Anthropic holds a commanding 93% market-implied probability for the best Code Arena WebDev AI model by end of October because its Claude Opus 5.5 (Max) and supporting models currently occupy the top leaderboard spots on arena.ai, scoring above 1800 in community-voted evaluations of agentic frontend coding, multi-step reasoning, and tool use. Recent September and October updates strengthened long-context handling and workflow efficiency, widening the gap over OpenAI’s GPT-6 variants and other competitors. With resolution just days away, traders see limited room for reversal unless a major new release from another lab quickly surpasses these scores in the final voting window.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedView resolved

















Beware of external links.
Beware of external links.
Frequently Asked Questions