Deepseek-Chat vs Qwen3.5 Flash
Qwen3.5 Flash is cheaper on output tokens, while Qwen3.5 Flash offers a larger context window. Choose Deepseek-Chat or Qwen3.5 Flash based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Deepseek-Chat | Qwen3.5 Flash |
|---|---|---|
| Provider | 302.AI | Alibaba |
| Input / 1M tokens | $0.29 | $0.10 |
| Output / 1M tokens | $0.43 | $0.40 |
| Context window | 128K | 1M |
| Parameters | — | — |
| Open weights | No | No |
| Released | Nov 2024 | Feb 2026 |
| GPQA Diamond score | 71.2 | 82.3 |
| LMArena (Chatbot Arena) Elo score | — | 1397 |
| LMArena WebDev Elo score | — | 1244 |
| FrontierMath score | — | 6.2 |
| Epoch Capabilities Index score | — | 144 |
FAQ
Is Deepseek-Chat or Qwen3.5 Flash cheaper?
Qwen3.5 Flash is cheaper on output tokens ($0.40 vs $0.43 per 1M).
Which has the larger context window, Deepseek-Chat or Qwen3.5 Flash?
Qwen3.5 Flash has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.