{"slug": "anthropic-s-claude-fable-5-1-promises-better-coding-and-research-at-up-to-45", "title": "Anthropic's Claude Fable 5.1 promises better coding and research at up to 45 percent less", "summary": "Anthropic launched Claude Fable 5.1 and Mythos 5.1, its most capable AI models, with Fable 5.1 doubling its predecessor's score on Terminal-Bench-Science and improving agentic coding by over 30 percent while cutting costs by up to 45 percent for long, autonomous runs with many tool calls.", "body_md": "# Anthropic's Claude Fable 5.1 promises better coding and research at up to 45 percent less\n\nBy Matthias BastianSource:\n\n[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.\n\nThe 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).\n\nGet AI news in your inbox\n\nDaily digest of what matters in AI.", "url": "https://wpnews.pro/news/anthropic-s-claude-fable-5-1-promises-better-coding-and-research-at-up-to-45", "canonical_source": "https://www.machinebrief.com/news/anthropics-claude-fable-51-promises-better-coding-and-resear-x5zo", "published_at": "2026-09-01 20:01:55+00:00", "updated_at": "2026-09-01 20:25:01.993929+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-products"], "entities": ["Anthropic", "Claude Fable 5.1", "Mythos 5.1", "Terminal-Bench-Science"], "alternates": {"html": "https://wpnews.pro/news/anthropic-s-claude-fable-5-1-promises-better-coding-and-research-at-up-to-45", "markdown": "https://wpnews.pro/news/anthropic-s-claude-fable-5-1-promises-better-coding-and-research-at-up-to-45.md", "text": "https://wpnews.pro/news/anthropic-s-claude-fable-5-1-promises-better-coding-and-research-at-up-to-45.txt", "jsonld": "https://wpnews.pro/news/anthropic-s-claude-fable-5-1-promises-better-coding-and-research-at-up-to-45.jsonld"}}