Z.AI: GLM 4.5 Air vs GPT-5 Pro
Compare Z.AI: GLM 4.5 Air by Zhipu AI against GPT-5 Pro by OpenAI, context windows of 128K vs 400K, tested across 41 shared challenges. Updated April 2026.
Which is better, Z.AI: GLM 4.5 Air or GPT-5 Pro?
Z.AI: GLM 4.5 Air and GPT-5 Pro are both competitive models. Z.AI: GLM 4.5 Air costs $0.2/M input tokens vs $15/M for GPT-5 Pro. Context windows: 128K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between Z.AI: GLM 4.5 Air and GPT-5 Pro
Z.AI: GLM 4.5 Air is made by zhipu while GPT-5 Pro is from openai. Z.AI: GLM 4.5 Air has a 128K token context window compared to GPT-5 Pro's 400K. On pricing, Z.AI: GLM 4.5 Air costs $0.2/M input tokens vs $15/M for GPT-5 Pro.
No community votes yet. On paper, GPT-5 Pro has the edge — bigger model tier, newer, bigger context window.
Z.AI: GLM 4.5 Air is 109x cheaper per token — worth considering if cost matters.
Style Comparison
Z.AI: GLM 4.5 Air uses 540.4x more bold
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.
