Anthropic released Claude Fable 5.2 on November 9, 2026, the latest in its Mythos-class frontier large language model series, immediately posting a 74.2% score on Humanity’s Last Exam with tools—well above the 50% debut threshold. This continues the model line’s steady gains, from Fable 5’s 53% in June to Fable 5.1’s 65% in September, driven by improvements in reasoning, coding, and agentic workflows that also beat Opus 5.5 on most independent benchmarks. Traders see the unbroken upward trajectory, lower pricing at $8/$40 per million tokens, and rapid deployment across Claude apps and APIs as locking in strong consensus for a YES outcome, though last-minute benchmark adjustments or resolution criteria remain minor swing factors.