Verdict
Keep Claude when careful reasoning, long-form writing, and Claude Code are the whole point of the seat. Switch only when the job is really asking for something Claude is not optimized to be: ChatGPT for broad mixed-role coverage, Perplexity for research retrieval, or Gemini for Google-native deployment.
Best for
Teams that want one broad default instead of a specialist option.
Avoid if
Keep looking if the team is paying for reasoning-first or premium Claude seats but repeatedly runs into missing breadth, sourced research depth, or suite rollout fit.
Updated because: Teams comparing Claude as an agent-stack model should stop using the old 4.6 labels. Fable is now the highest-capability Claude option, Opus remains the complex coding and enterprise-work choice, Sonnet is the balance point, and Haiku is the scaled low-cost option.