www.lesswrong.com/posts/veFMEzDDyWaer2Sms/sanity-checking-incompressible-knowled...
1 correction found
the table of proprietary parameter estimates includes very much open source models such as mistral-medium-3.1 and deepseek-v3.1.
This is inaccurate because Mistral Medium 3.1 was a proprietary Mistral API model, not an open-source/open-weight model. DeepSeek-V3.1 was released with open-source weights, but Mistral Medium 3.1 was classified by Mistral as a commercial/Premier model.
Full reasoning
The sentence groups mistral-medium-3.1 together with deepseek-v3.1 as "very much open source models." That is incorrect for at least one of the two named models.
Mistral's official model catalog distinguishes between open models and commercial ones. In Mistral's docs, Mistral Medium 3.1 is listed as "Premier" and described as "Our frontier-class multimodal model", not as open-weight or open-source. Mistral's broader models page separately labels open models with licenses such as Apache 2.0 or Open, while commercial models are labeled Premier or commercial-license variants. Mistral Medium 3.1 appears in that commercial category, not the open one.
By contrast, DeepSeek's official V3.1 release explicitly linked to "Open-source weights" for DeepSeek-V3.1. So the post's broader point that the table mixed model types may be directionally fair, but the specific claim that mistral-medium-3.1 is "very much open source" is factually wrong.
3 sources
- Mistral Medium 3.1 - Mistral Docs
Mistral Medium 3.1 ... Deprecated Premier v 25.08 ... Our frontier-class multimodal model released August 2025.
- Mistral Docs - Models overview
Mistral develops, or makes available, open-weight and commercial large language models... Mistral Medium 3.5 Modified MIT... Mistral Large 3 Apache 2.0... Mistral Medium 3.1 ... mistral-medium-2508 ... [in deprecated models, not labeled open].
- DeepSeek-V3.1 Release | DeepSeek API Docs
DeepSeek-V3.1 Release ... Open-source weights: https://huggingface.co/deepseek-ai/DeepSeek-V3.1