Twitter/X

GLM-5.1 is Zai_org’s new open-source LLM announced April 7, 2026, claiming #1…

2026-04-07 · 16:14 UTC ·@Zai_org ·0 min read

Brief

GLM-5.1 is Zai_org’s new open-source LLM announced April 7, 2026, claiming #1 open-source and #3 global rankings on SWE-Bench Pro, Terminal-Bench, and NL2Repo. Designed for long-horizon autonomy, it reportedly runs eight-hour autonomous sessions and self-refines over thousands of iterations. Blog, weights (Hugging Face) and API docs are linked; chat.z.ai rollout imminent.

Source evidence

title: @Zai_org: Introducing GLM-5.1: The Next Level of Open Source

  • Top-Tier Performance: #1 in open source and #3...
    author: @Zaiorg
    content    type: tweet
    publication: Twitter/X
    published: 2026-04-07T16:14:21+00:00
    sourceurl: https://x.com/Zaiorg/status/2041550153354519022

    word_count: 57

Introducing GLM-5.1: The Next Level of Open Source

  • Top-Tier Performance: #1 in open source and #3 globally across SWE-Bench Pro, Terminal-Bench, and NL2Repo.
  • Built for Long-Horizon Tasks: Runs autonomously for 8 hours, refining strategies through thousands of iterations.

Blog: z.ai/blog/glm-5.1
Weights: huggingface.co/zai-org/GLM-5…
API: docs.z.ai/guides/llm/glm-5.1
Coding Plan: z.ai/subscribe

Coming to chat.z.ai in the next few days.