6 September 2026

Anthropic releases new Claude models with cost cuts and hardware control

First reported

Deep Learning Weekly ran this on , 2 days before the next source picked it up.

  • Anthropic released Claude Fable 5.1 and Mythos 5.1, reducing the cost to reuse cached text from $1 per million tokens to $0.25.
  • Claude's science benchmark score more than doubled to 52.6 on Terminal-Bench-Science, a test measuring reasoning on scientific problems.

Where they differ