{"slug": "anthropic-releases-claude-fable-5-2-at-8-40-topping-aa-index-at-65", "title": "Anthropic releases Claude Fable 5.2 at $8/$40, topping AA index at 65", "summary": "Anthropic released Claude Fable 5.2 at $8 per million input tokens and $40 per million output tokens, with the model topping the Artificial Analysis index at 65. Per-token price fell 20% from Fable 5.1, but because the model writes more tests and spawns checking subagents, GDPx cost per task rose from $67.16 to $88.15, and Artificial Analysis measured $26.54 and 46 minutes per index task, among the slowest and costliest. The release matches Claude Haiku 5.5's index score at about a third of the cost per task.", "body_md": "Per-token price fell 20% from Fable 5.1, but the model writes more tests and spawns checking subagents, so GDPx cost per task rose from $67.16 to $88.15. Artificial Analysis measured $26.54 and 46 minutes per index task, among the slowest and costliest.\nRead: Per-token price fell 20% from Fable 5.1, but the model writes more tests and spawns checking subagents, so GDPx cost per task rose from $67.16 to $88.15. Artificial Analysis measured $26.54 and 46 minutes per index task, among the slowest and costliest.\nRead: That matches Claude Haiku 5.5's index score at about a third of the cost per task. Tool calls, routing and extraction run at high volume inside agents, so the cheap tier of a multi-model stack now costs less without losing measured capability.\nRead: Small classifiers and routers now take a quarter of production traffic for about half a cent of every dollar. Amazon engineers report saving millions by replacing Sonnet 4.6 with one in a large ticketing system, so routine agent decisions are leaving frontier models.\nTry: The project reports up to 33 points higher benchmark scores at 2.7 to 5.2x lower cost after removing 136,866 lines. New defaults send runs to its cloud-hosted model and browser, so self-hosted users who upgrade without changing config move off their own setup.\nTry: Bash commands could leave the sandbox without a prompt, and MCP OAuth secrets leaked on redirects. Unattended agents rely on the sandbox and on credential handling to contain mistakes, so older versions expose both the host and connected services.\nRead: Raw FLOP/s comparisons understate newer chips for serving by a factor of about ten. Memory and interconnect set how many concurrent requests a chip handles at a given speed, so inference capacity is growing far faster than compute headline numbers show.", "url": "https://wpnews.pro/news/anthropic-releases-claude-fable-5-2-at-8-40-topping-aa-index-at-65", "canonical_source": "https://www.vibeleaderboard.ai/intel/brief/2026-11-10", "published_at": "2026-11-10 12:11:43+00:00", "updated_at": "2026-11-10 12:52:11.683286+00:00", "lang": "en", "topics": ["large-language-models", "ai-products", "artificial-intelligence", "ai-agents"], "entities": ["Anthropic", "Claude Fable 5.2", "Claude Fable 5.1", "Artificial Analysis", "GDPx", "Claude Haiku 5.5"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/anthropic-releases-claude-fable-5-2-at-8-40-topping-aa-index-at-65", "markdown": "https://wpnews.pro/news/anthropic-releases-claude-fable-5-2-at-8-40-topping-aa-index-at-65.md", "text": "https://wpnews.pro/news/anthropic-releases-claude-fable-5-2-at-8-40-topping-aa-index-at-65.txt", "jsonld": "https://wpnews.pro/news/anthropic-releases-claude-fable-5-2-at-8-40-topping-aa-index-at-65.jsonld"}}