Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
GPT-5.3-Codex-Spark is clearly ahead on the aggregate, 87 to 45. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.3-Codex-Spark's sharpest advantage is in coding, where it averages 82.3 against 22. The single biggest benchmark swing on the page is LiveCodeBench, 80 to 16.
GPT-5.3-Codex-Spark is the reasoning model in the pair, while Nemotron 3 Nano 30B 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-5.3-Codex-Spark gives you the larger context window at 256K, compared with 32K for Nemotron 3 Nano 30B.
Pick GPT-5.3-Codex-Spark if you want the stronger benchmark profile. Nemotron 3 Nano 30B only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.
GPT-5.3-Codex-Spark
85.6
Nemotron 3 Nano 30B
39.6
GPT-5.3-Codex-Spark
82.3
Nemotron 3 Nano 30B
22
GPT-5.3-Codex-Spark
88.3
Nemotron 3 Nano 30B
45.2
GPT-5.3-Codex-Spark
92.7
Nemotron 3 Nano 30B
54
GPT-5.3-Codex-Spark
78.3
Nemotron 3 Nano 30B
43.8
GPT-5.3-Codex-Spark
92
Nemotron 3 Nano 30B
78
GPT-5.3-Codex-Spark
90.8
Nemotron 3 Nano 30B
71.8
GPT-5.3-Codex-Spark
96.7
Nemotron 3 Nano 30B
63.7
GPT-5.3-Codex-Spark is ahead overall, 87 to 45. The biggest single separator in this matchup is LiveCodeBench, where the scores are 80 and 16.
GPT-5.3-Codex-Spark has the edge for knowledge tasks in this comparison, averaging 78.3 versus 43.8. Inside this category, HLE is the benchmark that creates the most daylight between them.
GPT-5.3-Codex-Spark has the edge for coding in this comparison, averaging 82.3 versus 22. Inside this category, LiveCodeBench is the benchmark that creates the most daylight between them.
GPT-5.3-Codex-Spark has the edge for math in this comparison, averaging 96.7 versus 63.7. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
GPT-5.3-Codex-Spark has the edge for reasoning in this comparison, averaging 92.7 versus 54. Inside this category, MRCRv2 is the benchmark that creates the most daylight between them.
GPT-5.3-Codex-Spark has the edge for agentic tasks in this comparison, averaging 85.6 versus 39.6. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
GPT-5.3-Codex-Spark has the edge for multimodal and grounded tasks in this comparison, averaging 88.3 versus 45.2. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
GPT-5.3-Codex-Spark has the edge for instruction following in this comparison, averaging 92 versus 78. Inside this category, IFEval is the benchmark that creates the most daylight between them.
GPT-5.3-Codex-Spark has the edge for multilingual tasks in this comparison, averaging 90.8 versus 71.8. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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