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AI Evaluation & Safety
HiddenLayer focuses on machine learning model security: detecting adversarial inputs, model theft, model tampering, and supply-chain attacks against ML pipelines. The company's Automated Red Teaming product runs adversarial probes against deployed models continuously, and the Model Scanner product inspects model artifacts for malicious code. HiddenLayer raised a $50M Series A in 2023 with M12 (Microsoft's venture fund) leading.
Why this matters in 2026
HiddenLayer research published in early 2024 demonstrated practical model-theft attacks against GPT-class models via the OpenAI API. The work directly shaped how foundation labs throttle and watermark inference responses.
Model security: detecting adversarial attacks, model theft, and ML supply chain compromise
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