Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
DeepSeek V4 Flash (Max)
77
GPT-5.2
82
Verified leaderboard positions: DeepSeek V4 Flash (Max) #12 · GPT-5.2 unranked
Pick GPT-5.2 if you want the stronger benchmark profile. DeepSeek V4 Flash (Max) only becomes the better choice if coding is the priority or you want the cheaper token bill.
Agentic
+8.1 difference
Coding
+9.0 difference
Knowledge
+32.4 difference
DeepSeek V4 Flash (Max)
GPT-5.2
$0.14 / $0.28
$1.75 / $14
N/A
73 t/s
N/A
130.34s
1M
400K
Pick GPT-5.2 if you want the stronger benchmark profile. DeepSeek V4 Flash (Max) only becomes the better choice if coding is the priority or you want the cheaper token bill.
GPT-5.2 is clearly ahead on the provisional aggregate, 82 to 77. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.2's sharpest advantage is in knowledge, where it averages 92.4 against 60. The single biggest benchmark swing on the page is BrowseComp, 73.2% to 65.8%. DeepSeek V4 Flash (Max) does hit back in coding, so the answer changes if that is the part of the workload you care about most.
GPT-5.2 is also the more expensive model on tokens at $1.75 input / $14.00 output per 1M tokens, versus $0.14 input / $0.28 output per 1M tokens for DeepSeek V4 Flash (Max). That is roughly 50.0x on output cost alone. DeepSeek V4 Flash (Max) gives you the larger context window at 1M, compared with 400K for GPT-5.2.
GPT-5.2 is ahead on BenchLM's provisional leaderboard, 82 to 77. The biggest single separator in this matchup is BrowseComp, where the scores are 73.2% and 65.8%.
GPT-5.2 has the edge for knowledge tasks in this comparison, averaging 92.4 versus 60. Inside this category, GPQA is the benchmark that creates the most daylight between them.
DeepSeek V4 Flash (Max) has the edge for coding in this comparison, averaging 73.7 versus 64.7. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.
DeepSeek V4 Flash (Max) has the edge for agentic tasks in this comparison, averaging 63.3 versus 55.2. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.
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