Orange Cyberdefense Partners with Mistral AI to Deploy Large 4 Model for Cybersecurity Operations

Orange Cyberdefense Becomes First European Partner for Mistral Large 4

Orange Cyberdefense announced Thursday its partnership with Mistral AI, becoming the first European managed security services provider to join the design partner programme for Mistral Large 42

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. The agreement grants the Orange unit early access to a cybersecurity-focused version of Mistral's latest AI model at a time when the industry grapples with hackers using AI to launch increased attacks on a greater scale1

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. Orange Cyberdefense, one of Europe's largest cybersecurity providers, reported €1.3 billion in revenue in 2025 and operates across 13 countries with more than 3,300 experts4

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Deploying AI-Powered Security Solutions for Vulnerability Detection

The French security firm plans to introduce Mistral Large 4 gradually across its services, starting with technical audits and penetration testing2

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. These simulations seek to identify weaknesses in a system before hackers can exploit them, allowing security specialists to try breaking into clients' systems to uncover vulnerabilities4

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. With the cybersecurity-focused AI model, experts should be able to explore more attack scenarios and assess how attackers might gain access to those systems2

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. The initial rollout will be limited to select services Orange provides to corporate and public-sector clients3

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Accelerating Post-Attack Investigations and Incident Response

Beyond vulnerability detection, the model will help teams investigate incidents when a breach occurs, accelerating the analysis of traces and reconstruction of attacks4

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. The aim is to help security staff understand what happened and respond more quickly to cyberattacks2

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. The AI will assist experts in breach investigation by speeding up responses and enabling faster incident response times. Feedback from the field will then help refine the model, creating a continuous improvement cycle for managed security services4

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Building a European AI System for Cybersecurity with Data Control

Orange Cyberdefense will run its security models on computers in Mistral's European data centers, an arrangement designed to help clients retain control over their data2

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. The partners see this infrastructure control as a guarantee of sovereignty for organizations handling sensitive information4

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. "With Mistral AI, we are building a European AI system dedicated to cybersecurity, trained by our experts and operated under their control," said Hugues Foulon, chief executive of Orange Cyberdefense4

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. Mistral has made data control and deployment flexibility part of its argument for using open models rather than relying entirely on closed AI systems2

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Addressing AI-Driven Cyberattacks with Trustworthy AI

"Volume, speed and trust: these are the three challenges facing cybersecurity in the age of AI," Foulon stated4

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. Orange Cyberdefense is establishing one rule: critical actions will remain the responsibility of experts, with access controlled and operations logged4

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. The model itself will be subjected to security testing to ensure trustworthy AI deployment. Anis Trabelsi, head of innovation and AI at Orange Cyberdefense, emphasized that "this alliance between Orange Cyberdefense and Mistral AI strengthens the foundation of cybersecurity augmented by trustworthy AI"2

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. Timothée Lacroix, co-founder and chief technology officer of Mistral AI, added: "Together, we share one objective: to provide European organizations with a sovereign and trusted AI solution to help them defend themselves, designed and operated in Europe"4

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. Mistral launched Large 4 in early October as a model with one trillion parameters and has since made its weights available for download2

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. The partnership builds on Orange Cyberdefense's existing use of AI, including a tool from Qevlar AI deployed in its security operations centers since April 20252

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