How far behind the closed frontier are open-weight cyber capabilities? About 6–7 months.
Zai’s GLM-5.3 is the highest-scoring open-weight model on our Cyber ECI. Its score of 160 beats OpenAI’s GPT-5.4, released in March.
Epoch AI says open-weight models trail the closed frontier in cyber by 6–7 months
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Epoch AI estimates open-weight models lag the closed frontier by about 6–7 months on cyber capabilities. Z.ai's GLM-5.3 is the highest-scoring open-weight model on Epoch's Cyber ECI, with a score of 160. That score is higher than OpenAI's GPT-5.4, released in March.
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