Comment by a11r

First they ignore you. Then they ridicule you. Then they attack you and want to burn you. And then they build monuments to you. (Nicholas Klein)

Looks like Anthropic is moving on from ridiculing Open Weight to wanting to Burn them.

GLM-5.3 flash has been great for us and I am going to now invest serious effort in evaluating the full fat GLM-5.3 given this ringing endorsement.

Interestingly Z.ai does not train on user prompts, unlike Anthropic. (source: https://openrouter.ai/z-ai/glm-5.3#providers )