GPT-5.1 vs Kimi K2

Compare GPT-5.1 by OpenAI against Kimi K2 by Moonshot AI, in 4 community votes, gpt-5.1 wins 75% of head-to-head duels, tested across 34 shared challenges. Updated February 2026.

In 4 community votes, GPT-5.1 wins 75% of head-to-head duels. GPT-5.1 has the edge overall, but performance varies by task type. Based on blind community voting from the RIVAL open dataset of 4+ human preference judgments for this pair.