GLM 5.1

GLM 5.1 is the flagship agentic-engineering model from Z.ai (formerly Zhipu AI), here deployed inside a Trusted Execution Environment so that hardware attestation evidence can independently verify enclave identity and configuration. This privacy-oriented packaging is the distinguishing feature of this build; the underlying weights are the same ones Z.ai also ships as the standard [[sibling:zai-org-glm-5-1|GLM 5.1]] release.

As a text model, GLM 5.1 carries a 200,000-token context window and is distributed under the permissive MIT license, with FP8 weights suitable for self-hosting. It supports reasoning, web search, and the tool-driven workflows the GLM line targets, positioning it for coding and agentic engineering tasks rather than general chat alone.

GLM 5.1 follows the [[sibling:zai-org-glm-5|GLM 5]] foundation model in the same family. On its developer documentation, Z.ai describes stronger coding capabilities and longer-horizon autonomy than GLM 5, including sustained autonomous work on a single task. These are vendor-reported characterizations; independent verification of the refreshed claims was not established from the primary sources available here, so specific benchmark figures are omitted.

For lighter or faster deployments, Z.ai also offers related models in the broader catalog, including [[sibling:zai-org-glm-4.7|GLM 4.7]] and its Flash variant [[sibling:zai-org-glm-4.7-flash|GLM 4.7 Flash]], giving users a range of sizes around this flagship build.

Sources

GLM-5.1 - Overview - Z.AI DEVELOPER DOCUMENT· docs.z.aiConfidential VM attestation | Google Cloud Documentation· docs.cloud.google.comzai-org/GLM-5.1 · Hugging Face· huggingface.co

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