Claude API thinking.display adds an updates mode in beta
Tech · Releases · Tue, September 1, 2026
The new updates value, behind the thinking-display-updates-2026-08-18 header, returns reasoning empty like omitted but surfaces the short progress updates Fable and Mythos models write between tool calls as text.
Every year
Also on Sep 1, 2026
| Date | Event | When |
|---|---|---|
| Tue, Sep 1, 2026 | Bear season opens (MN) | Now |
Source, method and history
- Source
- anthropic
- How we know
- From the Releases API (releases.fru.dev), which reads each vendor's changelog.
- Who
- anthropic
- Recurs
- one-off
- More on fru.dev
- releases.fru.dev
- Feed
- Subscribe to Releases
- Changes
- 2026-09-25: added to 2026-09-01