GPT-5.5 Pro vs DeepSeek V4 Flash
DeepSeek V4 Flash is cheaper on output tokens, while GPT-5.5 Pro offers a larger context window. Choose GPT-5.5 Pro or DeepSeek V4 Flash based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5.5 Pro | DeepSeek V4 Flash |
|---|---|---|
| Provider | ZenMux | ZenMux |
| Input / 1M tokens | $30.00 | $0.14 |
| Output / 1M tokens | $180.00 | $0.28 |
| Context window | 1.1M | 1M |
| Parameters | — | 284B |
| Open weights | No | Yes |
| Released | Apr 2026 | Apr 2026 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.