Anthropic released Claude Fable 5.1, and it's now live in SmophyAI Chat. No update needed - the new model is in your model selector right now.
Fable 5.1 sets a new performance frontier over Fable 5 for coding, knowledge work, and multi-step problem solving. It is designed for the hardest agentic workflows - including software engineering, research synthesis, business planning, and long-horizon tasks that require deeper reasoning across many steps.
Anthropic reports major gains on agentic coding and knowledge-work benchmarks, with stronger results on tasks like Terminal-Bench and CursorBench. Fable 5.1 is also positioned as more cost-efficient than Fable 5 for typical workloads.
Claude Fable 5.1 appears in the Multi-Chat view, so you can compare its responses side by side with ChatGPT, Gemini, Grok, Perplexity, DeepSeek, Claude Opus 5, and other available models on the same prompt.
Model highlights:
- Claude Fable 5.1 added to the model selector
- Stronger coding, knowledge work, and long-running agentic tasks
- Available in both Chat and Multi-Chat
- No changes to subscriptions or token allocations
- No action required from existing users
Claude Fable 5.1 is available now in SmophyAI Chat. Available on the $19.98/month plan.
