GLM-5.3 is a post-trained GLM-5.2, still 753B parameters.

Unfortunately, usage cost of GLM-5.3 in Go is currently 4x GLM-5.2, but I expect they'll adjust that once the open weights drop in ~2 weeks:

• 220 requests per 5 hours (880 for GLM-5.2)
• 540 requests per week (2150 for GLM-5.2)