Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
DeepSeek V4 Pro (Max)
87
GPT-5.3 Codex
86
Verified leaderboard positions: DeepSeek V4 Pro (Max) #4 · GPT-5.3 Codex unranked
Pick DeepSeek V4 Pro (Max) if you want the stronger benchmark profile. GPT-5.3 Codex only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Agentic
+2.5 difference
Coding
+12.8 difference
DeepSeek V4 Pro (Max)
GPT-5.3 Codex
$1.74 / $3.48
$1.75 / $14
N/A
79 t/s
N/A
88.26s
1M
400K
Pick DeepSeek V4 Pro (Max) if you want the stronger benchmark profile. GPT-5.3 Codex only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
DeepSeek V4 Pro (Max) finishes one point ahead on BenchLM's provisional leaderboard, 87 to 86. That is enough to call, but not enough to treat as a blowout. This matchup comes down to a few meaningful edges rather than one model dominating the board.
DeepSeek V4 Pro (Max)'s sharpest advantage is in coding, where it averages 75.9 against 63.1. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 67.9% to 77.3%.
GPT-5.3 Codex is also the more expensive model on tokens at $1.75 input / $14.00 output per 1M tokens, versus $1.74 input / $3.48 output per 1M tokens for DeepSeek V4 Pro (Max). That is roughly 4.0x on output cost alone. DeepSeek V4 Pro (Max) gives you the larger context window at 1M, compared with 400K for GPT-5.3 Codex.
DeepSeek V4 Pro (Max) is ahead on BenchLM's provisional leaderboard, 87 to 86. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 67.9% and 77.3%.
DeepSeek V4 Pro (Max) has the edge for coding in this comparison, averaging 75.9 versus 63.1. Inside this category, Vibe Code Bench is the benchmark that creates the most daylight between them.
DeepSeek V4 Pro (Max) has the edge for agentic tasks in this comparison, averaging 74 versus 71.5. Inside this category, GDPval-AA is the benchmark that creates the most daylight between them.
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