What changed in AI.

Market developments ordered by event date, with direct evidence. Site maintenance has its own publishing log.

Market developments · 16

Sep 1, 2026Anthropicmodel release

Anthropic releases Fable and Mythos 5.1

Anthropic released Claude Fable 5.1 and restricted-access Claude Mythos 5.1 for advanced coding, knowledge work, long-running problem solving, and scientific research.

Anthropic · Read source ↗Added to map Sep 1, 2026