{"slug": "anthropic-releases-fable-5-1-and-mythos-5-1-with-reduced-token-costs-and-fewer", "title": "Anthropic releases Fable 5.1 and Mythos 5.1 with reduced token costs and fewer safety false positives", "summary": "Anthropic released Fable 5.1 and Mythos 5.1, with Fable 5.1 cutting token costs by 25% and up to 45% for agentic tasks, while Mythos 5.1 offers stronger performance and fewer false-positive safety restrictions, addressing customer complaints about pricing and overzealous safeguards.", "body_md": "# Anthropic releases Fable 5.1 and Mythos 5.1 with reduced token costs and fewer safety false positives\n\nAccording to TechCrunch, Anthropic released Fable 5.1 with 25% lower token costs and up to 45% reduction for agentic tasks, and Mythos 5.1 with stronger performance and fewer false-positive safety restrictions. The releases address customer complaints about pricing and overzealous safeguards in prior versions.\n\n## Topics\n\n## Sources\n\n- Press\n[Read article](https://techcrunch.com/2026/09/01/anthropics-new-fable-release-is-cheaper-less-restrictive/) - Press\n[Read article](https://www.theverge.com/ai-artificial-intelligence/987830/anthropic-claude-fable-mythos-5-1)\n\n## Go deeper\n\nThis intelligence is sourced automatically from public sources across the web and synthesised by the Prefactor AI pipeline. Stories are reviewed before publication.", "url": "https://wpnews.pro/news/anthropic-releases-fable-5-1-and-mythos-5-1-with-reduced-token-costs-and-fewer", "canonical_source": "https://www.getreadyforagents.com/news/anthropic-fable-mythos-5-1-release/", "published_at": "2026-09-02 20:05:11+00:00", "updated_at": "2026-09-02 20:23:16.220189+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-products"], "entities": ["Anthropic", "Fable 5.1", "Mythos 5.1", "TechCrunch"], "alternates": {"html": "https://wpnews.pro/news/anthropic-releases-fable-5-1-and-mythos-5-1-with-reduced-token-costs-and-fewer", "markdown": "https://wpnews.pro/news/anthropic-releases-fable-5-1-and-mythos-5-1-with-reduced-token-costs-and-fewer.md", "text": "https://wpnews.pro/news/anthropic-releases-fable-5-1-and-mythos-5-1-with-reduced-token-costs-and-fewer.txt", "jsonld": "https://wpnews.pro/news/anthropic-releases-fable-5-1-and-mythos-5-1-with-reduced-token-costs-and-fewer.jsonld"}}