Meta released a large open-weight model on 15 October. Unlike the multimodal Llama 4 models, the licence does not exclude European businesses. Furthermore, ChatGPT can now operate your browser tabs, and Claude Code Review has come out of preview.
Muse Spark Open: what it is
Muse Spark Open is a mixture-of-experts model of roughly 816 billion parameters. Around 42 billion are active per token. The context window extends to 1 million tokens. You can input text, image, audio and video and receive text back. This is stated in the announcement on Hugging Face. According to the model card, it was trained on data in more than a hundred languages.
Unlike Muse Wonder, you download Spark Open yourself.
The GDPR point: no EU exclusion
With Llama 4, companies headquartered in the EU were not granted rights to the multimodal models. See the warning on our Llama profile. The Muse Model License contains no such exclusion. Europe is mentioned in only one place: if you are established in the European region, you contract the licence with Meta Platforms Ireland Limited instead of Meta Platforms, Inc.
Conditions that do apply:
- You must display "Built with Muse Spark Open" in your product or in the accompanying documentation.
- If you offer the model as a service to third parties (via an API) and you and your affiliates have more than $20 million in revenue over twelve months, you first need a separate agreement with Meta. Internal use does not fall under this, according to the licence.
- Download goes through a manual access request. You enter your full name, date of birth and the official name of your organisation.
What does this mean for you? Self-hosting is the strongest GDPR argument there is: prompts and documents then never reach Meta or any other provider. This is worth considering for organisations in healthcare, in the public sector or in the legal profession. You do need heavy hardware for it: according to Hugging Face, four servers with eight H200 GPUs each for the full version, or one B200 server for the 4-bit version. For most practices, an EU hosting provider is more realistic. In that case, check in the data processing agreement where the servers are located.
ChatGPT operates your browser tabs
Since 15 October, the ChatGPT extension for Chrome does more, reports Unite.AI. In Chat mode, ChatGPT reads along with your open tabs. In Work mode, it can operate tabs: sending messages, filling in forms and downloading files. The extension works on all subscriptions. For a new website, you are asked whether ChatGPT may work with it once, for that site only or for all sites.
What does this mean for you? Never choose "all sites" if you also have a CRM, a patient record system or an HR system open in your browser. More about the profiles can be found at /veiligheid/.
Claude Code Review out of preview
On 15 October, Anthropic made Code Review generally available for Team and Enterprise. It automatically checks pull requests on GitHub, now in 6 to 10 minutes. According to the documentation, reviews run on Anthropic's infrastructure. If your organisation has Zero Data Retention or its own encryption keys (CMEK), you cannot use the feature. For teams in software development, this means your source code goes to Anthropic.
In brief
- Muse Spark Open (816B, open weights) has no EU exclusion in its licence. Self-hosting does, however, require heavy hardware.
- ChatGPT can now operate tabs. Grant permission per site only.
- Claude Code Review is generally available, but not with Zero Data Retention.
All models side by side: /modellen/.