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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.257 ·

Compiled seed catalog includes Opus 5 / Sonnet 5 placeholders

The compiled-in seed catalog used before the first fetch lists claude-opus-5, claude-sonnet-5 and claude-haiku-4-5.

Under the hood Nothing to try yet In Development
JSON All of v2.1.257
Under the hoodTier: how much it should matter to you
3Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
Model CatalogArea: what it touches
In DevelopmentKind: in v2.1.257,
What probably matters to youSection of the release

The compiled-in seed document used before the first successful published-catalog fetch lists claude-opus-5, claude-sonnet-5, and claude-haiku-4-5 as the model roster.

Read from
Names in the bundleclaude-opus-5claude-sonnet-5claude-haiku-4-5
What the documentation says
Documented inapi/about-claude/model-deprecations
Since it was published

The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.

Added since A small documentation edit on Models overview touched a line naming claude-opus-5 after this was published. | [Claude Platform on AWS ID](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws) | `claude-fable-5-1` | `claude-opus-5` | `claude-sonnet-5` | `claude-haiku-4-5` | models/overview see the edit
Added since A small documentation edit on Models overview touched a line naming claude-haiku-4-5 after this was published. | [Claude Platform on AWS ID](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws) | `claude-fable-5-1` | `claude-opus-5` | `claude-sonnet-5` | `claude-haiku-4-5` | models/overview see the edit
Added since A small documentation edit on Models overview touched a line naming claude-sonnet-5 after this was published. | [Claude Platform on AWS ID](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws) | `claude-fable-5-1` | `claude-opus-5` | `claude-sonnet-5` | `claude-haiku-4-5` | models/overview see the edit
Confirmed since Anthropic's documentation has since written up claude-haiku-4-5, on Create Session. - `"claude-haiku-4-5"` api/beta/sessions/create see the edit
Confirmed since Anthropic's documentation has since written up claude-sonnet-5, on Create Session. - `BetaManagedAgentsModel = "claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more or string` api/beta/sessions/create see the edit
Confirmed since Anthropic's documentation has since written up claude-opus-5, on Create Session. Replacement model. Accepts the model string, e.g. `claude-opus-5`, or a `model_config` object. Omit to use the agent's model. api/beta/sessions/create see the edit
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agreesAnthropic's documentation has since written up claude-opus-5, on Create Session.

See this entry in the whole of v2.1.257 →

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