Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.3 Codex
87
Qwen3.6 Plus
73
Verified leaderboard positions: GPT-5.3 Codex unranked · Qwen3.6 Plus #12
Pick GPT-5.3 Codex if you want the stronger benchmark profile. Qwen3.6 Plus only becomes the better choice if coding is the priority or you need the larger 1M context window.
Agentic
+9.9 difference
Coding
+1.7 difference
GPT-5.3 Codex
Qwen3.6 Plus
$1.75 / $14
$null / $null
79 t/s
N/A
88.26s
N/A
400K
1M
Pick GPT-5.3 Codex if you want the stronger benchmark profile. Qwen3.6 Plus only becomes the better choice if coding is the priority or you need the larger 1M context window.
GPT-5.3 Codex is clearly ahead on the provisional aggregate, 87 to 73. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.3 Codex's sharpest advantage is in agentic, where it averages 71.5 against 61.6. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 77.3% to 61.6%. Qwen3.6 Plus does hit back in coding, so the answer changes if that is the part of the workload you care about most.
Qwen3.6 Plus gives you the larger context window at 1M, compared with 400K for GPT-5.3 Codex.
GPT-5.3 Codex is ahead on BenchLM's provisional leaderboard, 87 to 73. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 77.3% and 61.6%.
Qwen3.6 Plus has the edge for coding in this comparison, averaging 64.8 versus 63.1. Inside this category, Vibe Code Bench is the benchmark that creates the most daylight between them.
GPT-5.3 Codex has the edge for agentic tasks in this comparison, averaging 71.5 versus 61.6. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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