DeepSeek releases V4.1-Flash-1017 under MIT with gains on coding and agent tests
TL;DR
- On 17 October DeepSeek released DeepSeek-V4.1-Flash-1017 on Hugging Face under the MIT licence, a minor update to V4.1-Flash.
- Its own table shows 42.3 on Terminal-Bench 4.0 against 31.2 for V4.1-Flash and 77.0 on DeepSWE v1.1 against 74.2, with shorter outputs and faster task runs.
- There is no Jinja chat template; the prompt format comes as encoding.py and the deepseek-recipe Rust libraries. OpenRouter's page gives the release date as 17 October and lists 33 provider endpoints.
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