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 43. 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 coding, where it averages 78.7 against 21.5. The single biggest benchmark swing on the page is SWE-bench Verified, 76 to 17.
GPT-5.3 Instant is also the more expensive model on tokens at $1.75 input / $14.00 output per 1M tokens, versus $0.55 input / $2.19 output per 1M tokens for DeepSeek-R1. That is roughly 6.4x on output cost alone.
Pick GPT-5.3 Instant if you want the stronger benchmark profile. DeepSeek-R1 only becomes the better choice if you want the cheaper token bill.
GPT-5.3 Instant
82.9
DeepSeek-R1
44.5
GPT-5.3 Instant
78.7
DeepSeek-R1
21.5
GPT-5.3 Instant
95
DeepSeek-R1
47.5
GPT-5.3 Instant
94.2
DeepSeek-R1
50.9
GPT-5.3 Instant
80.8
DeepSeek-R1
37.9
GPT-5.3 Instant
96
DeepSeek-R1
69
GPT-5.3 Instant
93.4
DeepSeek-R1
60.4
GPT-5.3 Instant
97.2
DeepSeek-R1
52.5
GPT-5.3 Instant is ahead overall, 87 to 43. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 76 and 17.
GPT-5.3 Instant has the edge for knowledge tasks in this comparison, averaging 80.8 versus 37.9. 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 21.5. Inside this category, SWE-bench Verified 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 52.5. 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 50.9. 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 44.5. 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 47.5. 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 69. 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 60.4. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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