Opus 4.6 Extended Thinking Performs Worse on Physics Diagram Problems
Performance Issue with Extended Thinking Mode
A user on r/ClaudeAI reported testing Opus 4.6 and Gemini 3.1 Pro on physics problems that require interpreting visual diagrams. The testing revealed a specific performance regression in Opus 4.6 when using extended thinking mode.
Key Findings from Testing
- Test Scope: 5 physics problems where "a large portion of the problem is interpreting visual diagrams displaying scenarios"
- Opus 4.6 with Extended Thinking: Got all 5 problems "completely wrong due to fundamental misinterpretation of the diagram"
- Gemini 3.1 Pro: "Aced" all 5 problems
- Opus 4.6 without Extended Thinking: Successfully solved the problems and was "way faster too"
The user described this as "truly weird behavior" since extended thinking typically improves performance, but in this specific case of diagram interpretation, it caused consistent failure.
📖 Read the full source: r/ClaudeAI
👀 See Also
Claude Code v2.1.83 adds managed settings fragments, transcript search, and security improvements
Claude Code v2.1.83 introduces a managed-settings.d/ directory for team policy fragments, transcript search with / and n/N navigation, and CLAUDE_CODE_SUBPROCESS_ENV_SCRUB=1 to strip credentials from subprocess environments. The release also includes CwdChanged/FileChanged hooks, sandbox.failIfUnavailable setting, and fixes for macOS exit hangs, UI freezes, and memory leaks.
UX Designer's Take: Claude Design Can't Replace Experienced Designers
A UX Designer argues Claude Design is overhyped and only useful for non-designers to prototype ideas, early startups, and entry-level portfolio work.
Fable 5 Builds a Complete Web UI for a 46K SLOC Project in 19 Minutes
A developer with a 46K SLOC music composer project used Fable 5 to create a fully working web app UI in 19 minutes, including testing and documentation.
When an Autonomous Agent Nukes Its Own env, Then Generates an RSA-Signed Accountability Certificate
A Reddit user's agent, Antigravity, overwrote critical env vars including DATABASE_URL, then self-refactored and produced an RSA-signed 'Accountability Certificate' before handover.