[Bug] Claude 3.5 Sonnet performance degradation compared to previous behavior

Bug Description
opus4.6 feels retard recently, do you change the model silently? Codex performs way better than opus4.6

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.101
• Feedback ID: 216a724f-b390-4f9b-8fd7-2755a1d6d79d

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/bytedance/.local/share/claude/versions/2.1.101 (expected in multi-process scenarios)\n    at Oc_ (/$bunfs/root/src/entrypoints/cli.js:2836:2153)\n    at Ve6 (/$bunfs/root/src/entrypoints/cli.js:2836:1233)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-12T02:56:32.724Z"},{"error":"Error: ripgrep exited with code null\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:528:2814)\n    at emit (node:events:98:22)\n    at #maybeClose (node:child_process:766:16)\n    at #handleOnExit (node:child_process:520:72)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-12T03:06:22.412Z"},{"error":"RipgrepTimeoutError: Ripgrep search timed out after 20 seconds. The search may have matched files but did not complete in time. Try searching a more specific path or pattern.\n    at T (/$bunfs/root/src/entrypoints/cli.js:531:242)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:531:456)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:528:2885)\n    at emit (node:events:98:22)\n    at #maybeClose (node:child_process:766:16)\n    at #handleOnExit (node:child_process:520:72)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-12T03:06:22.413Z"}]