Pricing, Performance & Features Comparison
GPT-5.4 is OpenAI's most capable and efficient frontier model for professional work, combining advanced reasoning, coding, and native computer-use capabilities into a single model. It supports up to 1 million tokens of context, enabling agents to plan, execute, and verify tasks across long horizons. It is also the most factual model OpenAI has released, with individual claims 33% less likely to be false compared to GPT-5.2.
GLM-5 is a mixture-of-experts language model from Z.ai with 744 billion total parameters and 40 billion active parameters, designed for complex systems engineering and long-horizon agentic tasks. It utilizes DeepSeek Sparse Attention (DSA) to reduce deployment costs while maintaining long-context capacity, and achieves best-in-class performance among open-source models in reasoning, coding, and agentic tasks.