GPT-4.1 vs Qwen3.5 4B
| Spec | GPT-4.1 | Qwen3.5 4B |
|---|---|---|
| Respan Index | 17.7 (#134) | 17.3 (#136) |
| Blended price per 1M | $3.5 | $0.048 |
| Context window | 1.0M | 262K |
| Input / output per 1M | $2 / $8 | $0.04 / $0.07 |
| Max output | 33K | - |
| Input | text, vision | text, vision, video |
| Released | 2025-04-14 | 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 | GPT-4.1 | Qwen3.5 4B |
|---|---|---|
| Coding | 4.0 GPT-4.1 | 1.6 Qwen3.5 4B |
| Agents | 8.1* GPT-4.1 | 18.7 Qwen3.5 4B |
| Reasoning | 18.5 GPT-4.1 | 20.1 Qwen3.5 4B |
| Knowledge & language | 30.9 GPT-4.1 | 9.1 Qwen3.5 4B |
| Human preference | 46.7 GPT-4.1 | 41.6* Qwen3.5 4B |
* Estimated: no published scores in that category. How the Respan Index works
Benchmarks both report
Qwen3.5 4B leads on 2 of the 2 benchmarks both report. Higher is better. Each score links to where it was published.
FAQ
Is GPT-4.1 better than Qwen3.5 4B?
GPT-4.1 scores 17.7 on the Respan Index (#134), ahead of Qwen3.5 4B at 17.3 (#136). Qwen3.5 4B leads on 2 of the 2 benchmarks both report.
Which is cheaper, GPT-4.1 or Qwen3.5 4B?
GPT-4.1 lists at $2 input and $8 output per 1M tokens; Qwen3.5 4B at $0.04 and $0.07. Qwen3.5 4B is 74x cheaper per token at list price.
Which has the larger context window?
GPT-4.1 accepts 1.0M tokens and Qwen3.5 4B 262K tokens.