{"type":"post","id":"claude-fable-5-2-takes-1-on-the-67e6f8","slug":"claude-fable-5-2-takes-1-on-the-67e6f8","title":"Claude Fable 5.2 takes #1 on the Vals Index at 71.31% accuracy","description":"Vals AI reports that Claude Fable 5.2 ranked first among 36 models on its Vals Index v2.2, scoring 71.31% at a listed test cost of $17.94.","retrieval_nugget":"Vals AI reports that Claude Fable 5.2 ranked first among 36 models on its Vals Index v2.2, scoring 71.31% at a listed test cost of $17.94. The result is a useful, task-specific snapshot for builders comparing models, but its uneven benchmark results argue against treating one aggregate rank as a general capability verdict.","published_at":"2026-11-10","updated_at":"2026-11-10","record_date":"2026-11-10","date_kind":"published_at","topics":["claude","anthropic","gemini"],"entities":["Vals AI","Claude Fable 5.2","Anthropic","Claude Sonnet 5.5","Gemini 4 Carbon","Claude Opus 5.5","GPT-6 Astra"],"related_patterns":["agent-economics-moves-to-completed-work"],"novelty_label":"new_fact","what_changed":"Claude Fable 5.2 ranks first on the Vals Index with 71.31% accuracy, a separate benchmark result from its Epoch Capabilities Index score.","prior_refs":["https://newruntime.com/posts/claude-fable-5-2-scored-174-on-the-2701ba/"],"source_url":"https://www.vals.ai/models/anthropic_claude-fable-5-2","source_urls":["https://www.vals.ai/models/anthropic_claude-fable-5-2"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:claude-fable-5-2-takes-1-on-the-67e6f8","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/claude-fable-5-2-takes-1-on-the-67e6f8/","markdown":"https://newruntime.com/posts/claude-fable-5-2-takes-1-on-the-67e6f8.md","json":"https://newruntime.com/posts/claude-fable-5-2-takes-1-on-the-67e6f8.json"},"markdown_url":"https://newruntime.com/posts/claude-fable-5-2-takes-1-on-the-67e6f8.md","next_reads":[{"type":"topic","path":"/topics/claude/","url":"https://newruntime.com/topics/claude/","title":"Claude","reason":"Explore the claude topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude.md","json_url":"https://newruntime.com/topics/claude.json"},{"type":"topic","path":"/topics/anthropic/","url":"https://newruntime.com/topics/anthropic/","title":"Anthropic","reason":"Explore the anthropic topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/anthropic.md","json_url":"https://newruntime.com/topics/anthropic.json"},{"type":"topic","path":"/topics/gemini/","url":"https://newruntime.com/topics/gemini/","title":"Gemini","reason":"Explore the gemini topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/gemini.md","json_url":"https://newruntime.com/topics/gemini.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/sources/","url":"https://newruntime.com/sources/","title":"Sources","reason":"See the original sources this archive cites.","media_type":"text/html"}]}