Z.ai: GLM 5 vs GPT-4o (Omni)
Compare Z.ai: GLM 5 by Zhipu AI against GPT-4o (Omni) by OpenAI, context windows of 203K vs 128K, tested across 53 shared challenges. Updated May 2026.
Which is better, Z.ai: GLM 5 or GPT-4o (Omni)?
Z.ai: GLM 5 and GPT-4o (Omni) are both competitive models. Z.ai: GLM 5 costs $0.8/M input tokens vs $2.5/M for GPT-4o (Omni). Context windows: 203K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Z.ai: GLM 5 and GPT-4o (Omni)
Z.ai: GLM 5 is made by zhipu while GPT-4o (Omni) is from openai. Z.ai: GLM 5 has a 203K token context window compared to GPT-4o (Omni)'s 128K. On pricing, Z.ai: GLM 5 costs $0.8/M input tokens vs $2.5/M for GPT-4o (Omni).
Per 1M tokens
Z.ai: GLM 5 is cheaper on both — 3.1× input, 3.9× output
No community votes yet. On paper, Z.ai: GLM 5 has the edge — newer, bigger context window.
Z.ai: GLM 5 is 3.9x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-4o (Omni) uses 2.5x more emoji
