Inception: Mercury vs OpenAI o3

Compare Inception: Mercury by Inception against OpenAI o3 by OpenAI, in 3 community votes, openai o3 wins 100% of head-to-head duels, tested across 31 shared challenges. Updated February 2026.

In 3 community votes, OpenAI o3 wins 100% of head-to-head duels. OpenAI o3 leads in Image Generation. Based on blind community voting from the RIVAL open dataset of 3+ human preference judgments for this pair.

Image Generation: OpenAI o3 wins 100% of votes
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