Check out the GLM-5.1 first impressions with Peter on our YouTube https://www.youtube.com/watch?v=f11tVBXWr2g

Z.ai's GLM-5.1 is a 754-billion parameter open-weight Mixture-of-Experts model released on April 7, 2026 under an MIT license, designed as a post-training upgrade to GLM-5 with a focus on long-horizon agentic coding tasks; it is notable for being able to work autonomously on a single task for up to eight hours, sustaining optimization across hundreds of iterations and thousands of tool calls. On benchmarks, it achieves state-of-the-art results on SWE-Bench Pro and ranks third overall on Code Arena — the first open-weight model to break into the top three — while being broadly competitive with Claude Opus 4.6 on coding performance. The Arena team shared first impressions of GLM-5.1 in a YouTube video featuring Peter, highlighting the model's capabilities shortly after its public release.

http://Z.ai releases GLM-5.1, a 754B-parameter model that it says outperforms GPT-5.4 and Claude Opus 4.6 on SWE-bench Pro, available under …
GLM-5.1 is live everywhere you use the Kilo Gateway (VS Code extension, Cloud Agents, KiloClaw, etc). Thank you @Zai_org! ⚡️
And if you'd rather watch on YouTube, here’s the link: https://www.youtube.com/watch?v=tYhgWRJeYzs
GLM-5.1: Towards Long-Horizon Tasks
INCREDIBLE GLM-5.1 weights are now opensource > i’ve had early access to the weights for the past few days > and yeah… this one matters a lo…
The chart says GLM-5.1 scored 54.9 on coding benchmarks. Three points behind Claude Opus 4.6. Interesting but not the story. The story is wh…

Source: model-releases

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