GPT-Image-2.5 (Sunburst) vs GLM-5-3 (Flagship)
A direct, empirical evaluation of GPT-Image-2.5 (Sunburst) (OpenAI) against GLM-5-3 (Flagship) (Zhipu AI & THUDM).
GPT-Image-2.5 (Sunburst)
Developed by OpenAI · Proprietary Multimodal DiT parameters
High-fidelity typographic rendering, raytracing reflection accuracy, sketch-to-image conditioning, and localized comment inpainting.
GLM-5-3 (Flagship)
Developed by Zhipu AI & THUDM · 744B parameters
Complex algorithmic reasoning, multi-step code synthesis, and long-horizon tool execution.