ZAI released GLM 5.1, an open-source model on Hugging Face that scores 58.4 on SWE-Bench Pro, beating GPT-5.4 and Opus. You can download it free, run it locally, and get code-generation quality that matches paid models.
Kind of crazy to me that not more people have been talking about this model. That's GLM 5.1 out of ZAI. What makes this one exciting is that GLM 5.1 is an open source model under the MIT license. You can actually grab the model weights over on Hugging Face right now. But when we look at the actual benchmarks on this, it's beating out most of the state-of-the-art models. I mean, for SWE-Bench Pro software engineering, it's got a 58.4 compared to GPT-5.4's 57.7. In Opus 4.6 57.3. You can download this model, you can fine-tune it for your own use cases, you could run it locally, and theoretically it could write code about as good as GPT-5.4 in Opus 4.6, which is just mind-blowing to me. Just across the board, this model is a really, really impressive model for being open-weight
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