Post-Cutoff

“During pre-release testing, Claude Fable 5.2 and Claude Mythos 5.2 worked on…”

Claude @claudeaiX

Archived text

During pre-release testing, Claude Fable 5.2 and Claude Mythos 5.2 worked on ambitious projects in many different fields. Here are a few.

From a one-paragraph prompt, Fable 5.2 designed three working electronic devices, including this home voice assistant hub.

Source: x.com/claudeai/status/2119899459761131615Archived 2026-11-12 via fxtwitter (unofficial).Counts: 7,054,751 views, 42,974 likes, 2,910 reposts, 807 replies (at fetch time)Media: video poster

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  1. Model releases 132 days after the cutoff

    Anthropic releases Claude Fable 5.2 and Claude Mythos 5.2