Which models for which task? 20x Max plan

A developer is seeking advice on optimal AI models for code-planning, implementation, and subagent commanding tasks, noting mixed results with Sonnet 5. While Sonnet 5 is slow, taking 10-20 minutes for tasks Opus 5 completes in 2-3 minutes and Fable in 1-2 minutes, it consumes less weekly usage quota. The developer finds Codex 5.6-Sol superior to all Claude models for overall performance, completing work incredibly fast and accurately compared to Fable, Opus, or Sonnet, despite currently being on a Claude 20x Max plan.