Orange Cyberdefense joins Mistral design partner programme for Large 4

Orange Cyberdefense will use Mistral AI’s latest model to help test clients’ systems for weaknesses, investigate breaches and speed up responses to cyberattacks.

The French security firm joined the design partner programme for Mistral Large 4 on Thursday, becoming the first European managed security services provider to take part.

The Orange unit plans to introduce the model gradually across its services. Its first uses will include technical audits and penetration testing, in which security specialists try to break into a client’s systems to uncover vulnerabilities.

The model will also help teams assess how attackers might gain access to those systems and investigate incidents when a breach occurs. The aim is to help security staff understand what happened and respond more quickly.

Mistral launched Large 4 in early October, a model with one trillion parameters, and the company has since made its weights available for download, allowing developers to run and adapt it themselves.

A cybersecurity-focused version is now being tested by a small group of partners, which are restricted to using it on systems they own or have permission to assess.

Orange Cyberdefense will run its security models on computers in Mistral’s European data centres. The company says this arrangement will help clients retain control over their data, an increasingly important consideration when using AI for sensitive security work.

Mistral has made data control and deployment flexibility part of its argument for using open models rather than relying entirely on closed AI systems.

“This alliance between Orange Cyberdefense and Mistral AI strengthens the foundation of cybersecurity augmented by trustworthy AI,” said Anis Trabelsi, head of innovation and AI at Orange Cyberdefense.

The partnership builds on the security firm’s existing use of AI. Since April 2025, it has used a tool from Qevlar AI in its security operations centres, where staff monitor clients’ systems for threats.

The companies did not disclose the financial terms of the agreement, and the rollout will initially target business and public-sector clients.

With expertise in digital marketing, product management, and branding & identity, Ana Maria Constantin develops strategies that resonate (show all) With expertise in digital marketing, product management, and branding & identity, Ana Maria Constantin develops strategies that resonate with our target audience in the software/SaaS industry. Collaboration and teamwork are paramount to her, as she loves empowering her colleagues to achieve outstanding results and unlock their full potential.

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