Claude Fable 5.1 is now available on NanoGPT.
It improves on Fable 5 across the board, with the biggest gains in agentic coding, long-running workflows, and knowledge work. It is especially strong at long code refactors, front-end and visual code generation, finance, and analysis, while producing more concise plans and summaries.
Try it:
https://nano-gpt.com/conversation?model=anthropic%2Fclaude-fable-5.1