Anthropic Leads AI Model Race as Markets Favor Claude for May
The 'Best AI in May 2026' market on Kalshi shows Anthropic's Claude at 97¢, completely dominating OpenAI's GPT at 1¢. The Gemini 3.5 release probability surged 9¢ to 27¢, suggesting new information about Google's roadmap. These markets are pricing in a clear hierarchy: Anthropic leads, Google is gaining, and OpenAI is surprisingly behind.
Key takeaways
- 01
The 'Best AI in May 2026' market on Kalshi shows Anthropic's Claude at 97¢, completely dominating OpenAI's GPT at 1¢.
- 02
The Gemini 3.5 release probability surged 9¢ to 27¢, suggesting new information about Google's roadmap.
- 03
These markets are pricing in a clear hierarchy: Anthropic leads, Google is gaining, and OpenAI is surprisingly behind.
Full analysis
AI model ranking markets are providing a real-time snapshot of the competitive landscape, and the picture is stark. On Kalshi, the 'Best AI in May 2026' market (KXLLM1-26MAY31-A) shows Anthropic's Claude at 97¢, implying near-certain dominance for the month. OpenAI trails at 1¢ on the same market (KXLLM1-26MAY09-OPEN), while Google sits at 2¢ (KXLLM1-26MAY09-GOOG). The longer-dated December 2026 market (KXLLM1-26DEC31-A) shows Anthropic still leading at 58¢, with Google at 21¢ and OpenAI at 15¢.
The most notable mover today is the Gemini 3.5 release market (0x4370803e1beb74348c), which gained 9¢ to 27¢. This suggests new information has entered the market about Google's next-generation model, potentially from a leaked benchmark or announcement. If Google can ship a compelling GPT-4 class model, it could reshape the competitive dynamics.
On Polymarket, the 'best AI model end of May' market (0x5072d0bf27763754b7) shows Anthropic leading at 76¢, with Google at 23¢ (0x2ae22e1fd29651ed6f), and OpenAI at 3¢ (0xc6176e61dc008476c1). The 'end of June' market (0xa4d72632ac0ddadcac) shows Anthropic at 65¢ and Google at 28¢ (0x0bd1b836a2494f80aa), suggesting Google is expected to narrow the gap.
For AI traders, the key question is whether Anthropic's lead is sustainable. The market is pricing in high conviction, but the history of AI is one of rapid regime changes. The Gemini 3.5 release contract offers asymmetric upside if Google delivers. Traders should also watch for any announcements from xAI (Grok) and DeepSeek, which are priced at 0¢ but could surprise.
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