Simon Willison Shows Yonkers Rising as a Giant Mech

What happened

Simon Willison used Claude Fable 5.2 Medium to create a Three.js animation in which a giant mech shaped like Yonkers rises and stomps through Manhattan, Brooklyn, Queens, and the Bronx. The scene uses OpenStreetMap mapping data and includes a stomp counter and mech height readout.

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The story so far

Anthropic released Claude Fable 5.2 and Claude Mythos 5.2, lowering API prices to $8 per million input tokens and $40 per million output tokens, from $10 and $50. Anthropic says both models improve coding, reasoning, and vision, and that Fable produces responses faster than version 5.1. Fable is available to paid users with safeguards for risky cybersecurity and biology tasks; Mythos is limited to organizations approved through Anthropic’s verification programs. The launch reports cite strong benchmark results, including Fable’s first-place score on Artificial Analysis’ Intelligence Index v5 at its highest compute tier. Those figures come from the named benchmark evaluations; Anthropic’s prerelease examples also include software migrations, electronic devices, and physics problems. TechCrunch reports that an optional faster serving mode costs twice as much, while the lower API prices apply to standard use.