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Meta will not have the top spot on the arena.ai Code Arena | WebDev Leaderboard when checked on October 31, 2026. As of October 2, 2026, Meta’s muse-spark-1.3-max sits 10th with a score of 1656+9/-9, with 5,945 votes and a 1M context window. Anthropic’s claude-opus-5.5-max is ranked first with 1827…