Claude Sonnet 4.5 vs Z.AI: GLM 4.5 Air
Compare Claude Sonnet 4.5 by Anthropic against Z.AI: GLM 4.5 Air by Zhipu AI, context windows of 200K vs 128K, tested across 42 shared challenges. Updated April 2026.
Which is better, Claude Sonnet 4.5 or Z.AI: GLM 4.5 Air?
Claude Sonnet 4.5 and Z.AI: GLM 4.5 Air are both competitive models. Claude Sonnet 4.5 costs $3/M input tokens vs $0.2/M for Z.AI: GLM 4.5 Air. Context windows: 200K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4.5 and Z.AI: GLM 4.5 Air
Claude Sonnet 4.5 is made by anthropic while Z.AI: GLM 4.5 Air is from zhipu. Claude Sonnet 4.5 has a 200K token context window compared to Z.AI: GLM 4.5 Air's 128K. On pricing, Claude Sonnet 4.5 costs $3/M input tokens vs $0.2/M for Z.AI: GLM 4.5 Air.
No community votes yet. On paper, Claude Sonnet 4.5 has the edge — newer, bigger context window.
Z.AI: GLM 4.5 Air is 14x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Sonnet 4.5 uses 5.8x more sentence length
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.
