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.

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 17 Sep 2026 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 17 Sep 2026 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 17 Sep 2026 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 10 Sep 2026 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 10 Sep 2026 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 10 Sep 2026 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 →