Claude Code v2.1.285 · 29 Sep 2026
Claude Code now says why the 'highlights' feature is unavailable
When 'highlights' is unavailable, Claude Code now names the reason: provider, experimental betas turned off, model, or the API rejecting it
You'll notice Tier: how much it should matter to you
2 Useful: my rating, 1 to 5
4 Signal: worth watching, 1 to 5
Thinking Display Area: what it touches
Improvements Kind: in v2.1.285, 29 Sep 26
What probably matters to you Section of the release
What
'Highlights' is a beta (pre-release) feature. When it cannot be used, Claude Code now looks up the reason in a fixed list and names it. The reasons are:
the provider, the service that runs the model, does not support it
experimental betas are off, through CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS or organization policy
the model does not support it
the API rejected the request
Why
If highlights does not work for you, the reason now points at what to check, such as whether CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS is set.
How sure we are
Something disagrees Something we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt It is not clear where the reason is shown to a reader.
See this entry in the whole of v2.1.285 →
29 Sep 2026 · 428 entries, this one is #27.
Use it now17 You'll notice286 Nothing to try yet7 Under the hood118
Open the release →
Names in this entry
env CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS Set to 1 to strip Anthropic-specific anthropic-beta request headers and beta tool-schema fields (such as defer_loading and eager_input_streaming) from API requests. Use this when a proxy gateway rejects requests with errors like "Unexpected value(s) for the anthropic-beta header" or "Extra inputs are not permitted". Standard fields (name, description, input_schema, cache_control) are preserved. MCP tool search is disabled and all MCP tools load upfront, even when you set ENABLE_TOOL_SEARCH. On Claude Code v2.1.227 or later, managed settings can keep tool search on. Disable pre-release capabilities covers where the override applies
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What's wrong with this entry?
Hard to understand Too vague Looks wrong Not relevant to me Too long Missing the detail I wanted Duplicate of another card
Clear Learned something new I can act on this Good catch
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.
← Previous · 26 of 428
Turn off web page fetching with CLAUDE_CODE_DISABLE_WEB_FETCH
Use it now Web Fetch
In v2.1.285 What probably matters to you release-page order
Next → · 28 of 428
Artifact pinning no longer waits on a remote switch
Use it now Artifacts