Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.5
91
MiniMax M3
76
Verified leaderboard positions: GPT-5.5 #5 · MiniMax M3 #12
Pick GPT-5.5 if you want the stronger benchmark profile. MiniMax M3 only becomes the better choice if coding is the priority or you want the cheaper token bill.
Agentic
+9.6 difference
Coding
+8.4 difference
Multimodal
+5.5 difference
GPT-5.5
MiniMax M3
$5 / $30
$0.3 / $1.2
N/A
N/A
N/A
N/A
1M
1M
Pick GPT-5.5 if you want the stronger benchmark profile. MiniMax M3 only becomes the better choice if coding is the priority or you want the cheaper token bill.
GPT-5.5 is clearly ahead on the provisional aggregate, 91 to 76. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5's sharpest advantage is in agentic, where it averages 81.5 against 71.9. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 82% to 66%. MiniMax M3 does hit back in coding, so the answer changes if that is the part of the workload you care about most.
GPT-5.5 is also the more expensive model on tokens at $5.00 input / $30.00 output per 1M tokens, versus $0.30 input / $1.20 output per 1M tokens for MiniMax M3. That is roughly 25.0x on output cost alone. GPT-5.5 is the reasoning model in the pair, while MiniMax M3 is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use.
GPT-5.5 is ahead on BenchLM's provisional leaderboard, 91 to 76. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 82% and 66%.
MiniMax M3 has the edge for coding in this comparison, averaging 67 versus 58.6. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
GPT-5.5 has the edge for agentic tasks in this comparison, averaging 81.5 versus 71.9. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
GPT-5.5 has the edge for multimodal and grounded tasks in this comparison, averaging 70.4 versus 64.9. Inside this category, OfficeQA Pro is the benchmark that creates the most daylight between them.
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