# GLM-5.1

> **TL;DR.** GLM-5.

- **Category:** AI / LLMs / Open Source
- **Stage:** validating
- **Age:** 81 days
- **Origin date:** 2026-03-27
- **First detected:** 2026-04-23
- **Canonical URL:** https://earlyterms.com/term/glm-5-1
- **Sources:** 7 primary URLs

## Definition

GLM-5.1 is Z.ai's 754-billion-parameter open-weight large language model, purpose-built for agentic engineering and long-horizon coding tasks. It is a post-training upgrade to GLM-5 sharing the same Mixture-of-Experts Dynamic Sparse Architecture, released under the permissive MIT license.

Z.ai (formerly Zhipu AI, a Tsinghua University spinoff) shipped the API on [March 27, 2026](https://docs.z.ai/release-notes/new-released), then released open-source weights on [April 7, 2026](https://huggingface.co/zai-org/GLM-5.1), claiming the #1 spot on SWE-Bench Pro at 58.4%, narrowly ahead of GPT-5.4 (57.7%) and Claude Opus 4.6 (57.3%). It was trained on 100,000 Huawei Ascend 910B chips.

## Analogy

Think of it as a coding contractor who bills hourly but works autonomously for an eight-hour shift.

## Why it's emerging now

GLM-5.1 became the first open-source model to top SWE-Bench Pro on April 7, 2026, doing so on Huawei hardware with no NVIDIA chips — a geopolitical proof-of-concept as much as a benchmark win. Developers are integrating it into coding agents at a fraction of Claude Opus pricing.

## Related terms

- *parent:* agentic-coding
- *related:* coding-agents
- *related:* cloud-coding-agents
- *parent:* agentic-ai
- *competitor:* qwen3
- *competitor:* qwen3-6
- *competitor:* claude-opus-4-6
- *competitor:* DeepSeek V3
- *parent:* GLM-5
- *related:* Z.ai
- *related:* vibe-coding
- *related:* SWE-Bench Pro

## Sources

1. [Z.ai official blog: GLM-5.1 Towards Long-Horizon Tasks](https://z.ai/blog/glm-5.1)
2. [Hugging Face model card — zai-org/GLM-5.1](https://huggingface.co/zai-org/GLM-5.1)
3. [VentureBeat: AI joins the 8-hour work day as GLM ships 5.1](https://venturebeat.com/technology/ai-joins-the-8-hour-work-day-as-glm-ships-5-1-open-source-llm-beating-opus-4)
4. [The Decoder: GLM-5.1 can rethink its own coding strategy](https://the-decoder.com/zhipu-ais-glm-5-1-can-rethink-its-own-coding-strategy-across-hundreds-of-iterations/)
5. [Hacker News discussion (618 pts)](https://news.ycombinator.com/item?id=47677853)
6. [Remio.ai: GLM Coding Plan went viral, then price doubled](https://www.remio.ai/post/the-glm-coding-plan-went-viral-in-north-america-then-the-price-doubled)
7. [Awesome Agents: GLM-5.1 Tops SWE-Bench With Zero NVIDIA Hardware](https://awesomeagents.ai/news/glm-5-1-swe-bench-pro-huawei-chips/)

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_Generated by EarlyTerms · https://earlyterms.com/term/glm-5-1_