Anthropic Claude Dominates April AI Rankings as OpenAI Loses Ground
Anthropic holds 77-82 cents across both Polymarket and Kalshi for 'best AI model in April' while OpenAI dropped 4 cents to just 23 cents. GPT-5.5 confirmed released at 98 cents but apparently insufficient to displace Claude. The AI model race has major implications for enterprise software valuations.
Key takeaways
- 01
Anthropic holds 77-82 cents across both Polymarket and Kalshi for 'best AI model in April' while OpenAI dropped 4 cents to just 23 cents.
- 02
GPT-5.5 confirmed released at 98 cents but apparently insufficient to displace Claude.
- 03
The AI model race has major implications for enterprise software valuations.
Full analysis
Today's AI market data presents a clear and tradeable narrative: Anthropic Claude is the consensus winner of April's AI model rankings, and markets are confirming this with significant volume and directional moves.
On Kalshi, KXLLM1-26APR25-ANTH (Best AI in Apr 2026 — Anthropic) sits at 82 cents with $249,836 in volume and a 1-cent spread — the tightest and most liquid AI model market available. The OpenAI equivalent (KXLLM1-26APR25-OPEN) is at just 17 cents.
On Polymarket, the 'Anthropic' contract (0x6ac0f239c53763cc90) surged 6 cents to 77 cents on $124k volume, while 'OpenAI' (0xf105ea1a8360554061) dropped 4 cents to 23 cents on massive $396k volume — the high volume on OpenAI's drop suggests institutional sellers moving out of that position.
Most notably, GPT-5.5's release by April 23 (0x3de1a705488234aeb8) is priced at 93 cents (+5) — meaning GPT-5.5 has almost certainly been released, yet it failed to push OpenAI back to the top of the rankings. This suggests Claude's lead is substantial on whatever benchmark these markets use (likely LMSYS/Chatbot Arena).
DeepSeek V4 by April 24 (0x52eac6d8a04d9e66bb) sits at 45 cents — coin flip for a major release. If DeepSeek releases before month end, expect further pressure on OpenAI.
For traders: the KXLLM1 June contract (KXLLM1-26DEC31-A at 55 cents for Anthropic) represents a longer-dated bet on Anthropic maintaining dominance. The 'Which company has best AI model end of June?: Anthropic' (0xa4d72632ac0ddadcac) at 51 cents offers a discounted entry point on the same thesis.
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