What is the context window of GLM-4-Long?

GLM-4-Long has a 1,000,000-token context window with a maximum output of 4,096 tokens. It is optimized for text-based tasks with function calling and structured output support.

What are the rate limits for GLM-4-Long?

Rate limits for GLM-4-Long depend on your MixRoute plan tier. Check your current quota in the console and run a small load test on your own workload.

What is GLM-4-Long best used for?

GLM-4-Long is optimized for ultra-long context processing (1M tokens) and memory-intensive tasks. It supports function calling, structured outputs, and tool use for agentic workflows.

Can I use the existing OpenAI SDK to call GLM-4-Long?

Yes. GLM-4-Long is available through MixRoute’s OpenAI-compatible Chat Completions endpoint. Set the model parameter to “glm-4-long” and use your MixRoute API key.

What should you evaluate before moving production traffic to GLM-4-Long?

Before moving production traffic to GLM-4-Long, verify the specs and rate limits in the console, run a pilot on your typical tasks, and compare quality, latency, and cost against your current setup on a representative sample.

Model detail

GLM-4-Long

Provided by GLM

Pay-as-you-go

A GLM model designed for very long documents and memory-intensive tasks, including document analysis, summarization, and extended conversations.

Model specs

Model ID: glm-4-long

Context length: 1M
Max output: 4.096K
I/O modalities
Released: 2024-01

API endpoints

One MixRoute gateway, OpenAI-compatible

OpenAI-compatible /v1/chat/completions POST

Pricing

Flat rate, unit: /1M Tokens

Input

$0.1429 /1M Tokens

Completion

$0.1429 /1M Tokens

Selection summary

Quickly judge whether it fits your workload

What is this model good for?

A GLM model designed for very long documents and memory-intensive tasks

A GLM model designed for very long documents and memory-intensive tasks, including document analysis, summarization, and extended conversations.

What should you check before using it?

1,000,000 context, 4,000 output,

Supports . Part of the GLM-4 series by Zhipu AI.

Why use it through MixRoute?

Drop-in via OpenAI-compatible endpoint on MixRoute

Set the model parameter to "glm-4-long" and use your MixRoute API key. Compatible with OpenAI SDK and standard tool-calling patterns.

Capabilities & compatibility

Unconfirmed capabilities stay "Unknown," no guesses

Streaming

GLM-4-Long supports streamed responses.

EX stream: true streams tokens incrementally, so chat UIs render as they arrive.

Prompt caching

GLM-4-Long supports prompt caching under supported routing conditions.

EX Keep the system prompt and tool definitions at the start of the request; repeated prefixes are automatically billed at the cache-read rate.

OpenAI SDK

Call GLM-4-Long through MixRoute's OpenAI-compatible endpoint.

EX Change base_url to https://api.mixroute.ai/v1; everything else follows the OpenAI style.

Token cost estimator

Live estimate from this page's pricing, not an actual bill

Input tokens Max per request 1M

Output tokens Max per request 4.096K

Requests / month

Cache hit rate –

This model has no cache-read price; caching is not counted

FAQ

GLM-4-Long supports context caching, which can significantly reduce latency and cost for repeated prefixes. Stable content such as system prompts and tool definitions benefits most.

Get started

01

Create an API key

Generate a key in the Console; one key calls every model.
02

Set the base URL

Fully OpenAI SDK-compatible; just swap the URL to connect.

https://api.mixroute.ai/v1
03

Specify the model ID

In the request's model field, enter:

glm-4-long

Create an API key

New users get $5 in free credits

Test this model and alternate routes with the same request format

Start from a real workload, then let quality, total cost, and failure conditions decide whether to send production traffic.

Create an API key View integration docs