o4-mini vs Qwen3.5-Flash
| Spec | o4-mini | Qwen3.5-Flash |
|---|---|---|
| Respan Index | 23.6 (#99) | 23.3 (#100) |
| Blended price per 1M | $1.93 | $0.16 |
| Context window | 200K | 1M |
| Input / output per 1M | $1.1 / $4.4 | $0.09 / $0.368 |
| Max output | 100K | - |
| Input | text, vision | text, vision |
| Released | 2025-04-16 | 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 | o4-mini | Qwen3.5-Flash |
|---|---|---|
| Coding | 7.7 o4-mini | 8.9* Qwen3.5-Flash |
| Agents | 23.7* o4-mini | 18.5 Qwen3.5-Flash |
| Reasoning | 27.2 o4-mini | 29.7 Qwen3.5-Flash |
| Knowledge & language | 19.6 o4-mini | 20.3 Qwen3.5-Flash |
| Human preference | 46.7* o4-mini | 46.3 Qwen3.5-Flash |
* Estimated: no published scores in that category. How the Respan Index works
Benchmarks both report
Qwen3.5-Flash leads on 4 of the 6 benchmarks both report. Higher is better. Each score links to where it was published.
FAQ
Is o4-mini better than Qwen3.5-Flash?
o4-mini scores 23.6 on the Respan Index (#99), ahead of Qwen3.5-Flash at 23.3 (#100). Qwen3.5-Flash leads on 4 of the 6 benchmarks both report.
Which is cheaper, o4-mini or Qwen3.5-Flash?
o4-mini lists at $1.1 input and $4.4 output per 1M tokens; Qwen3.5-Flash at $0.09 and $0.368. Qwen3.5-Flash is 12x cheaper per token at list price.
Which has the larger context window?
o4-mini accepts 200K tokens and Qwen3.5-Flash 1M tokens.