Model comparison
GPT-5.3 Codex vs Qwen2.5 Plus 1127
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 38.8 on the Noometry Index.
Last verified . 0 shared benchmarks.
Alibaba (Qwen)Summary
- The widest gap is in coding, where GPT-5.3 Codex leads 48.6 to 38.5.
Side by side
| GPT-5.3 Codex | Qwen2.5 Plus 1127 | |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 45.8 | 38.8 |
| Released | 2026-02-05 | — |
| Weights | Proprietary | Proprietary |
| Context window | 400K | — |
| Max output | 128K | — |
| Input $ / M tokens | $1.75 | — |
| Output $ / M tokens | $14 | — |
| Results tracked | 8 | 14 |
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Category by category
Coding GPT-5.3 Codex leads
GPT-5.3 Codex: 48.6 (#56), Qwen2.5 Plus 1127: 38.5 (#175)
| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| SWE-bench Verified | 74.8% | — |
| LMArena WebDev | 1409 | — |
| WeirdML | 79.3% | — |
| LMArena Coding | — | 1314 |
| ALE-Bench | 1,655 | — |
Agentic & Tool Use Not comparable
GPT-5.3 Codex: 48.0 (#9), Qwen2.5 Plus 1127: —
| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| Terminal-Bench | 78.4% | — |
| METR Time Horizons | 74.5% | — |
| Vending-Bench 2 | 5,940 | — |
Reasoning Not comparable
GPT-5.3 Codex: —, Qwen2.5 Plus 1127: 25.9 (#141)
| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Hard Prompts | — | 1299 |
| Epoch Capabilities Index | 156.77 | — |
Math Not comparable
GPT-5.3 Codex: —, Qwen2.5 Plus 1127: 36.1 (#174)
| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Math | — | 1298 |
Knowledge Not comparable
GPT-5.3 Codex: —, Qwen2.5 Plus 1127: 35.5 (#183)
| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Expert | — | 1289 |
Multilingual Not comparable
GPT-5.3 Codex: —, Qwen2.5 Plus 1127: 41.9 (#201)
| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Non-English | — | 1265 |
| LMArena Chinese | — | 1314 |
| LMArena German | — | 1231 |
| LMArena Japanese | — | 1207 |
| LMArena Russian | — | 1271 |
Instruction Following Not comparable
GPT-5.3 Codex: —, Qwen2.5 Plus 1127: 67.2 (#199)
| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Instruction Following | — | 1275 |
Long Context Not comparable
GPT-5.3 Codex: —, Qwen2.5 Plus 1127: 39.2 (#184)
| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Longer Query | — | 1292 |
Writing & Preference Not comparable
GPT-5.3 Codex: —, Qwen2.5 Plus 1127: 49.4 (#192)
| Benchmark | GPT-5.3 Codex | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Text | — | 1299 |
| LMArena Creative Writing | — | 1262 |
| LMArena Multi-Turn | — | 1299 |
Frequently asked questions
Is GPT-5.3 Codex better than Qwen2.5 Plus 1127?
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 38.8 on the Noometry Index.
Is GPT-5.3 Codex or Qwen2.5 Plus 1127 better for coding?
GPT-5.3 Codex scores higher on coding benchmarks: 48.6 versus 38.5 in the Noometry coding category.
How many benchmarks do GPT-5.3 Codex and Qwen2.5 Plus 1127 share?
0 benchmarks have published results for both models. GPT-5.3 Codex has 8 scored results on Noometry and Qwen2.5 Plus 1127 has 14.