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 69. 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 42.8. The single biggest benchmark swing on the page is LiveCodeBench, 80 to 37.
GPT-5.3-Codex-Spark gives you the larger context window at 256K, compared with 128K for GPT-5 mini.
Pick GPT-5.3-Codex-Spark if you want the stronger benchmark profile. GPT-5 mini only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
GPT-5.3-Codex-Spark
85.6
GPT-5 mini
65.7
GPT-5.3-Codex-Spark
82.3
GPT-5 mini
42.8
GPT-5.3-Codex-Spark
88.3
GPT-5 mini
83.8
GPT-5.3-Codex-Spark
92.7
GPT-5 mini
81.8
GPT-5.3-Codex-Spark
78.3
GPT-5 mini
62.8
GPT-5.3-Codex-Spark
92
GPT-5 mini
82
GPT-5.3-Codex-Spark
90.8
GPT-5 mini
80.1
GPT-5.3-Codex-Spark
96.7
GPT-5 mini
87.2
GPT-5.3-Codex-Spark is ahead overall, 87 to 69. The biggest single separator in this matchup is LiveCodeBench, where the scores are 80 and 37.
GPT-5.3-Codex-Spark has the edge for knowledge tasks in this comparison, averaging 78.3 versus 62.8. 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 42.8. 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 87.2. Inside this category, MATH-500 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 81.8. 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 65.7. Inside this category, OSWorld-Verified 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 83.8. 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 82. 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 80.1. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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