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Anthropic's Claude Opus 4.8 silently disables 'Thinking' feature

By PulseAugur Editorial · [2 sources] ·

Users are reporting that Anthropic's Claude Opus 4.8 update appears to have disabled a "Thinking" feature without explicit notification. This change, noticed by some users over the past week, has led to confusion regarding response quality. The issue was identified and shared to help others experiencing similar unexpected changes in Claude's output. AI

IMPACT Users may experience unexpected changes in Claude's reasoning capabilities due to a silently disabled feature.

RANK_REASON User reports of a feature change in a released product.

Read on r/ClaudeAI →

AI-generated summary · Google Gemini · from 2 sources. How we write summaries →

Anthropic's Claude Opus 4.8 silently disables 'Thinking' feature

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
User reports of a feature change in a released product.
Source corroboration
2 independent sources
Multiple independent publishers reporting the same story raises confidence that it's real and newsworthy.
Topics
product, other
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
92 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [2]

  1. r/Anthropic TIER_1 English(EN) · /u/BenAttanasio ·

    Opus 4.8 silently turned off my Thinking toggle

    <table> <tr><td> <a href="https://www.reddit.com/r/Anthropic/comments/1tzfsmo/opus_48_silently_turned_off_my_thinking_toggle/"> <img alt="Opus 4.8 silently turned off my Thinking toggle" src="https://preview.redd.it/v4ucm0c1uv5h1.png?width=640&amp;crop=smart&amp;auto=webp&amp;s=8…

  2. r/ClaudeAI TIER_2 English(EN) · /u/BenAttanasio ·

    Opus 4.8 silently turned off my Thinking toggle

    <table> <tr><td> <a href="https://www.reddit.com/r/ClaudeAI/comments/1tzft2o/opus_48_silently_turned_off_my_thinking_toggle/"> <img alt="Opus 4.8 silently turned off my Thinking toggle" src="https://preview.redd.it/lycwryt1uv5h1.png?width=640&amp;crop=smart&amp;auto=webp&amp;s=e7…

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