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Comparison of Z.ai: GLM 4.5, Z.ai: GLM 5.1
2 modelsz-aiZ.ai: GLM 4.5Remove ×z-aiZ.ai: GLM 5.1Remove ×
What’s differentGLM-4.5 is our latest flagship foundation model, purpose-built for agent-based applications. It leverages a Mixture-of-Experts (MoE) architecture and supports a context length of up to 128k tokens. GLM-4.5…GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interactions, GLM-5.1 can work…
DateJul 20, 2025ListedApr 3, 2026Listed
Listed rate$0.60 in / $2.20 out/ 1M tokensZ.AI · via OpenRouter · all routes ↗z-ai/fp8 · quantization=fp8$0.966 in / $3.036 out/ 1M tokensExperiential · all routes ↗Standard list rate
Provider endpoints3 endpoints →18 endpoints →
Context window131.1K204.8K
Max output98.3K128K
Parameters——
Tool callingSupportedSupported
Structured outputSupportedSupported
ReasoningSupportedSupported
Prompt cachingSupportedSupported
Open weightsSupportedSupported

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