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On 2026-08-07 @EXM7777 reported Opus 5 is unusable for even trivial tasks and…

2026-08-07 · 17:59 UTC ·@EXM7777 ·0 min read

Brief

Opus 5 is currently unusable, so @EXM7777 changed their CLAUDE.md to enforce exact model routing and spawn rules for sub-agents and headless workers after validating a Claude-written plan—e.g., coding -> Codex on GPT-5.6 Sol, writing -> Kimi K3—with a routing table updated as new models appear.

Why it matters

On 2026-08-07 @EXM7777 reported Opus 5 is unusable for even trivial tasks and edited their CLAUDE.md to specify exact model routing and spawn rules for sub-agents and headless workers.

Key details

  • The routing maps task types to specific models: heavy coding spawns a Codex headless worker on GPT-5.6 Sol, writing tasks spawn a Kimi K3 worker, and the user updates the routing table as new models release.
  • The routing is grounded in the plan Claude writes; the author approves that plan once so sub-agents are spawned automatically and they never repeat approval for each task.
Source evidence

Opus 5 is unusable for even trivial tasks right now, so i changed one thing inside my CLAUDE․md file that fixes it:

i specified the exact model routing i want and how to spawn sub-agents & headless workers once i've validated a plan

in practice: a heavy coding task spawns a Codex headless worker on GPT 5.6 Sol, a writing task spawns a Kimi K3 worker, and so on

i update the table as new models release

the routing is grounded in the plan Claude writes, so i approve the plan once and never repeat myself on every single task