Comprehensive side-by-side LLM comparison
GLM 5 offers 59.7K more tokens in context window than GPT-4o. GLM 5 is $9.14 cheaper per million tokens. GPT-4o supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
Zhipu AI
GLM-5 is a large language model from Zhipu AI with 745 billion total parameters and 44 billion active parameters per inference, designed for agentic intelligence, advanced reasoning, and frontier-level performance. It features a 200K token context window and targets complex multi-step tasks requiring sustained reasoning and tool use. GLM-5 is available via Zhipu AI's Z.ai platform under an MIT license.
OpenAI
GPT-4o, released by OpenAI in May 2024, is a multimodal large language model from the GPT-4 family that natively processes text, image, and audio inputs in a single end-to-end model. It features a 128K token context window and demonstrated competitive performance across coding, reasoning, and vision benchmarks at its release. GPT-4o targets general-purpose assistant applications, vision-enabled workflows, and use cases requiring low-latency multimodal understanding.
1 year newer

GPT-4o
OpenAI
2024-05-13
GLM 5
Zhipu AI
2026-02-11
Cost per million tokens (USD)
GLM 5
GPT-4o
Context window and performance specifications
GPT-4o
2024-04
Available providers and their performance metrics
GLM 5
Zhipu AI
GPT-4o
GLM 5
GPT-4o
GLM 5
GPT-4o
OpenAI