Claude 3 Haiku vs Z.ai: GLM 5.1
Compare Claude 3 Haiku by Anthropic against Z.ai: GLM 5.1 by Z-ai, context windows of 200K vs 203K, tested across 53 shared challenges. Updated April 2026.
Which is better, Claude 3 Haiku or Z.ai: GLM 5.1?
Claude 3 Haiku and Z.ai: GLM 5.1 are both competitive models. Claude 3 Haiku costs $0.25/M input tokens vs $1.4/M for Z.ai: GLM 5.1. Context windows: 200K vs 203K tokens. Compare their real outputs side by side below.
Key Differences Between Claude 3 Haiku and Z.ai: GLM 5.1
Claude 3 Haiku is made by anthropic while Z.ai: GLM 5.1 is from z-ai. Claude 3 Haiku has a 200K token context window compared to Z.ai: GLM 5.1's 203K. On pricing, Claude 3 Haiku costs $0.25/M input tokens vs $1.4/M for Z.ai: GLM 5.1.
No community votes yet. On paper, Z.ai: GLM 5.1 has the edge — bigger model tier, newer.
Claude 3 Haiku is 3.5x cheaper per token — worth considering if cost matters.
Style Comparison
Z.ai: GLM 5.1 uses 43.5x more headings
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.
