Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.3 Codex
85
MiMo-V2-Omni
84
Pick GPT-5.3 Codex if you want the stronger benchmark profile. MiMo-V2-Omni only becomes the better choice if coding is the priority.
Coding
+11.7 difference
GPT-5.3 Codex
MiMo-V2-Omni
$1.75 / $14
N/A
79 t/s
N/A
88.26s
N/A
400K
262K
Pick GPT-5.3 Codex if you want the stronger benchmark profile. MiMo-V2-Omni only becomes the better choice if coding is the priority.
GPT-5.3 Codex finishes one point ahead on BenchLM's provisional leaderboard, 85 to 84. That is enough to call, but not enough to treat as a blowout. This matchup comes down to a few meaningful edges rather than one model dominating the board.
GPT-5.3 Codex gives you the larger context window at 400K, compared with 262K for MiMo-V2-Omni.
GPT-5.3 Codex is ahead on BenchLM's provisional leaderboard, 85 to 84. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 85% and 74.8%.
MiMo-V2-Omni has the edge for coding in this comparison, averaging 74.8 versus 63.1. Inside this category, Terminal-Bench Hard is the benchmark that creates the most daylight between them.
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