Mistral Large 4 Preview lands a score of 50 on the AI Cyber Index
As seen on the 24/7 Wall St. homepage on October 6, 2026.
Europe's best shot at a frontier lab is about to put a top-three open weights cyber model into anyone's hands, free, while Chinese labs hold the lead at 56.
Mistral Large 4 Preview scores 50 on the Artificial Analysis Cyber Index, level with GLM-5.3-Flash (50) and behind MiMo-V2.6-Pro (56). Once its weights are released, it will rank among the top three open weights models on the Cyber Index. Its strongest result is on https://t.co/jLEa6fjZoG
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Mistral Large 4 Preview has posted a score of 50 on the Artificial Analysis Cyber Index, drawing level with GLM-5.3-Flash and trailing leader MiMo-V2.6-Pro. The benchmark measures how well a model handles cybersecurity-related tasks, making it one of the more consequential capability indices for enterprise and security-focused deployments.
Once Mistral releases the model's weights publicly, it will rank among the top three open-weights models on the Cyber Index. That means anyone will be able to download and run a model competitive at the frontier of AI security capability, with no API costs or access restrictions.
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The models ahead of Mistral Large 4 Preview, including MiMo-V2.6-Pro, are products of Chinese labs. A top-three open-weights cyber model from a European frontier lab changes the competitive picture, particularly for organizations with data-sovereignty or geopolitical constraints on which models they can use.
Mistral's tweet also notes that the model's strongest individual result on the Cyber Index came from one specific sub-benchmark, though the full breakdown was not included in the post. Investors and developers tracking the open-weights AI space will want to watch the weight release closely, with the Cyber Index ranking set to be clarified once the complete evaluation is available.