Model comparison
Qwen3-1.7B vs Qwen3.5-9B
Qwen3.5-9B is the stronger model overall, scoring 33.8 to 26.6 on the Noometry Index.
Last verified . 3 shared benchmarks.
Alibaba (Qwen)Summary
- They share 3 benchmarks with published results for both. Qwen3-1.7B scores higher in 1 category and Qwen3.5-9B in 3 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Qwen3.5-9B leads 46.0 to 19.6.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 8.1% for Qwen3-1.7B and 61.7% for Qwen3.5-9B.
Side by side
| Qwen3-1.7B | Qwen3.5-9B | |
|---|---|---|
| Provider | Alibaba (Qwen) | Alibaba (Qwen) |
| Noometry Index | 26.6 | 33.8 |
| Released | 2025-04-29 | 2026-02-23 |
| Weights | Open | Open |
| Context window | — | 262K |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.15 |
| Results tracked | 4 | 10 |
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Category by category
Coding Not comparable
Qwen3-1.7B: —, Qwen3.5-9B: 35.9 (#217)
| Benchmark | Qwen3-1.7B | Qwen3.5-9B |
|---|---|---|
| SciCode | — | 27.5% |
Agentic & Tool Use Qwen3-1.7B leads
Qwen3-1.7B: 24.7 (#115), Qwen3.5-9B: 14.5 (#151)
| Benchmark | Qwen3-1.7B | Qwen3.5-9B |
|---|---|---|
| Terminal-Bench | — | 9.2% |
| Berkeley Function Calling Leaderboard | 28.4% | — |
Reasoning Qwen3.5-9B leads
Qwen3-1.7B: 19.2 (#267), Qwen3.5-9B: 23.1 (#182)
| Benchmark | Qwen3-1.7B | Qwen3.5-9B |
|---|---|---|
| Chess Puzzles | 0% | 12% |
| CritPt | — | 0.3% |
| DTBench | — | 71.2% |
| LMCA | — | 24.5% |
| Epoch Capabilities Index | — | 139.46 |
Math Qwen3.5-9B leads
Qwen3-1.7B: 16.3 (#294), Qwen3.5-9B: 34.8 (#192)
| Benchmark | Qwen3-1.7B | Qwen3.5-9B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 8.1% | 61.7% |
| MathArena Final-Answer Competitions | — | 48.5% |
Knowledge Qwen3.5-9B leads
Qwen3-1.7B: 19.6 (#278), Qwen3.5-9B: 46.0 (#84)
| Benchmark | Qwen3-1.7B | Qwen3.5-9B |
|---|---|---|
| GPQA Diamond | 38% | 79% |
Frequently asked questions
Is Qwen3-1.7B better than Qwen3.5-9B?
Qwen3.5-9B is the stronger model overall, scoring 33.8 to 26.6 on the Noometry Index.
How many benchmarks do Qwen3-1.7B and Qwen3.5-9B share?
3 benchmarks have published results for both models. Qwen3-1.7B has 4 scored results on Noometry and Qwen3.5-9B has 10.