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Public story · 2026-08-04 · high
A 216-upvote Reddit thread is the only record of the change, since Anthropic's changelog doesn't mention it.
Why now: This only made the August 4 briefing because a Reddit user posted a screenshot, not because Anthropic said anything about it.
Claude is showing its extended thinking again in Anthropic's consumer app, per a screenshot on r/ClaudeAI that picked up 216 upvotes.
Visible chain-of-thought lets you catch a model heading down the wrong path mid-response. Without it, you're guessing backward from the final output.
The catch: Sonnet 5 still doesn't show it, per the same thread. Whatever changed applies to some models in Anthropic's lineup and not others. The same account can get a transparent reasoning trace on one model and a black box on the next.
Anthropic hasn't logged this anywhere. No changelog entry ties the change to a release, so what's circulating on Reddit is an observation, not an announcement. That gap matters. Users can't tell if this is a rollout in progress, a test, or a bug that exposed something meant to stay hidden.
Hiding chain-of-thought by default costs more in debugging time than it saves in interface cleanliness. If Anthropic shipped this on purpose, I'd bet the Sonnet 5 gap closes rather than persists. Leaving one model in your own lineup opaque while the rest show their work is a support headache, not a design choice you keep.
This only made the August 4 briefing because a Reddit user posted a screenshot, not because Anthropic said anything about it.
Each link below shares sources, entities, or timing with this story.
Anthropic released Claude / Shared entities / Same source domain / Shared topic / Earlier coverage / Tension
Linked by a graph relationship (Anthropic released Claude); both cover Anthropic, CLAUDE, ClaudeAI; reported by the same outlet (reddit.com).
Claude Code uses Sonnet / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Claude Code uses Sonnet); both cover Anthropic, Claude, ClaudeAI; reported by the same outlet (reddit.com).
Linked by a graph relationship (Claude Code uses Sonnet); both cover Anthropic, Claude, ClaudeAI; reported by the same outlet (reddit.com).
Linked by a graph relationship (Claude Code uses Sonnet); both cover Anthropic, Claude, ClaudeAI; reported by the same outlet (reddit.com).
Linked by a graph relationship (Claude Code uses Sonnet); both cover Anthropic, Claude, ClaudeAI; reported by the same outlet (reddit.com).
Claude Opus built by Anthropic / Shared entities / Same source domain / Earlier coverage / Tension
Linked by a graph relationship (Claude Opus built by Anthropic); both cover Anthropic, ClaudeAI, Sonnet; reported by the same outlet (reddit.com).
Anthropic released Claude / Shared entities / Same source domain / Shared topic / Earlier coverage / Tension
Linked by a graph relationship (Anthropic released Claude); both cover CLAUDE, ClaudeAI; reported by the same outlet (reddit.com).
Claude Code uses Sonnet / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Claude Code uses Sonnet); both cover Anthropic, ClaudeAI; reported by the same outlet (reddit.com).