# Simon Willison adds Fable 5.2 and Mythos 5.2 support to llm-anthropic 0.31

> Original title: llm-anthropic 0.31

- Source: Simon Willison
- Published: 2026-11-09T23:58:46.000Z
- Bad Influence: https://badinfluence.news/items/o4wxnz7kvvhpewo7edayq2a0z
- Original: https://simonwillison.net/2026/Nov/9/llm-anthropic/

## Summary

Simon Willison has added Fable 5.2 and Mythos 5.2 support to llm-anthropic, letting users run prompts through them with the llm tool and the model ID claude-fable-5.2. He ran pelican SVG prompts at five reasoning levels, low, medium, high, xhigh, and max, and max returned no image after exhausting 128,000 thinking tokens. He says the same max-effort bug appeared with Opus 5.5, while Fable 5 and Fable 5.1 returned max-effort pelicans correctly.