Term
GLM-5.1
GLM-5.1 is Z.ai's open-source flagship from April 2026 — 744B parameters (40B active), 200k context, designed for agentic coding with up to 8 hours of autonomous runtime.
GLM-5.1 — explained in more detail
Z.ai (formerly Zhipu AI) released GLM-5.1 on April 7, 2026. It is a post-training upgrade to GLM-5 built on a Mixture-of-Experts architecture with 744 billion parameters (40B active), a 200k context window and a maximum output length of 131k tokens. The jump comes not from additional pretraining but from refined reinforcement learning and alignment — explicitly aimed at agentic engineering tasks.
Example / Practical use
On SWE-Bench Pro, GLM-5.1 scores 58.4, edging past GPT-5.4 (57.7) and Claude Opus 4.6 (57.3) at launch. The model can run a single coding task autonomously for up to 8 hours — planning, execution, tests and optimization in a loop. Weights are available on Hugging Face under the MIT license; API pricing is $1.00 per 1M input tokens and $3.20 per 1M output tokens.
Entdecke mehr
Three Days with Claude Fable 5 — and Why Opus Stays My Daily Driver
Fable 5 fixed a bug in one shot that Opus failed at twice. I'm still not switching. My honest impressions from the trenches after three days.
GlossarGLM-4.6
GLM-4.6 is Zhipu AI's open-weight MoE model from September 2025 — 355B parameters (32B active), 200k context, MIT-licensed, with a focus on coding performance.
LexikonComparing AI models — who builds what and how to choose
The major model families in 2026 at a glance. Who builds Claude, GPT, Gemini, Llama, Mistral, DeepSeek, Qwen — and which model to pick when.