Model comparison
GPT-5.5 Pro vs Qwen3.5-9B
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 33.3 on the Noometry Index. Qwen3.5-9B costs 600× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Last verified . 7 shared benchmarks.
Alibaba (Qwen)Summary
- They share 7 benchmarks with published results for both. GPT-5.5 Pro scores higher in 3 categories and Qwen3.5-9B in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.5 Pro leads 73.6 to 22.5.
- The biggest single-benchmark swing is Chess Puzzles: 64% for GPT-5.5 Pro and 12% for Qwen3.5-9B.
- Qwen3.5-9B is cheaper at $0.10 / $0.15 per million input/output tokens, against $30 / $180 for GPT-5.5 Pro.
- GPT-5.5 Pro accepts more context: 1.05M tokens versus 262K.
- Qwen3.5-9B has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | Qwen3.5-9B | |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 64.3 | 33.3 |
| Released | 2026-04-23 | 2026-02-23 |
| Weights | Proprietary | Open |
| Context window | 1.05M | 262K |
| Max output | 128K | 66K |
| Input $ / M tokens | $30 | $0.10 |
| Output $ / M tokens | $180 | $0.15 |
| Results tracked | 14 | 10 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, Qwen3.5-9B: 35.3 (#213)
| Benchmark | GPT-5.5 Pro | Qwen3.5-9B |
|---|---|---|
| SciCode | — | 27.5% |
Agentic & Tool Use Not comparable
GPT-5.5 Pro: —, Qwen3.5-9B: 14.4 (#143)
| Benchmark | GPT-5.5 Pro | Qwen3.5-9B |
|---|---|---|
| Terminal-Bench | — | 9.2% |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.6 (#7), Qwen3.5-9B: 22.5 (#178)
| Benchmark | GPT-5.5 Pro | Qwen3.5-9B |
|---|---|---|
| CritPt | 30.6% | 0.3% |
| Chess Puzzles | 64% | 12% |
| DTBench | 96% | 71.2% |
| LMCA | 53.9% | 24.5% |
| Epoch Capabilities Index | 162.45 | 139.45 |
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 83.8 (#8), Qwen3.5-9B: 33.5 (#174)
| Benchmark | GPT-5.5 Pro | Qwen3.5-9B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 61.7% |
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| MathArena Final-Answer Competitions | — | 48.5% |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
Knowledge GPT-5.5 Pro leads
GPT-5.5 Pro: 64.2 (#17), Qwen3.5-9B: 46.0 (#77)
| Benchmark | GPT-5.5 Pro | Qwen3.5-9B |
|---|---|---|
| GPQA Diamond | 93.9% | 79% |
Frequently asked questions
Is GPT-5.5 Pro better than Qwen3.5-9B?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 33.3 on the Noometry Index. Qwen3.5-9B costs 600× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.5 Pro or Qwen3.5-9B?
Qwen3.5-9B is cheaper. It lists at $0.10 per million input tokens and $0.15 per million output tokens; GPT-5.5 Pro lists at $30 and $180.
Which has the bigger context window?
GPT-5.5 Pro does, with 1.05M tokens against 262K.
How many benchmarks do GPT-5.5 Pro and Qwen3.5-9B share?
7 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Qwen3.5-9B has 10.