Z-AI API & Models on GPTProto

Lower Than Official Pricing
OpenRouter-Grade Stability
No Subscriptions — Pay As You Go

Build coding agents, long-context research workflows, structured text pipelines, and everyday AI applications with affordable Z.ai GLM APIs. Compare supported models by task and live price, then call the right route with one GPTProto API key and a shared pay-as-you-go balance.

Models

Model				Input → Output
GLM 5.3	1.05M	$1.26 / $3.96 per 1M	— / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
GLM 5.2	1.05M	$1.26 / $3.96 per 1M	$0.23 / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
GLM 5.1	205K	$1.26 / $3.96 per 1M	$0.23 / $0.23 per 1M	Input: TextInput: Document Output: Text
GLM 5 Turbo	203K	$1.08 / $3.60 per 1M	$0.22 / $0.22 per 1M	Input: TextInput: Document Output: Text
GLM 5	205K	$0.90 / $2.88 per 1M	$0.18 / $0.18 per 1M	Input: TextInput: Document Output: Text

Pricing

Cost calculator

Multi-turn agent with cached context.

Input tokens$1.26 / 1M$0.00189

Output tokens$3.96 / 1M$0.003168

Cache read tokens$0.234 / 1M$0.00585

Cost per request$0.010908

Top up

GPTProto vs official pricing.

10% off

Requests

You pay$100

You receive$100.00

Save$5.15 (5%)vs Z-AI official

About Z-AI

Z.ai develops the GLM family of language and multimodal AI models, with a strong focus on coding, reasoning, tool use, and agentic workflows. Z-AI is the provider label used in GPTProto, while GLM identifies the model family shown in the catalog. This Z-AI models collection brings the supported GPTProto routes, live prices, Model IDs, and task fit into one place for practical comparison. Use the cards above to review current availability rather than treating this page as a list of every model released by Z.ai. The catalog is updated as GPTProto adds, changes, or removes supported routes.

Why Use Z-AI with GPTProto?

Compare supported GLM routes and manage them alongside other providers without maintaining separate API accounts for every model family.

One Key, Shared Balance

Use one GPTProto API key and shared balance across Z-AI and other supported model providers.

Verified 10% Savings

Current supported Z-AI routes are priced 10% below their matched Z.ai direct list rates.

Live Comparable Pricing

Compare current GPTProto token rates on each model card before testing or deploying a route.

Hosted GLM Access

Call supported GLM APIs without deploying, scaling, or maintaining the available open model weights yourself.

Route-Specific Controls

Review each model's documented thinking, tool, caching, and structured-output parameters before integrating it into production.

How to Access Z-AI Models

Get started with a Z-AI API through GPTProto.

1
Create a GPTProto Account
Sign up and open the dashboard to manage your balance, API keys, and usage.
2
Generate an API Key
Create a key in your dashboard and store it securely in your application or server environment.
3
Call a Z-AI Model
Open a live model page, follow its route-specific documentation, and use the displayed Model ID in your request.

Z-AI API FAQ

Which Z-AI models are available on GPTProto?

The live catalog above is the source of truth for supported models, Model IDs, status, modalities, and pricing. It may not include every model released by Z.ai, and it changes as GPTProto availability changes.

What is the difference between Z-AI, Z.ai, and GLM?

Z.ai is the official developer brand, Z-AI is GPTProto's provider label, and GLM is the model family. The version or workload label in each model name identifies the specific route.

Which Z-AI model should I use for coding and agents?

Start with GLM-5.2 for repository-scale coding and long-context engineering. Consider GLM-5-Turbo when your workload centers on OpenClaw-style tool use, scheduled tasks, or persistent execution. Always test both against your own prompts and tools.

Do I need a separate Z.ai API key?

No. Use a GPTProto API key and the Model ID shown on the selected model page. Follow that route's documentation because supported fields and parameters can differ by model.

Are Z-AI models 10% off on GPTProto?

At the time of publication, every supported Z-AI route on this page is priced 10% below its matched Z.ai direct list rate. Check the live model cards because prices and reference rates can change.

How does GPTProto handle API data?

GPTProto processes API inputs and outputs to complete requests and may retain them temporarily for transaction processing and error debugging. Technical usage metadata may also be logged. Data sent to an upstream model provider is subject to that provider's policies.

Can I use Z-AI outputs commercially or for any content?

As between you and GPTProto, you retain rights in your inputs and outputs, subject to the applicable Z.ai or upstream terms. Commercial use and content eligibility can vary, and all requests must follow GPTProto's Acceptable Use Policy and the relevant provider rules.

How do credits, refunds, and rate limits work?

GPTProto uses prepaid, pay-as-you-go credits. Purchased credits are generally final and non-refundable except where required by law or otherwise agreed. RPM, TPM, and concurrency limits vary by model and route; review the selected route's current documentation before production use.

Start with Z-AI

One GPTProto API key for Z-AI and other providers.

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