GPT-5.3 Chat (latest) vs DeepSeek V4 Flash
DeepSeek V4 Flash is cheaper on output tokens, while DeepSeek V4 Flash offers a larger context window. Choose GPT-5.3 Chat (latest) or DeepSeek V4 Flash based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5.3 Chat (latest) | DeepSeek V4 Flash |
|---|---|---|
| Provider | Opper | Opper |
| Input / 1M tokens | $1.75 | $0.25 |
| Output / 1M tokens | $14.00 | $0.66 |
| Context window | 128K | 1M |
| Parameters | — | — |
| Open weights | No | Yes |
| Released | Mar 2026 | Apr 2026 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.