DeepSeek-V4.1-Flash-1017
#23 in Open-Source LLMsDeepSeek · v4.1 · flash 1017 · since 2026-10-17 · 3× · last seen Oct 19, 2026
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Momentum
DeepSeek-V4.1-Flash-1017 is an update to the DeepSeek-V4.1-Flash model released on October 17, 2026, with improved agent and coding capabilities and shorter task runtime and output length. The model is available via the DeepSeek website, app and API (model name deepseek-flash), and its weights are published on Hugging Face under the MIT license. API pricing is unchanged from V4.1-Flash.
Momentum trend
21.07.19.10.
Features
| Key Benchmark (%) | DeepSWE v1.1: 77.0 (Pass@1, third-party report); Toolathlon: 70.3 (vendor-reported) |
| Context Window (Tokens) | 1M tokens (max output up to 384K) |
| License | MIT (open weights) |
| Multimodality | Yes, native visual understanding (vision) |
| Platform | DeepSeek website, app and API (model name deepseek-flash); weights on Hugging Face and ModelScope |
| Price per 1M Tokens | Off-peak: $0.15 input (cache miss), $0.003 input (cache hit), $0.60 output; peak (double): $0.30 / $0.006 / $1.20 |
| Release Date | October 17, 2026 |