Kimi K2 vs Qwen3.5 4B
| Spec | Kimi K2 | Qwen3.5 4B |
|---|---|---|
| Respan Index | 17.3 (#136) | 17.3 (#136) |
| Blended price per 1M | $1 | $0.048 |
| Context window | 128K | 262K |
| Input / output per 1M | $0.57 / $2.3 | $0.04 / $0.07 |
| Max output | - | - |
| Input | text | text, vision, video |
| Released | 2025-07-11 | 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 | Kimi K2 | Qwen3.5 4B |
|---|---|---|
| Coding | 5.3 Kimi K2 | 1.6 Qwen3.5 4B |
| Agents | 12.3* Kimi K2 | 18.7 Qwen3.5 4B |
| Reasoning | 18.5 Kimi K2 | 20.1 Qwen3.5 4B |
| Knowledge & language | 11.6 Kimi K2 | 9.1 Qwen3.5 4B |
| Human preference | 47.2 Kimi K2 | 41.6* Qwen3.5 4B |
* Estimated: no published scores in that category. How the Respan Index works
Benchmarks both report
Kimi K2 leads on 2 of the 2 benchmarks both report. Higher is better. Each score links to where it was published.
FAQ
Is Kimi K2 better than Qwen3.5 4B?
Kimi K2 and Qwen3.5 4B tie on the Respan Index at 17.3. Kimi K2 leads on 2 of the 2 benchmarks both report.
Which is cheaper, Kimi K2 or Qwen3.5 4B?
Kimi K2 lists at $0.57 input and $2.3 output per 1M tokens; Qwen3.5 4B at $0.04 and $0.07. Qwen3.5 4B is 21x cheaper per token at list price.
Which has the larger context window?
Kimi K2 accepts 128K tokens and Qwen3.5 4B 262K tokens.