[Feature Request] Improve model response quality and guideline adherence

Bug Description
This model is frustrating: it talks too much, says useless things, doesn’t follow the guidelines it’s given, and doesn’t know how to properly connect concepts. Please urgently bring back Opus 4.6.

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 2.1.119
• Feedback ID: 522b4d30-a2b6-4883-babe-cec95fc894da

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/xxxxx/.local/share/claude/versions/2.1.119 (expected in multi-process scenarios)\n    at mH6 (/$bunfs/root/src/entrypoints/cli.js:2736:2177)\n    at E$8 (/$bunfs/root/src/entrypoints/cli.js:2736:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T09:29:04.394Z"},{"error":"AxiosError: timeout of 5000ms exceeded\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:119:13291)\n    at emit (node:events:92:22)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:118:3321)\n    at request (/$bunfs/root/src/entrypoints/cli.js:121:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T11:35:33.547Z"},{"error":"Error: ECONNREFUSED\n    at from (/$bunfs/root/src/entrypoints/cli.js:111:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:119:12876)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:118:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:253:22)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T12:16:58.367Z"},{"error":"Error: Failed to fetch version from https://downloads.claude.ai/claude-code-releases/latest: ECONNREFUSED\n    at aT5 (/$bunfs/root/src/entrypoints/cli.js:2734:5533)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T12:17:01.775Z"},{"error":"Error: Failed to fetch version from https://downloads.claude.ai/claude-code-releases/latest: ECONNREFUSED\n    at aT5 (/$bunfs/root/src/entrypoints/cli.js:2734:5533)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T12:17:01.776Z"},{"error":"Error: Connection error.\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:50:4056)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T12:20:00.873Z"},{"error":"Error: ECONNREFUSED\n    at from (/$bunfs/root/src/entrypoints/cli.js:111:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:119:12876)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:118:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:253:22)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/src/entrypoints/cli.js:121:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T12:20:15.883Z"},{"error":"AxiosError: timeout of 5000ms exceeded\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:119:13291)\n    at emit (node:events:92:22)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:118:3321)\n    at request (/$bunfs/root/src/entrypoints/cli.js:121:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T12:46:49.625Z"},{"error":"Error: Request was aborted.\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:50:3448)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T13:36:14.453Z"}]