Z.ai: GLM 5 vs o1
Compare Z.ai: GLM 5 by Zhipu AI against o1 by OpenAI, context windows of 203K vs 128K, tested across 53 shared challenges. Updated April 2026.
Which is better, Z.ai: GLM 5 or o1?
Z.ai: GLM 5 and o1 are both competitive models. Z.ai: GLM 5 costs $0.8/M input tokens vs $15/M for o1. Context windows: 203K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Z.ai: GLM 5 and o1
Z.ai: GLM 5 is made by zhipu while o1 is from openai. Z.ai: GLM 5 has a 203K token context window compared to o1's 128K. On pricing, Z.ai: GLM 5 costs $0.8/M input tokens vs $15/M for o1.
No community votes yet. On paper, Z.ai: GLM 5 has the edge — bigger model tier, newer, bigger context window.
Z.ai: GLM 5 is 23x cheaper per token — worth considering if cost matters.
Style Comparison
o1 uses 2.2x more transitions
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
