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GLM

GLM-5.3: Online Chat & API

glm-5.3

Zhipu AI's newest flagship — a big step up in coding and long-horizon agent work over GLM-5.2, with a 1M-token context window and reasoning built in.

Input 178,5 ₽ · Output 561 ₽ /1M tokens1.05M context Thinking Prompt caching
API key

Try it right here

Real model, streaming live — free trial credits on sign-up

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About GLM-5.3

GLM-5.3 is Zhipu AI's latest flagship (August 2026), built on the GLM-5.2 base with large-scale long-horizon post-training. Zhipu reports the coding feel improves by roughly 50%, with stronger multi-step tool use and agentic tasks.

It keeps the 1M-token context window and adds reasoning by default — a strong pick for coding agents, large-codebase work, document analysis and multilingual products across Chinese, English and Russian.

On Sozdai you can use GLM-5.3 two ways with one account and one credit balance: chat in the browser playground on this page, or call it programmatically through an OpenAI-compatible endpoint. Pricing is pure pay-as-you-go per token with no subscription.

Why GLM-5.3

~50% better coding

A large long-horizon post-training pass over the GLM-5.2 base sharpens code generation and multi-file, multi-step tasks.

Reasoning built in

Extended thinking is on by default for deeper analysis, planning and reliable tool use in agent stacks.

1M-token context

Fit large codebases and long documents into a single conversation without chunking.

OpenAI-compatible API

Point your existing OpenAI SDK at our base URL and it just works — streaming, tool calling, usage accounting included.

One balance for everything

Web chat and API share the same credit balance and transparent per-token pricing. No subscription, no minimums.

Specifications

Model IDglm-5.3
FamilyGLM
TypeLLM
Context window1.05M tokens
Input price178,5 ₽ / 1M tokens
Output price561 ₽ / 1M tokens
Cache read price33,15 ₽ / 1M tokens
Thinking / reasoningYes
Prompt cachingYes
API compatibilityOpenAI SDK + Anthropic /v1/messages
StreamingYes

Integrate in three steps

1

Create an API key

Sign up, open the console and issue a key — free trial credits are included, no card required.

2

Point your SDK at Sozdai

Set the base URL to our endpoint and pass model \"glm-5.3\". Existing OpenAI SDK code needs no other changes.

3

Ship and monitor

Stream responses in production and track every request's tokens and cost in the usage logs.

Frequently asked questions

How is GLM-5.3 different from GLM-5.2?+

GLM-5.3 is the newer flagship, built on the 5.2 base with heavy long-horizon post-training — Zhipu reports about 50% better coding feel and stronger agentic tool use. GLM-5.2 stays available on Sozdai too.

Can I try GLM-5.3 without writing code?+

Yes — the playground on this page is the real model. Sign up, get trial credits and chat instantly; the same account later works for the API.

Is the API compatible with the OpenAI SDK?+

Yes. Use any OpenAI SDK (Python, Node, etc.) with our base URL — streaming and tool calling included.

Does it support thinking / reasoning?+

Yes — GLM-5.3 reasons by default, which helps on complex coding and multi-step agent tasks.

What is the context window?+

1M tokens — long documents and large codebases in one conversation.