In the News: September 1, 2026
Anthropic cut Claude Fable 5.1's cache-read price 75 percent, and Cognition says it is moving Devin's Opus 5 traffic to the new model on launch day.
Extra edition
Machine-readable
Download Markdown
Story
Claude Fable 5.1 cuts agentic-workload cost by up to 45 percent, and Cognition is moving production traffic to it
Anthropic released Claude Fable 5.1 today, generally available on all platforms, alongside Claude Mythos 5.1, a restricted-access variant for vetted cybersecurity and life-sciences work. Cache reads, where the model reuses context it has…
Read story →