Qwen3.5 Flash vs Qwen2.5 72B
Both have similar output pricing, while Qwen3.5 Flash offers a larger context window. Choose Qwen3.5 Flash or Qwen2.5 72B based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Qwen3.5 Flash | Qwen2.5 72B |
|---|---|---|
| Provider | Alibaba | NanoGPT |
| Input / 1M tokens | $0.10 | $0.36 |
| Output / 1M tokens | $0.40 | $0.40 |
| Context window | 1M | 131K |
| Parameters | — | 73B |
| Open weights | No | Yes |
| Released | Feb 2026 | Jul 2025 |
| GPQA Diamond score | 82.3 | — |
| Epoch Capabilities Index score | 144 | 129 |
| FrontierMath score | 6.2 | — |
| LMArena (Chatbot Arena) Elo score | 1397 | — |
| LMArena WebDev Elo score | 1244 | — |
FAQ
Is Qwen3.5 Flash or Qwen2.5 72B cheaper?
Qwen3.5 Flash and Qwen2.5 72B have comparable output pricing.
Which has the larger context window, Qwen3.5 Flash or Qwen2.5 72B?
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.