Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.3 Codex
87
MiMo-V2-Pro
83
Pick GPT-5.3 Codex if you want the stronger benchmark profile. MiMo-V2-Pro only becomes the better choice if coding is the priority or you need the larger 1M context window.
Coding
+14.9 difference
GPT-5.3 Codex
MiMo-V2-Pro
$1.75 / $14
N/A
79 t/s
N/A
88.26s
N/A
400K
1M
Pick GPT-5.3 Codex if you want the stronger benchmark profile. MiMo-V2-Pro only becomes the better choice if coding is the priority or you need the larger 1M context window.
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.
MiMo-V2-Pro gives you the larger context window at 1M, compared with 400K for GPT-5.3 Codex.
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 78%.
MiMo-V2-Pro has the edge for coding in this comparison, averaging 78 versus 63.1. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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