Ethan Mollick Demonstrates Fable 5.2 and Jagged AGI

What happened

Ethan Mollick says he had early access to Fable 5.2 and uses demonstrations of launching a business, conducting academic research, hacking hardware, and building 3D models to illustrate what he sees as its powers and limits. He describes it as a sort of Jagged AGI and links to a longer article.

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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.