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GLM

GLM-5.3-Flash: Online Chat & API

glm-5.3-flash

The fast, low-cost sibling of GLM-5.3 — high throughput and a 1M-token context, built for high-volume chat, agents and everyday tasks at a fraction of the flagship price.

Input 19,13 ₽ · Output 63,75 ₽ /1M tokens1.05M context Thinking Prompt caching
API key
glm-5.3-flash
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Try it right here

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

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About GLM-5.3-Flash

GLM-5.3-Flash is Zhipu AI's speed-and-cost optimized model in the GLM-5.3 family: high throughput and low latency while keeping the full 1M-token context window.

It's the pragmatic default for high-volume workloads — chat, classification, extraction, routing and lightweight agents — where you want strong quality per ruble and fast responses.

On Sozdai you can use GLM-5.3-Flash 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-Flash

Fast and cheap

Optimized for throughput and low latency at a small fraction of the flagship price — ideal for high-volume calls.

1M-token context

The full large context window is kept, so long documents and big inputs still fit in one call.

OpenAI-compatible API

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

Great for agents at scale

Low cost per call makes it a strong fit for background steps, routing and high-frequency tool use.

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-flash
FamilyGLM
TypeLLM
Context window1.05M tokens
Input price19,13 ₽ / 1M tokens
Output price63,75 ₽ / 1M tokens
Cache read price3,83 ₽ / 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-flash\". 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 Flash different from GLM-5.3?+

GLM-5.3-Flash trades some peak quality for much higher speed and a much lower price, keeping the 1M context. Use the flagship GLM-5.3 for the hardest coding and reasoning; use Flash for high-volume everyday work.

Can I try it 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.

How does pricing work?+

Pure pay-as-you-go per token, shown on this page and billed from your credit balance (1 credit = $0.01). No subscription.

What is the context window?+

1M tokens — long documents and large inputs in a single request.