Grok 3 Mini Beta vs OpenAI o3

Compare Grok 3 Mini Beta by xAI against OpenAI o3 by OpenAI, in 1 community votes, openai o3 wins 100% of head-to-head duels, tested across 13 shared challenges. Updated March 2026.

Which is better, Grok 3 Mini Beta or OpenAI o3?

OpenAI o3 is the better choice overall, winning 100% of 1 blind community votes on Rival. Grok 3 Mini Beta costs $0.4/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.

Key Differences Between Grok 3 Mini Beta and OpenAI o3

Grok 3 Mini Beta is made by xai while OpenAI o3 is from openai. On pricing, Grok 3 Mini Beta costs $0.4/M input tokens vs $10/M for OpenAI o3. In community voting, In 1 community votes, OpenAI o3 wins 100% of head-to-head duels.

In 1 community votes, OpenAI o3 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 1+ human preference judgments for this pair.

Our Verdict
OpenAI o3
OpenAI o3Winner
Grok 3 Mini Beta
Grok 3 Mini BetaRunner-up

Pick OpenAI o3. In 1 blind votes, OpenAI o3 wins 100% of the time. That's not luck.

Grok 3 Mini Beta is 50x cheaper per token — worth considering if cost matters.

Clear winner
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