GPT-4o (Omni) vs Inception: Mercury

Compare GPT-4o (Omni) by OpenAI against Inception: Mercury by Inception, in 9 community votes, gpt-4o (omni) and inception: mercury are closely matched, context windows of 128K vs 32K, tested across 30 shared challenges. Updated February 2026.

In 9 community votes, GPT-4o (Omni) and Inception: Mercury are closely matched. GPT-4o (Omni) leads in Image Generation, while Inception: Mercury leads in Web Design. Based on blind community voting from the RIVAL open dataset of 9+ human preference judgments for this pair.

Image Generation: GPT-4o (Omni) wins 67% of votes
Web Design: Inception: Mercury wins 67% of votes
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