Model comparison
GPT-5 Nano vs Qwen3.5 Plus
Qwen3.5 Plus is the stronger model overall, scoring 42.3 to 33.4 on the Noometry Index. GPT-5 Nano costs 6.5× less per token, which makes it the better buy when Qwen3.5 Plus's lead doesn't matter for your workload.
Last verified . 12 shared benchmarks.
Alibaba (Qwen)Summary
- They share 12 benchmarks with published results for both. GPT-5 Nano scores higher in 0 categories and Qwen3.5 Plus in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5 Plus leads 47.9 to 29.1.
- The biggest single-benchmark swing is LMCA: 7.9% for GPT-5 Nano and 36.4% for Qwen3.5 Plus.
- GPT-5 Nano is cheaper at $0.05 / $0.40 per million input/output tokens, against $0.40 / $2.40 for Qwen3.5 Plus.
- Qwen3.5 Plus accepts more context: 1M tokens versus 400K.
Side by side
| GPT-5 Nano | Qwen3.5 Plus | |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 33.4 | 42.3 |
| Released | 2025-08-07 | 2026-02-16 |
| Weights | Proprietary | Proprietary |
| Context window | 400K | 1M |
| Max output | 128K | 66K |
| Input $ / M tokens | $0.05 | $0.40 |
| Output $ / M tokens | $0.40 | $2.40 |
| Results tracked | 48 | 15 |
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Category by category
Coding Not comparable
GPT-5 Nano: 33.3 (#248), Qwen3.5 Plus: —
| Benchmark | GPT-5 Nano | Qwen3.5 Plus |
|---|---|---|
| ALE-Bench | 718.67 | 621.92 |
| SWE-bench Verified (bash only) | 34.8% | — |
| WeirdML | 38.1% | — |
| LMArena Coding | 1351 | — |
Agentic & Tool Use Not comparable
GPT-5 Nano: 25.6 (#99), Qwen3.5 Plus: —
| Benchmark | GPT-5 Nano | Qwen3.5 Plus |
|---|---|---|
| Terminal-Bench | 21.8% | — |
| Berkeley Function Calling Leaderboard | 51.5% | — |
| Vending-Bench 2 | — | 0.54 |
Reasoning Qwen3.5 Plus leads
GPT-5 Nano: 16.4 (#291), Qwen3.5 Plus: 32.0 (#67)
| Benchmark | GPT-5 Nano | Qwen3.5 Plus |
|---|---|---|
| Chess Puzzles | 27% | 22% |
| Mystery Game Puzzles | 9% | 17% |
| DTBench | 62.7% | 80.5% |
| LMCA | 7.9% | 36.4% |
| Epoch Capabilities Index | 139.39 | 146.79 |
| ARC-AGI-2 | 2.6% | — |
| Kagi LLM Benchmark | 62.2% | — |
| ARC-AGI-1 | 20.7% | — |
| LMArena Hard Prompts | 1329 | — |
| ForecastBench | 59.1 | — |
Math Qwen3.5 Plus leads
GPT-5 Nano: 29.1 (#221), Qwen3.5 Plus: 47.9 (#55)
| Benchmark | GPT-5 Nano | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 81.1% | 86.7% |
| FrontierMath (Feb 2025 set) | 8.3% | 21% |
| FrontierMath Tier 4 (v1) | 2.1% | 2.1% |
| FrontierMath (Tiers 1-3) | 20% | — |
| FrontierMath Tier 4 | 2.4% | — |
| ProofBench | 12% | — |
| Omni-MATH | 54.6% | — |
| LMArena Math | 1318 | — |
| MATH Level 5 | 95.2% | — |
Knowledge Qwen3.5 Plus leads
GPT-5 Nano: 35.8 (#166), Qwen3.5 Plus: 46.0 (#78)
| Benchmark | GPT-5 Nano | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 69.4% | 84.8% |
| SimpleQA Verified | 11.7% | 25.4% |
| Vectara Hallucination Rate | 10.5% | 10.7% |
| MMLU-Pro | 77.8% | — |
| GPQA (HELM) | 67.9% | — |
| LMArena Expert | 1321 | — |
Multimodal Not comparable
GPT-5 Nano: 30.7 (#102), Qwen3.5 Plus: —
| Benchmark | GPT-5 Nano | Qwen3.5 Plus |
|---|---|---|
| LMArena Vision | 1159 | — |
| VPCT | 37.2% | — |
Multilingual Not comparable
GPT-5 Nano: 45.5 (#167), Qwen3.5 Plus: —
| Benchmark | GPT-5 Nano | Qwen3.5 Plus |
|---|---|---|
| LMArena Non-English | 1313 | — |
| LMArena Chinese | 1355 | — |
| LMArena German | 1329 | — |
| LMArena Korean | 1269 | — |
| LMArena Russian | 1296 | — |
| LMArena Spanish | 1360 | — |
Instruction Following Not comparable
GPT-5 Nano: 75.2 (#72), Qwen3.5 Plus: —
| Benchmark | GPT-5 Nano | Qwen3.5 Plus |
|---|---|---|
| IFEval | 93.2% | — |
| LMArena Instruction Following | 1306 | — |
Long Context Qwen3.5 Plus leads
GPT-5 Nano: 31.3 (#275), Qwen3.5 Plus: 42.9 (#109)
| Benchmark | GPT-5 Nano | Qwen3.5 Plus |
|---|---|---|
| Fiction.LiveBench | 44.4% | — |
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
| LMArena Longer Query | 1313 | — |
Writing & Preference Not comparable
GPT-5 Nano: 39.4 (#244), Qwen3.5 Plus: —
| Benchmark | GPT-5 Nano | Qwen3.5 Plus |
|---|---|---|
| LMArena Text | 1320 | — |
| LMArena Creative Writing | 1250 | — |
| EQ-Bench Creative Writing | 705 | — |
| WildBench | 80.6% | — |
| LMArena Multi-Turn | 1311 | — |
Frequently asked questions
Is GPT-5 Nano better than Qwen3.5 Plus?
Qwen3.5 Plus is the stronger model overall, scoring 42.3 to 33.4 on the Noometry Index. GPT-5 Nano costs 6.5× less per token, which makes it the better buy when Qwen3.5 Plus's lead doesn't matter for your workload.
Which is cheaper, GPT-5 Nano or Qwen3.5 Plus?
GPT-5 Nano is cheaper. It lists at $0.05 per million input tokens and $0.40 per million output tokens; Qwen3.5 Plus lists at $0.40 and $2.40.
Which has the bigger context window?
Qwen3.5 Plus does, with 1M tokens against 400K.
How many benchmarks do GPT-5 Nano and Qwen3.5 Plus share?
12 benchmarks have published results for both models. GPT-5 Nano has 48 scored results on Noometry and Qwen3.5 Plus has 15.