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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.242

Sonnet 5 priced at $2/$10 per million tokens

You'll notice
Useful4 Signal4
Model Docs

Claude now quotes Sonnet 5 at $2 in and $10 out per million tokens, with the introductory framing gone.

What

The bundled model catalog and migration guide now state Sonnet 5 at $2 input and $10 output per million tokens. The earlier framing of $3/$15 with an introductory $2/$10 rate expiring on 2026-08-31 is gone. This changes what Claude tells you about cost, not what the API charges.

Details
  • The migration guide's token advice changes with it: Sonnet 5's roughly 30% higher tokenizer count is now paired with a lower per-token rate, rather than described against unchanged pricing.
Evidence

per-token pricing is lower than Sonnet 4.6: $2/$10 vs $3/$15 per MTok

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.242 →