Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.3 Codex
87
MiMo-V2-Omni
83
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 is clearly ahead on the provisional aggregate, 87 to 83. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
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, 87 to 83. 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, SWE-bench Verified is the benchmark that creates the most daylight between them.
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