Anthropic holds an 82.5% market-implied probability of fielding the top LiveBench coding model by end of November, driven by its Claude Opus 5.5 and Fable 5 variants posting leading scores above 86% on recent coding suites that emphasize contamination-resistant programming tasks in Python, JavaScript, and TypeScript. These results reflect Anthropic’s focused scaling on agentic coding workflows and high-effort reasoning modes, outpacing OpenAI’s GPT-5.x Codex entries and Google’s Gemini updates in head-to-head evaluations as of mid-October. Traders note limited near-term catalysts for rivals, with new model drops from OpenAI or DeepSeek unlikely to close the gap before the resolution window, though any surprise release or benchmark refresh could introduce volatility.