DeepSeek V4-Pro vs GPT-5 nano
Detailed pricing comparison and cost analysis.
Updated September 2026
Cost Simulator
| Feature | DeepSeek V4-Pro | GPT-5 nano |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Input Price (1M) | $1.32 | $0.05 |
| Output Price (1M) | $3.96 | $0.40 |
| Context Window | 1,000,000 | 400,000 |
Verdict
DeepSeek V4-Pro costs $1.32 per 1M input tokens and $3.96 per 1M output tokens. GPT-5 nano costs $0.05 per 1M input tokens and $0.40 per 1M output tokens. GPT-5 nano is 96% cheaper on input tokens than DeepSeek V4-Pro. For output tokens, GPT-5 nano is the more affordable option at $0.40/1M vs $3.96.
On context window, DeepSeek V4-Pro supports 1,000,000 tokens — meaning it can fit more conversation history, documents, or code in a single request. This matters for RAG pipelines, long document analysis, and agentic workflows where context builds up over many turns.
When to choose DeepSeek V4-Pro
- ✓ You need a larger context window (1,000,000 tokens)
- ✓ You are already integrated with DeepSeek
When to choose GPT-5 nano
- ✓ You need the lowest input token cost ($ 0.05/1M)
- ✓ Your workload is output-heavy — GPT-5 nano generates text cheaper
- ✓ You are already integrated with OpenAI
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 GPT-5 nano? ▼
GPT-5 nano is cheaper on input tokens at $0.05/1M vs $1.32/1M for DeepSeek V4-Pro — a 96% saving.
What is the context window of DeepSeek V4-Pro vs GPT-5 nano? ▼
DeepSeek V4-Pro has a 1,000,000-token context window. GPT-5 nano has a 400,000-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 GPT-5 nano? ▼
The best choice depends on your use case. For cost efficiency on input tokens, GPT-5 nano 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.