DeepSeek V3.1-Terminus vs Qwen3.5 9B
| Spec | DeepSeek V3.1-Terminus | Qwen3.5 9B |
|---|---|---|
| Respan Index | 20.6 (#114) | 20.5 (#115) |
| Blended price per 1M | $0.453 | $0.1 |
| Context window | 128K | 262K |
| Input / output per 1M | $0.27 / $1 | $0.09 / $0.13 |
| Max output | - | - |
| Input | text | text, vision, video |
| Released | 2025-09-22 | 2026-03-02 |
Respan Index by category
Each category is scored 0 to 100, and how far ahead the winner is. Leads under a point are close to even.
| Category | DeepSeek V3.1-Terminus | Qwen3.5 9B |
|---|---|---|
| Coding | 5.2 DeepSeek V3.1-Terminus | 2.8 Qwen3.5 9B |
| Agents | 15.5 DeepSeek V3.1-Terminus | 23.0 Qwen3.5 9B |
| Reasoning | 25.3 DeepSeek V3.1-Terminus | 23.4 Qwen3.5 9B |
| Knowledge & language | 19.6 DeepSeek V3.1-Terminus | 14.6 Qwen3.5 9B |
| Human preference | 47.3 DeepSeek V3.1-Terminus | 44.6* Qwen3.5 9B |
* Estimated: no published scores in that category. How the Respan Index works
Benchmarks both report
DeepSeek V3.1-Terminus leads on 1 of the 1 benchmarks both report. Higher is better. Each score links to where it was published.
| Benchmark | DeepSeek V3.1-Terminus | Qwen3.5 9B |
|---|---|---|
| MMLU-Pro | 85% | 82.5% |
FAQ
Is DeepSeek V3.1-Terminus better than Qwen3.5 9B?
DeepSeek V3.1-Terminus scores 20.6 on the Respan Index (#114), ahead of Qwen3.5 9B at 20.5 (#115). DeepSeek V3.1-Terminus leads on 1 of the 1 benchmarks both report.
Which is cheaper, DeepSeek V3.1-Terminus or Qwen3.5 9B?
DeepSeek V3.1-Terminus lists at $0.27 input and $1 output per 1M tokens; Qwen3.5 9B at $0.09 and $0.13. Qwen3.5 9B is 4.5x cheaper per token at list price.
Which has the larger context window?
DeepSeek V3.1-Terminus accepts 128K tokens and Qwen3.5 9B 262K tokens.