Open models offer real benefits, but their risks raise the question of whether they outweigh them

Anthropic released a report arguing that Z.ai's GLM-5.3, released in August and freely downloadable, poses a major cyberattack risk.

The debate centers on whether frontier models should be open-weight, which allows downloading, retraining and research, or kept behind closed APIs.

Closed models currently lead open ones in capability, with open models a handful of months behind, according to the Artificial Analysis LLM leaderboard.