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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.268 ·

Model family allowlist extended with placeholder future models

Model list now recognizes placeholder future Claude models like claude-opus-4-6 and claude-sonnet-4-6

Under the hood Internal Changes
JSON All of v2.1.268
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
Internal ChangesKind: in v2.1.268,
What probably matters to youSection of the release

Unclear The finding does not say whether these models are actually available or when they might be.

What

The internal list of known first-party Claude model families was extended to include claude-opus-4-6, claude-opus-4-7, and claude-sonnet-4-6, alongside the existing 4.x and 4.5 entries. A helper was also added to check whether a model string contains "application-inference-profile".

Why

This is preparatory groundwork so Claude Code recognizes these model names if and when they become available, rather than treating them as unknown; it does not mean these models are usable now.

Read from
Names in the bundleclaude-opus-4-6claude-opus-4-7claude-sonnet-4-6
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 overview touched a line naming claude-sonnet-4-6 after this was published. <Card title="System prompt" icon="text" href="https://platform.claude.com/docs/en/release-notes/system-prompts/overview#claude-sonnet-4-6"> models/sonnet-4-6/overview see the edit
Added since A small documentation edit on fast-mode touched a line naming claude-opus-4-6 after this was published. Fast mode is not available on Claude Opus 4.6. Requests to `claude-opus-4-6` with `speed: "fast"` do not return an error: they run at standard speed and are billed at [standard rates](https://platform.claude.com/docs/en/about-claude/pricin… build-with-claude/fast-mode 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
Confirmed since Anthropic's documentation has since written up claude-sonnet-4-6, on Messages. - `"claude-sonnet-4-6"` api/beta/messages see the edit
Confirmed since Anthropic's documentation has since written up claude-opus-4-6, on Messages. - `"claude-opus-4-6"` api/beta/messages see the edit
Confirmed since Anthropic's documentation has since written up claude-opus-4-7, on Messages. - `"claude-opus-4-7"` api/beta/messages see the edit
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtThe finding does not say whether these models are actually available or when they might be.
Anthropic's documentation agreesAnthropic's documentation has since written up claude-opus-4-7, on Messages.

See this entry in the whole of v2.1.268 →

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