# Anthropic's Claude Fable 5.1 promises better coding and research at up to 45 percent less > Source: > Published: 2026-09-01 20:01:55+00:00 # Anthropic's Claude Fable 5.1 promises better coding and research at up to 45 percent less By Matthias BastianSource: [The Decoder](https://the-decoder.com) [Anthropic](/glossary/anthropic) launches [Claude](/glossary/claude) Fable 5.1 and Mythos 5.1, its most capable AI models yet. Fable 5.1 doubles its predecessor's score on Terminal-Bench-Science and improves agentic coding by over 30 percent. Costs drop by up to 45 percent for long, autonomous runs with many tool calls. The article [Anthropic's Claude Fable 5.1 promises better coding and research at up to 45 percent less](https://the-decoder.com/anthropics-claude-fable-5-1-promises-better-coding-and-research-at-up-to-45-percent-less/) appeared first on [The Decoder](https://the-decoder.com). Get AI news in your inbox Daily digest of what matters in AI.