Twitter/X

GLM-5.1 is a 754B-parameter open model whose weights occupy 1.51 TB on Hugging…

2026-04-07 · 17:56 UTC ·@simonw ·0 min read

Brief

GLM-5.1 is a 754B-parameter open model whose weights occupy 1.51 TB on Hugging Face; Z.ai claims top-tier benchmark placement (#1 open-source, #3 globally on SWE-Bench Pro, Terminal-Bench, NL2Repo) and an 8-hour autonomous runtime that refines strategies over thousands of iterations. Weights, blog, and API docs are published; chat.z.ai rollout imminent.

Source evidence

title: @simonw: 754B parameters, 1.51TB on Hugging Face

Z.ai (@Zai_org)

Introducing GLM-5.1: The Next Level of Op...
author: @simonw
contenttype: tweet
publication: Twitter/X
published: 2026-04-07T17:56:59+00:00
sourceurl: https://x.com/simonw/status/2041575980863828077

word_count: 67

754B parameters, 1.51TB on Hugging Face

Z.ai (@Zai_org)

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.

— https://nitter.net/Zai_org/status/2041550153354519022#m