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GLM 5.1OPEN
GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks.
Prices update automatically — checked daily against provider list prices.
- $1.49 per 1M tokens, assuming 3 input for 1 output the convention used by Artificial Analysis
- cheaper than 9% of the 200 open-weight models tracked here
- 13 of 18 Z.AI models tracked here, from cheapest
Benchmarks & performance
Independent benchmark scores for GLM 5.1, measured by Artificial Analysis. Higher is better. Measurement mode: Reasoning.
About this model
GLM 5.1 is an open-weight AI model by Z.AI. You can download and self-host it for free; the prices below are hosted-API list prices, tracked daily, for when you prefer convenience over self-hosting.
Frequently asked questions
What is GLM 5.1?
GLM 5.1 is an AI language model from Z.AI. It is open-weight: you can download it and run it on your own hardware, for free.
Is GLM 5.1 free?
The weights are free and open — you can self-host GLM 5.1 and pay nothing per token. If you prefer a hosted API, list prices are $0.97 per million input tokens and $3.04 per million output tokens.
What is GLM 5.1 good at?
Independent benchmarks from Artificial Analysis give it GPQA 86.8%, Humanity's Last Exam 30.1%, Long Context Reasoning 73.7%, SciCode 44.8%, IFBench 76.3%, τ²-Bench 97.7%, τ-Bench Banking 13.6%, Terminal-Bench 61.8%, Terminal-Bench Hard 43.2%. It is particularly used for code generation.
Can I self-host GLM 5.1?
Yes. GLM 5.1 has open weights, so you can download it and run it on your own GPU or server with tools like Ollama, vLLM or llama.cpp — with no per-token cost.