GLM-5.2 is probably the most powerful text-only open weights LLM

Z.ai released GLM-5.2, a 753-billion parameter text-only open weights LLM (large language model, a type of AI trained on text) under an MIT license on June 16th, 2026. It features a 1-million token context window (the amount of text it can consider at once) and ranks as the top open weights model on independent benchmarks, though it uses significantly more output tokens per task than competing models. The model performs well on web development coding tasks but has shown mixed results in creative image generation tasks compared to its predecessor.