Compare Z.AI: GLM 4.5 Air by Zhipu AI against Horizon Alpha by OpenRouter, in 9 community votes, z.ai: glm 4.5 air wins 71% of head-to-head duels, context windows of 128K vs 256K, tested across 33 shared challenges. Updated April 2026.
Z.AI: GLM 4.5 Air is the better choice overall, winning 71% of 9 blind community votes on Rival. Z.AI: GLM 4.5 Air costs $0.2/M input tokens vs $0/M for Horizon Alpha. Context windows: 128K vs 256K tokens. Compare their real outputs side by side below.
Z.AI: GLM 4.5 Air is made by zhipu while Horizon Alpha is from openrouter. Z.AI: GLM 4.5 Air has a 128K token context window compared to Horizon Alpha's 256K. On pricing, Z.AI: GLM 4.5 Air costs $0.2/M input tokens vs $0/M for Horizon Alpha. In community voting, In 9 community votes, Z.AI: GLM 4.5 Air wins 71% of head-to-head duels.
In 9 community votes, Z.AI: GLM 4.5 Air wins 71% of head-to-head duels. Z.AI: GLM 4.5 Air leads in Image Generation. Based on blind community voting from the Rival open dataset of 9+ human preference judgments for this pair.
Pick Z.AI: GLM 4.5 Air. In 9 blind votes, Z.AI: GLM 4.5 Air wins 71% of the time. That's not luck.
Z.AI: GLM 4.5 Air particularly excels in Image Generation.
Z.AI: GLM 4.5 Air uses 540.4x more bold
Ask 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.

Compare Z.AI: GLM 4.5 Air by Zhipu AI against Horizon Alpha by OpenRouter, in 9 community votes, z.ai: glm 4.5 air wins 71% of head-to-head duels, context windows of 128K vs 256K, tested across 33 shared challenges. Updated April 2026.
Z.AI: GLM 4.5 Air is the better choice overall, winning 71% of 9 blind community votes on Rival. Z.AI: GLM 4.5 Air costs $0.2/M input tokens vs $0/M for Horizon Alpha. Context windows: 128K vs 256K tokens. Compare their real outputs side by side below.
Z.AI: GLM 4.5 Air is made by zhipu while Horizon Alpha is from openrouter. Z.AI: GLM 4.5 Air has a 128K token context window compared to Horizon Alpha's 256K. On pricing, Z.AI: GLM 4.5 Air costs $0.2/M input tokens vs $0/M for Horizon Alpha. In community voting, In 9 community votes, Z.AI: GLM 4.5 Air wins 71% of head-to-head duels.
In 9 community votes, Z.AI: GLM 4.5 Air wins 71% of head-to-head duels. Z.AI: GLM 4.5 Air leads in Image Generation. Based on blind community voting from the Rival open dataset of 9+ human preference judgments for this pair.
Pick Z.AI: GLM 4.5 Air. In 9 blind votes, Z.AI: GLM 4.5 Air wins 71% of the time. That's not luck.
Z.AI: GLM 4.5 Air particularly excels in Image Generation.
Z.AI: GLM 4.5 Air uses 540.4x more bold
Ask 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.

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21+ more head-to-head results. Free. Not a trick.
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33 fights queued
21+ more head-to-head results. Free. Not a trick.
Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy