GLM-5.1 specs, prices, where it runs and its benchmark standing

Name: GLM-5.1
Author: Z.ai

open weights · top 10 on 0 of 4 · released Apr 7, 2026

Provider: Z.ai
Release date: Apr 7, 2026; Boards
Parameters: 754B total; Hugging Face
Modalities: Text to Text; OpenRouter
License: MIT; Hugging Face
Context window: 205K tokens; Pricing
Pricing: $0.9 in / $2.9 out per 1M tokens; All prices
Hosting: 13 priced API routes · OpenRouter · self-host: weights on Hugging Face; Pricing
Hardware: Estimate: about 1508 GB of weights as published (BF16), about 754 GB at 8-bit, about 377 GB at 4-bit, plus memory for the context; Hugging Face config
Weights: Open weights
Benchmarks: 4 boards captured

Rank	Board	Category	Score	Of
46	GPQA DiamondReasoning · as “glm-5.1”	Reasoning	89.9%	100
48	Text ArenaChat · as “GLM-5.1”	Chat	1,465	84
56	WebDev ArenaCoding · as “GLM-5.1”	Coding	1,508	82
62	Epoch ECIReasoning · as “GLM-5.1”	Reasoning	150.7	100

Versions and release history

7 versions in this line since Jul 28, 2025, from Pricing, OpenRouter and the boards.

Category ranks, more models and catalog changes