Anthropic released Fable 5.1 and Mythos 5.1 on Tuesday, with the unrestricted Fable version now available on cloud platforms and via the Anthropic API, while Mythos remains limited to registered partn…
Anthropic released Claude Fable 5.1, an upgrade to its most capable AI model, claiming higher performance on coding and problem-solving tasks and up to 45% cost savings for agentic workloads. The comp…
Anthropic released Fable 5.1, a new AI model that sets a standard on benchmarks, scoring 52.6% on Terminal-Bench-Science 0.1 (more than double Fable 5) and 55.8% on Terminal-Bench 4.0 versus 42.0% for…
An analysis of the Claude Code 2.1.257 binary reveals a new 'Fable 5.1 prompt bundle' capability assigned to Anthropic's Fable 5.1 and Mythos 5.1 models, which share the same underlying model. The bun…
CodeRabbit's review of Fable 5.1 found that the coding agent improved precision by 4.5 percentage points to 37.3% and cut total review comments by 87 to 166, but recall dipped 1.0 point to 61.0% and l…