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OpenAI

GPT-5.6 Luna: Online Chat & API

gpt-5.6-luna

OpenAI's light GPT-5.6 tier — everyday intelligence with a full 1M-token context window at a remarkably small price.

Input 34 ₽ · Output 204 ₽ /1M tokens1.05M context Thinking Prompt caching
API key
gpt-5.6-luna
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Try it right here

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

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About GPT-5.6 Luna

GPT-5.6 Luna is the light tier of OpenAI's GPT-5.6 family: fast, dependable everyday intelligence for chat, drafting, extraction and routine coding — at a price that makes very high volumes practical.

Unusually for its class it keeps the full 1M-token context window, and prompt caching discounts repeated context further.

On Sozdai you can use GPT-5.6 Luna 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 GPT-5.6 Luna

Tiny price, full context

Light-tier pricing with the same 1M-token window as its bigger siblings — rare in this class.

Everyday dependability

OpenAI-grade instruction following for chat, drafting and routine coding at scale.

OpenAI-compatible API

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

Prompt caching, up to 90% off

Mark stable context (system prompts, tools, documents) with cache_control and repeated tokens are billed at a fraction of the input price.

One balance for everything

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

Specifications

Model IDgpt-5.6-luna
FamilyOpenAI
TypeLLM
Context window1.05M tokens
Input price34 ₽ / 1M tokens
Output price204 ₽ / 1M tokens
Cache read price3,4 ₽ / 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 \"gpt-5.6-luna\". 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

Can I try GPT-5.6 Luna 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). Cache hits are billed at a heavily discounted rate. No subscription.

Does it support thinking / reasoning?+

Yes — reasoning can be enabled per request for harder problems.

What is the context window?+

1M tokens — the full window, even on the light tier.