DeepSeek V4 Flash 0731 is a sparse mixture-of-experts model from DeepSeek, with 13B active parameters out of 284B total. This re-post-trained revision is suited for coding, reasoning, and agent workflows.
Model details →DeepSeek: DeepSeek V4 Flash 0731 vs Qwen: Qwen3.5 Plus 2026-04-20
DeepSeek: DeepSeek V4 Flash 0731 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
Qwen3.5 Plus (April 2026) is a large-scale multimodal language model from Alibaba. It accepts text, image, and video input and produces text output, with a 1M token context window. This...
Model details →Side-by-side comparison
| Capability | DeepSeek: DeepSeek V4 Flash 0731 | Qwen: Qwen3.5 Plus 2026-04-20 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 1M | 🏆 DeepSeek: DeepSeek V4 Flash 0731 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.09 | $0.30 | 🏆 DeepSeek: DeepSeek V4 Flash 0731 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.18 | $1.80 | 🏆 DeepSeek: DeepSeek V4 Flash 0731 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | — | Yes | 🏆 Qwen: Qwen3.5 Plus 2026-04-20 |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is DeepSeek: DeepSeek V4 Flash 0731 better than Qwen: Qwen3.5 Plus 2026-04-20?
DeepSeek: DeepSeek V4 Flash 0731 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between DeepSeek: DeepSeek V4 Flash 0731 and Qwen: Qwen3.5 Plus 2026-04-20?
Input: $0.09 vs $0.30 per 1M tokens. Output: $0.18 vs $1.80 per 1M tokens.
What context windows do DeepSeek: DeepSeek V4 Flash 0731 and Qwen: Qwen3.5 Plus 2026-04-20 support?
DeepSeek: DeepSeek V4 Flash 0731 supports up to 1.0M tokens. Qwen: Qwen3.5 Plus 2026-04-20 supports up to 1M tokens.
Do both DeepSeek: DeepSeek V4 Flash 0731 and Qwen: Qwen3.5 Plus 2026-04-20 support tool calling?
DeepSeek: DeepSeek V4 Flash 0731: yes. Qwen: Qwen3.5 Plus 2026-04-20: yes.
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