Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.3 Codex
87
Qwen3.5-122B-A10B
65
Verified leaderboard positions: GPT-5.3 Codex unranked · Qwen3.5-122B-A10B #8
Pick GPT-5.3 Codex if you want the stronger benchmark profile. Qwen3.5-122B-A10B only becomes the better choice if coding is the priority or you want the cheaper token bill.
Agentic
+15.4 difference
Coding
+8.9 difference
GPT-5.3 Codex
Qwen3.5-122B-A10B
$1.75 / $14
$0 / $0
79 t/s
N/A
88.26s
N/A
400K
262K
Pick GPT-5.3 Codex if you want the stronger benchmark profile. Qwen3.5-122B-A10B only becomes the better choice if coding is the priority or you want the cheaper token bill.
GPT-5.3 Codex is clearly ahead on the provisional aggregate, 87 to 65. 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 56.1. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 77.3% to 49.4%. Qwen3.5-122B-A10B does hit back in coding, so the answer changes if that is the part of the workload you care about most.
GPT-5.3 Codex is also the more expensive model on tokens at $1.75 input / $14.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Qwen3.5-122B-A10B. That is roughly Infinityx on output cost alone. GPT-5.3 Codex gives you the larger context window at 400K, compared with 262K for Qwen3.5-122B-A10B.
GPT-5.3 Codex is ahead on BenchLM's provisional leaderboard, 87 to 65. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 77.3% and 49.4%.
Qwen3.5-122B-A10B has the edge for coding in this comparison, averaging 72 versus 63.1. Inside this category, SWE-bench Verified 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 56.1. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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