# GLM-5.2 — Z.ai's new flagship coding model with 1M context

> Z.ai's new coding flagship lands first inside the GLM Coding Plan, with API, chatbot, and open weights set for next week.

- Org: Z.ai
- Date: 2026-06-13
- Category: model
- Source: https://docs.z.ai/devpack/latest-model
- Canonical page: https://ai-tldr.dev/releases/zai-glm-5-2/

## In short

Z.ai released GLM-5.2 to every GLM Coding Plan tier today, with a usable 1M-token context, 131K max output, and two thinking-effort levels. The API, chatbot, and MIT-licensed weights are promised for next week.

## What it is

GLM-5.2 is the latest model from Chinese frontier lab Z.ai (formerly Zhipu AI). It is the successor to GLM-5.1 and is aimed at long-horizon coding and agent tasks. The release is rolling out to GLM Coding Plan subscribers across the Lite, Pro, Max, and Team tiers.

## How it works

The model runs with a 1,000,000-token context window and a maximum of 131,072 output tokens. It exposes two thinking-effort levels, high (default) and max, which developers select with the /effort command inside their coding agent. Z.ai integrates GLM-5.2 with Claude Code, Cline, OpenCode, Roo Code, OpenClaw, Kilo Code, Crush, and Goose by overriding the Anthropic model environment variables.

## Why it matters

GLM-5.1 was already a strong open-weights coding model. GLM-5.2 keeps that recipe and pushes the context window to 1M tokens, useful for whole-repo refactors and multi-hour agent runs. It also lands the same day the US government's order to suspend Claude Fable 5 and Mythos 5 hit, giving developers an alternative open-route option once the MIT weights land next week.

## Who it's for

developers running agentic coding workflows who want a 1M-context, open-route option

## Try it

subscribers can switch via settings.json: ANTHROPIC_DEFAULT_OPUS_MODEL: GLM-5.2

## Links

- [Latest Model Docs](https://docs.z.ai/devpack/latest-model)
- [GLM Coding Plan](https://docs.z.ai/devpack/overview)
- [HuggingFace Org](https://huggingface.co/zai-org)