Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.4
93
MiMo-V2-Flash
62
Verified leaderboard positions: GPT-5.4 #4 · MiMo-V2-Flash unranked
Pick GPT-5.4 if you want the stronger benchmark profile. MiMo-V2-Flash only becomes the better choice if coding is the priority or you want the cheaper token bill.
Coding
+15.7 difference
Knowledge
+8.3 difference
GPT-5.4
MiMo-V2-Flash
$2.5 / $15
$0 / $0
74 t/s
129 t/s
151.79s
2.14s
1.05M
256K
Pick GPT-5.4 if you want the stronger benchmark profile. MiMo-V2-Flash only becomes the better choice if coding is the priority or you want the cheaper token bill.
GPT-5.4 is clearly ahead on the provisional aggregate, 93 to 62. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.4's sharpest advantage is in knowledge, where it averages 92.8 against 84.5. The single biggest benchmark swing on the page is GPQA, 92.8% to 83.7%. MiMo-V2-Flash does hit back in coding, so the answer changes if that is the part of the workload you care about most.
GPT-5.4 is also the more expensive model on tokens at $2.50 input / $15.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for MiMo-V2-Flash. That is roughly Infinityx on output cost alone. GPT-5.4 gives you the larger context window at 1.05M, compared with 256K for MiMo-V2-Flash.
GPT-5.4 is ahead on BenchLM's provisional leaderboard, 93 to 62. The biggest single separator in this matchup is GPQA, where the scores are 92.8% and 83.7%.
GPT-5.4 has the edge for knowledge tasks in this comparison, averaging 92.8 versus 84.5. Inside this category, GPQA is the benchmark that creates the most daylight between them.
MiMo-V2-Flash has the edge for coding in this comparison, averaging 73.4 versus 57.7. GPT-5.4 stays close enough that the answer can still flip depending on your workload.
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