet 4.6?

1,000,000 tokens, with up to 128,000 tokens of output.

How much does Claude Sonnet 4.6 cost?

$3 per million input tokens and $15 per million output tokens, checked 31 October 2026.

Can I run Claude Sonnet 4.6 on my own hardware?

No. The weights are not published, so you use it through the maker's API or a hosting provider.

Who makes Claude Sonnet 4.6?

Anthropic makes it, and released it on 17 February 2026.

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Where you can run it

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    • Model gateway (router)
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