DeepSeek V4.1 Flash vs GPT-5.1
| DeepSeek DeepSeek V4.1 Flash | OpenAI GPT-5.1 | |
|---|---|---|
| Vendor | DeepSeek | OpenAI |
| Context window | 1,040,000 | 400,000 |
| Max output | 384,000 | 128,000 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text | text, image |
| Output | text | text |
| Released | 2026-09-10 | 2025-11-12 |