GPT-5.4 nano vs Qwen3.5-Flash
| Spec | GPT-5.4 nano | Qwen3.5-Flash |
|---|---|---|
| Respan Index | 23.8 (#98) | 23.3 (#100) |
| Blended price per 1M | $0.463 | $0.16 |
| Context window | 400K | 1M |
| Input / output per 1M | $0.2 / $1.25 | $0.09 / $0.368 |
| Max output | 128K | - |
| Input | text, vision | text, vision |
| Released | 2026-03-17 | 2026-02-23 |
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-5.4 nano | Qwen3.5-Flash |
|---|---|---|
| Coding | 9.2 GPT-5.4 nano | 8.9* Qwen3.5-Flash |
| Agents | 21.5 GPT-5.4 nano | 18.5 Qwen3.5-Flash |
| Reasoning | 32.0 GPT-5.4 nano | 29.7 Qwen3.5-Flash |
| Knowledge & language | 13.2 GPT-5.4 nano | 20.3 Qwen3.5-Flash |
| Human preference | 45.2 GPT-5.4 nano | 46.3 Qwen3.5-Flash |
* Estimated: no published scores in that category. How the Respan Index works
Benchmarks both report
GPT-5.4 nano leads on 5 of the 8 benchmarks both report. Higher is better. Each score links to where it was published.
FAQ
Is GPT-5.4 nano better than Qwen3.5-Flash?
GPT-5.4 nano scores 23.8 on the Respan Index (#98), ahead of Qwen3.5-Flash at 23.3 (#100). GPT-5.4 nano leads on 5 of the 8 benchmarks both report.
Which is cheaper, GPT-5.4 nano or Qwen3.5-Flash?
GPT-5.4 nano lists at $0.2 input and $1.25 output per 1M tokens; Qwen3.5-Flash at $0.09 and $0.368. Qwen3.5-Flash is 2.9x cheaper per token at list price.
Which has the larger context window?
GPT-5.4 nano accepts 400K tokens and Qwen3.5-Flash 1M tokens.