Epoch AI: Open-weight models are 6–7 months behind closed frontier on Cyber ECI
Epoch AI reports that Z.ai's GLM-5.3 is the highest-scoring open-weight model on their Cyber ECI, outpacing GPT-5.4. Dean Ball later added that maintaining a lag of 6-9 months during rapid acceleration means the gap widens faster over time.
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- 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.
35 likes · 8 reposts - Just a reminder that being consistently behind in stable objective time (“6-9 months”) during a time of substantial AI-enabled research acceleration is in fact being behind by a growing amount. A 6-month lag today is subjectively larger than a 6-month lag 6 months ago.@epochairesearch: 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. open on X39 likes · 2 reposts
- Read the full Data Insight and methodology: epoch.ai/data-insights/…4 likes · 0 reposts
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