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Epoch AI estimates open-weight cyber capabilities trail the closed frontier by 6–7 months
- Who
- Epoch AI
- What
- reports GLM-5.3 as the highest-scoring open-weight model on Cyber ECI, with a score of 160
What happened
Epoch AI estimates that open-weight cyber capabilities are about 6–7 months behind the closed frontier. Zai’s GLM-5.3 is the highest-scoring open-weight model on its Cyber ECI, scoring 160 and beating OpenAI’s GPT-5.4, released in March.
Links in the post: 1The story so far
Epoch AI reported that Zai’s GLM-5.3 scored 160 on its Cyber ECI, making it the highest-scoring open-weight model on the measure and placing it ahead of OpenAI’s GPT-5.4, released in March. Epoch AI nevertheless estimated that open-weight models’ cyber capabilities remain about 6–7 months behind the closed-model frontier.
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