Model comparison
GPT-5-Codex vs Qwen Plus
GPT-5-Codex and Qwen Plus score almost the same on the Noometry Index (37.9 vs 37.1), so choose on price, context window or the category you care about most.
Last verified . 1 shared benchmarks.
Alibaba (Qwen)Summary
- They share 1 benchmark with published results for both. GPT-5-Codex scores higher in 2 categories and Qwen Plus in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in coding, where GPT-5-Codex leads 42.4 to 38.9.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 70.3% for GPT-5-Codex and 63.3% for Qwen Plus.
- Qwen Plus is cheaper at $0.40 / $1.20 per million input/output tokens, against $1.25 / $10 for GPT-5-Codex.
- Qwen Plus accepts more context: 1M tokens versus 400K.
Side by side
| GPT-5-Codex | Qwen Plus | |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 37.9 | 37.1 |
| Released | 2025-09-15 | 2024-01-25 |
| Weights | Proprietary | Proprietary |
| Context window | 400K | 1M |
| Max output | 128K | 33K |
| Input $ / M tokens | $1.25 | $0.40 |
| Output $ / M tokens | $10 | $1.20 |
| Results tracked | 3 | 20 |
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Category by category
Coding GPT-5-Codex leads
GPT-5-Codex: 42.4 (#103), Qwen Plus: 38.9 (#167)
| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| WeirdML | 54.5% | — |
| LMArena Coding | — | 1328 |
Agentic & Tool Use Not comparable
GPT-5-Codex: 31.0 (#72), Qwen Plus: —
| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| Terminal-Bench | 44.3% | — |
Reasoning GPT-5-Codex leads
GPT-5-Codex: 30.9 (#83), Qwen Plus: 28.4 (#107)
| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| Kagi LLM Benchmark | 70.3% | 63.3% |
| LMArena Hard Prompts | — | 1317 |
| DTBench | — | 81.1% |
| LMCA | — | 24% |
Math Not comparable
GPT-5-Codex: —, Qwen Plus: 23.3 (#271)
| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 17.8% |
| LMArena Math | — | 1326 |
| MATH Level 5 | — | 65.3% |
| FrontierMath (Feb 2025 set) | — | 1.7% |
Knowledge Not comparable
GPT-5-Codex: —, Qwen Plus: 27.4 (#251)
| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| GPQA Diamond | — | 48.1% |
| LMArena Expert | — | 1328 |
Multilingual Not comparable
GPT-5-Codex: —, Qwen Plus: 45.1 (#175)
| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| LMArena Non-English | — | 1310 |
| LMArena Chinese | — | 1347 |
| LMArena Japanese | — | 1251 |
| LMArena Russian | — | 1323 |
Instruction Following Not comparable
GPT-5-Codex: —, Qwen Plus: 68.8 (#181)
| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| LMArena Instruction Following | — | 1303 |
Long Context Not comparable
GPT-5-Codex: —, Qwen Plus: 40.3 (#158)
| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| LMArena Longer Query | — | 1324 |
Writing & Preference Not comparable
GPT-5-Codex: —, Qwen Plus: 52.2 (#176)
| Benchmark | GPT-5-Codex | Qwen Plus |
|---|---|---|
| LMArena Text | — | 1326 |
| LMArena Creative Writing | — | 1293 |
| LMArena Multi-Turn | — | 1336 |
Frequently asked questions
Is GPT-5-Codex better than Qwen Plus?
GPT-5-Codex and Qwen Plus score almost the same on the Noometry Index (37.9 vs 37.1), so choose on price, context window or the category you care about most.
Which is cheaper, GPT-5-Codex or Qwen Plus?
Qwen Plus is cheaper. It lists at $0.40 per million input tokens and $1.20 per million output tokens; GPT-5-Codex lists at $1.25 and $10.
Is GPT-5-Codex or Qwen Plus better for coding?
GPT-5-Codex scores higher on coding benchmarks: 42.4 versus 38.9 in the Noometry coding category.
Which has the bigger context window?
Qwen Plus does, with 1M tokens against 400K.
How many benchmarks do GPT-5-Codex and Qwen Plus share?
1 benchmark has published results for both models. GPT-5-Codex has 3 scored results on Noometry and Qwen Plus has 20.