DeepSeek V4-Pro vs Qwen3.8-Flash
Detailed pricing comparison and cost analysis.
Updated September 2026
Cost Simulator
| Feature | DeepSeek V4-Pro | Qwen3.8-Flash |
|---|---|---|
| Provider | DeepSeek | Alibaba |
| Input Price (1M) | $1.32 | $0.15 |
| Output Price (1M) | $3.96 | $0.47 |
| Context Window | 1,000,000 | 1,000,000 |
Verdict
DeepSeek V4-Pro costs $1.32 per 1M input tokens and $3.96 per 1M output tokens. Qwen3.8-Flash costs $0.15 per 1M input tokens and $0.47 per 1M output tokens. Qwen3.8-Flash is 89% cheaper on input tokens than DeepSeek V4-Pro. For output tokens, Qwen3.8-Flash is the more affordable option at $0.47/1M vs $3.96.
On context window, DeepSeek V4-Pro supports 1,000,000 tokens — meaning it can fit more conversation history, documents, or code in a single request. This matters for RAG pipelines, long document analysis, and agentic workflows where context builds up over many turns.
When to choose DeepSeek V4-Pro
- ✓ You are already integrated with DeepSeek
When to choose Qwen3.8-Flash
- ✓ You need the lowest input token cost ($ 0.15/1M)
- ✓ Your workload is output-heavy — Qwen3.8-Flash generates text cheaper
- ✓ You are already integrated with Alibaba
Use the calculator above to simulate your specific workload and find the exact break-even point. For most applications, the cheapest model is the one that minimises your total monthly bill given your input-to-output token ratio.
Frequently Asked Questions
Is DeepSeek V4-Pro cheaper than Qwen3.8-Flash? ▼
Qwen3.8-Flash is cheaper on input tokens at $0.15/1M vs $1.32/1M for DeepSeek V4-Pro — a 89% saving.
What is the context window of DeepSeek V4-Pro vs Qwen3.8-Flash? ▼
DeepSeek V4-Pro has a 1,000,000-token context window. Qwen3.8-Flash has a 1,000,000-token context window. DeepSeek V4-Pro supports the larger context, suitable for longer documents and agentic workflows.
Which model is better: DeepSeek V4-Pro or Qwen3.8-Flash? ▼
The best choice depends on your use case. For cost efficiency on input tokens, Qwen3.8-Flash is the cheaper option. For maximum context length, DeepSeek V4-Pro supports 1,000,000 tokens. Use the comparison table above to find the right fit for your workload.