Summary
Anthropic released Claude Fable 5.2 on November 9, and this video from TheAIGRID breaks down what the model can do and why it has generated so much reaction online.
The video explains how Fable 5.2 relates to its sister model Claude Mythos 5.2: they share the same underlying model, with Fable carrying stronger safeguards around cybersecurity and biology so it can be released broadly. Pricing is $8 per million input tokens and $40 per million output tokens, down from $10 and $50 for Fable 5.1, with output up to 30% faster and an optional fast mode. Anthropic also positions the model as an adviser to smaller models and as an orchestrator that delegates to cheaper ones.
Benchmark results covered include the number one spot on the Vals Index at 71.31%, 97.7% on ARC-AGI-3 with a provider harness (81.2% with the standard harness), 93.8% on ARC-AGI-2, a record 174 on the Epoch Capabilities Index, and 89.3% on OSWorld.
The second half looks at headline demonstrations: an operating system built by coordinating over 1,000 agents across eight days, hardware designed from a single paragraph of text, two open problems in black hole physics, and a formalization of Fermat’s Last Theorem in 30 hours.
📺 Source: TheAIGRID · Published November 10, 2026
🏷️ Format: News Analysis
