[Bug] Claude 3 Opus model performance degradation

[iamladi]

Bug Description Today it feels like Opus is the dummest model ever. Why?

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.0.76
• Feedback ID: 7d09b291-2746-4782-af03-1456d62a2683

Errors

[{"error":"Error: Plugin hook \"python3 /Users/iamladi/.claude/plugins/cache/claude-plugins-official/security-guidance/6d3752c000e2/hooks/security_reminder_hook.py\" failed with exit code 126\nstderr: No version is set for command python3\nConsider adding one of the following versions in your config file at /Users/iamladi/Projects/micro-saas/refocus/.tool-versions\nstdout: python 3.9.19\npython 3.13.5\npython 3.13.0\npython 3.10.0\n    at Object.callback (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1204:13)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async RJ7 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4707:1190)\n    at async file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4700:1121\n    at async xHA (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2171:2659)\n    at async ms (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4700:4169)\n    at async dF0 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4700:8499)\n    at async Gu5 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2207:24034)\n    at async Au5 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2207:14943)","timestamp":"2025-12-29T08:52:49.032Z"},{"error":"Error: Plugin hook \"python3 /Users/iamladi/.claude/plugins/cache/claude-plugins-official/security-guidance/6d3752c000e2/hooks/security_reminder_hook.py\" failed with exit code 126\nstderr: No version is set for command python3\nConsider adding one of the following versions in your config file at /Users/iamladi/Projects/micro-saas/refocus/.tool-versions\nstdout: python 3.9.19\npython 3.13.5\npython 3.13.0\npython 3.10.0\n    at Object.callback (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1204:13)\n    at async RJ7 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4707:1190)\n    at async file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4700:1121\n    at async xHA (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2171:2659)\n    at async ms (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4700:4169)\n    at async dF0 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4700:8499)\n    at async Gu5 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2207:24034)\n    at async Au5 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2207:14943)","timestamp":"2025-12-29T08:52:49.185Z"},{"error":"Error: Plugin hook \"python3 /Users/iamladi/.claude/plugins/cache/claude-plugins-official/security-guidance/6d3752c000e2/hooks/security_reminder_hook.py\" failed with exit code 126\nstderr: No version is set for command python3\nConsider adding one of the following versions in your config file at /Users/iamladi/Projects/micro-saas/refocus/.tool-versions\nstdout: python 3.9.19\npython 3.13.5\npython 3.13.0\npython 3.10.0\n    at Object.callback (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1204:13)\n    at async RJ7 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4707:1190)\n    at async file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4700:1121\n    at async xHA (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2171:2659)\n    at async ms (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4700:4169)\n    at async dF0 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4700:8499)\n    at async Gu5 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2207:24034)\n    at async Au5 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2207:14943)","timestamp":"2025-12-29T08:52:49.375Z"},{"error":"Error: Plugin hook \"python3 /Users/iamladi/.claude/plugins/cache/claude-plugins-official/security-guidance/6d3752c000e2/hooks/security_reminder_hook.py\" failed with exit code 126\nstderr: No version is set for command python3\nConsider adding one of the following versions in your config file at /Users/iamladi/Projects/micro-saas/refocus/.tool-versions\nstdout: python 3.9.19\npython 3.13.5\npython 3.13.0\npython 3.10.0\n    at Object.callback (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1204:13)\n    at async RJ7 (file:///Users/iamladi/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:4707:1190)\n    at async file:///Users/iamladi/.claude/local/node_modules/@anthrop

Note: Error logs were truncated.

[github-actions[bot]]

Found 3 possible duplicate issues:

1. https://github.com/anthropics/claude-code/issues/15481
2. https://github.com/anthropics/claude-code/issues/14588
3. https://github.com/anthropics/claude-code/issues/12673

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
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[github-actions[bot]]

This issue has been automatically closed as a duplicate of #15481.

If this is incorrect, please re-open this issue or create a new one.

🤖 Generated with Claude Code