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 53. 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 24.7. The single biggest benchmark swing on the page is LiveCodeBench, 80 to 21.
GPT-5.3-Codex-Spark is also the more expensive model on tokens at $2.00 input / $8.00 output per 1M tokens, versus $0.10 input / $0.40 output per 1M tokens for Seed-2.0-Mini. That is roughly 20.0x on output cost alone. GPT-5.3-Codex-Spark is the reasoning model in the pair, while Seed-2.0-Mini 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.
Pick GPT-5.3-Codex-Spark if you want the stronger benchmark profile. Seed-2.0-Mini only becomes the better choice if you want the cheaper token bill or you would rather avoid the extra latency and token burn of a reasoning model.
GPT-5.3-Codex-Spark
85.6
Seed-2.0-Mini
46.2
GPT-5.3-Codex-Spark
82.3
Seed-2.0-Mini
24.7
GPT-5.3-Codex-Spark
88.3
Seed-2.0-Mini
73.1
GPT-5.3-Codex-Spark
92.7
Seed-2.0-Mini
64.8
GPT-5.3-Codex-Spark
78.3
Seed-2.0-Mini
44.6
GPT-5.3-Codex-Spark
92
Seed-2.0-Mini
80
GPT-5.3-Codex-Spark
90.8
Seed-2.0-Mini
71.8
GPT-5.3-Codex-Spark
96.7
Seed-2.0-Mini
65.1
GPT-5.3-Codex-Spark is ahead overall, 87 to 53. The biggest single separator in this matchup is LiveCodeBench, where the scores are 80 and 21.
GPT-5.3-Codex-Spark has the edge for knowledge tasks in this comparison, averaging 78.3 versus 44.6. 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 24.7. 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 65.1. 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 64.8. Inside this category, SimpleQA 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 46.2. 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 73.1. Inside this category, OfficeQA 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 80. 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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