Model comparison
DeepSeek V4 Flash and GPT-5.5 Pro compared on price, context window, capabilities and published benchmarks. Data comes from the OpenModels registry.
| Specification | DeepSeek V4 Flash | GPT-5.5 Pro |
|---|---|---|
| Developer | Deepseek | Openai |
| Released | Apr 24, 2026 | Mar 1, 2026 |
| Context window | 1M tokens | 256K tokens |
| Input price / 1M | $0.07via Deep Infra | $30.00via OpenAI |
| Output price / 1M | $0.14via Deep Infra | $120.00via OpenAI |
| Providers | 3 | 1 |
| License | mit | proprietary |
| Input modalities | code, text | audio, code, image, text |
| Capabilities | chat, completion, function-calling, code-generation | chat, completion, function-calling, vision, audio, code-generation, reasoning |
| Reasoning | No | Yes |
| Tool calling | Yes | Yes |
No published benchmark scores recorded for these models yet.