Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
GPT-5.3 Instant is clearly ahead on the aggregate, 87 to 61. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.3 Instant's sharpest advantage is in multimodal & grounded, where it averages 95 against 60.4. The single biggest benchmark swing on the page is MMMU-Pro, 95 to 55.
GPT-5.3 Instant is also the more expensive model on tokens at $1.75 input / $14.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Nemotron 3 Super 120B A12B. That is roughly Infinityx on output cost alone. GPT-5.3 Instant is the reasoning model in the pair, while Nemotron 3 Super 120B A12B 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. Nemotron 3 Super 120B A12B gives you the larger context window at 256K, compared with 128K for GPT-5.3 Instant.
Pick GPT-5.3 Instant if you want the stronger benchmark profile. Nemotron 3 Super 120B A12B only becomes the better choice if you want the cheaper token bill or you need the larger 256K context window.
GPT-5.3 Instant
82.9
Nemotron 3 Super 120B A12B
55.3
GPT-5.3 Instant
78.7
Nemotron 3 Super 120B A12B
44.2
GPT-5.3 Instant
95
Nemotron 3 Super 120B A12B
60.4
GPT-5.3 Instant
94.2
Nemotron 3 Super 120B A12B
71.8
GPT-5.3 Instant
80.8
Nemotron 3 Super 120B A12B
55.8
GPT-5.3 Instant
96
Nemotron 3 Super 120B A12B
86
GPT-5.3 Instant
93.4
Nemotron 3 Super 120B A12B
81.5
GPT-5.3 Instant
97.2
Nemotron 3 Super 120B A12B
74.6
GPT-5.3 Instant is ahead overall, 87 to 61. The biggest single separator in this matchup is MMMU-Pro, where the scores are 95 and 55.
GPT-5.3 Instant has the edge for knowledge tasks in this comparison, averaging 80.8 versus 55.8. Inside this category, MMLU is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for coding in this comparison, averaging 78.7 versus 44.2. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for math in this comparison, averaging 97.2 versus 74.6. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for reasoning in this comparison, averaging 94.2 versus 71.8. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for agentic tasks in this comparison, averaging 82.9 versus 55.3. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for multimodal and grounded tasks in this comparison, averaging 95 versus 60.4. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for instruction following in this comparison, averaging 96 versus 86. Inside this category, IFEval is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for multilingual tasks in this comparison, averaging 93.4 versus 81.5. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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