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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.248 ·

Model tables extended to Opus 4.7, 4.8 and Opus 5

Model tables now list claude-opus-4-7, claude-opus-4-8 and claude-opus-5.

You'll notice Notable Improvements
JSON All of v2.1.248
You'll noticeTier: how much it should matter to you
4Useful: my rating, 1 to 5
5Signal: worth watching, 1 to 5
ModelsArea: what it touches
ImprovementsKind: in v2.1.248,
What probably matters to youSection of the release
What

The tables of recognised model identifiers now enumerate claude-opus-4-7, claude-opus-4-8 and claude-opus-5, alongside a legacy set and a display-name map.

Evidence

"claude-opus-4-8",

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

Read from
Names in the bundleclaude-opus-4-7claude-opus-4-8claude-opus-5
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 prompting-claude-opus-4-8 touched a line naming claude-opus-4-8 after this was published. This guide covers the prompting patterns specific to Claude Opus 4.8. For the API changes involved in moving from Claude Opus 4.8 to Claude Opus 5.5, see [Migrating to Claude Opus 5.5 from Claude Opus 4.8](https://platform.claude.com/docs/… build-with-claude/prompt-engineering/prompting-claude-opus-4-8 see the edit
Added since A small documentation edit on fast-mode touched a line naming claude-opus-4-7 after this was published. Fast mode is not available on Claude Opus 4.7. Requests to `claude-opus-4-7` with `speed: "fast"` return an error; unlike Claude Opus 4.6 (see the following note), requests do not fall back to standard speed. The model itself remains avail… build-with-claude/fast-mode see the edit
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
Confirmed since Anthropic's documentation has since written up claude-opus-4-7, on Create Session. - `"claude-opus-4-7"` api/beta/sessions/create see the edit
Confirmed since Anthropic's documentation has since written up claude-opus-4-8, on Create Session. - `"claude-opus-4-8"` 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 v2.1.248 →

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