Longest-Context Z.ai Models

Match · Updated July 2026

GLM 5.2 has the largest context window of any Z.ai model, at 1.0M tokens. GLM 5.1 (205K) and GLM 5 (205K) round out the top three.

1.0MContext

51.1Intelligence

$0.966Input /M

AI models with the largest context windows, ranked by token capacity. The best large language models for long documents, codebases and extended conversations.

Frequently asked

Which Z.ai model has the largest context window?

GLM 5.2 has the largest context window of any Z.ai model, at 1.0M tokens. GLM 5.1 (205K) and GLM 5 (205K) round out the top three.

What's a good alternative to GLM 5.2?

GLM 5.1 (205K) is the closest alternative on this metric, followed by GLM 5 (205K). See the full ranking above for the tradeoffs.

How many Z.ai models are there?

modelgrep tracks 12 Z.ai models with live benchmarks, speed, latency and per-provider pricing, led on intelligence by GLM 5.2. 8 of them qualify for this ranking.

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All rankings

Small & Fast LLMs Best Local LLMs Smartest LLMs Best LLMs for Coding Best LLMs for Design & Frontend Fastest LLMs Lowest-Latency LLMs Cheapest LLMs Best Free LLMs Best Reasoning LLMs Best Vision LLMs Best LLMs for Agents Best Open-Source LLMs Best LLMs for Writing Best LLMs for Math & Science Best LLMs for RAG Best LLMs for SQL & Data Analysis Best LLMs for Roleplay Best Uncensored LLMs