# Z.ai — GLM-5.1

- Company: Z.ai (z.ai)
- Announced: 2026-04-07T00:00:00+00:00
- Category: new-model
- Subject: GLM
- Models affected: GLM-5.1
- Source: https://docs.z.ai/release-notes/new-released#2026-04-07
- Record: https://forck.live/items/4448-glm-5-1

Z.ai announced GLM-5.1, a model designed for long-horizon tasks that can work independently for up to 8 hours, with stronger engineering intelligence and capability alignment with Claude Opus 4.6.

## Evidence

Verbatim from https://docs.z.ai/release-notes/new-released#2026-04-07:

> Designed for long-horizon tasks, GLM-5.1 can work independently for up to 8 hours in a single run, enabling a full loop from planning and execution to iterative refinement and final delivery.

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Record: https://forck.live/items/4448-glm-5-1
Catalogue: https://forck.live/llms.txt
Feed: https://forck.live/feed.md