LessWrong posts by zvi

“Claude Sonnet 4.6 Gives You Flexibility” by Zvi


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Anthropic first gave us Claude Opus 4.6, then followed up with Claude Sonnet 4.6.

For most purposes Sonnet 4.6 is not as capable as Opus 4.6, but it is not that far behind, it would have been fully frontier-level a few months ago, and it is faster and cheaper than Opus.

That has its advantages, including that Sonnet is in the free plan, and it seems outright superior for computer use.

Anthropic: Claude Sonnet 4.6 is available now on all plans, Cowork, Claude Code, our API, and all major cloud platforms.

We’ve also upgraded our free tier to Sonnet 4.6 by default—it now includes file creation, connectors, skills, and compaction.

Claude Sonnet 4.6 is our most capable Sonnet model yet. It's a full upgrade of the model's skills across coding, computer use, long-context reasoning, agent planning, knowledge work, and design. Sonnet 4.6 also features a 1M token context window in beta.

JB: I use it all the time because I’m poor.

This substantially upgrades Claude's free tier for coding and computer use. It gives us all a better lightweight option, including for sub-agents where you would have previously needed to use Haiku. [...]

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Outline:

(01:53) On Your Marks

(10:09) Reactions: Its How Much You Save

(18:56) Bringing It Together

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First published:

February 23rd, 2026

Source:

https://www.lesswrong.com/posts/u2vFY4wefyqPwwDH8/claude-sonnet-4-6-gives-you-flexibility

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Narrated by TYPE III AUDIO.

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Images from the article:

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