GPT 5.6 Luna

gpt-5.6-luna · OpenAI

GPT-5.6 Luna is designed for cost-sensitive, high-volume workloads. It roughly corresponds to the nano model tier used in earlier GPT-5 families.

API Pricing

Input$0.2 / 1M tokens
Output$1.2 / 1M tokens
Cache read$0.02 / 1M tokens

Specifications

Context1.05M tokens
Max output128K tokens
Modalitiestext, image
CapabilitiesThinking, Streaming, Tool calling, Structured outputs, Prompt caching, Server-side sessions
Endpointschat_completions, responses

Frequently asked questions

What is GPT 5.6 Luna?

GPT-5.6 Luna is designed for cost-sensitive, high-volume workloads. It roughly corresponds to the nano model tier used in earlier GPT-5 families.

What is the context length of GPT 5.6 Luna?

GPT 5.6 Luna has a 1,050,000 token context window. It supports up to 128,000 output tokens.

How much does GPT 5.6 Luna cost?

On AIHubMix, GPT 5.6 Luna costs $0.2 per million input tokens and $1.2 per million output tokens. Cached input reads are billed at $0.02 per million tokens.

What modalities does GPT 5.6 Luna support?

GPT 5.6 Luna accepts text and image input.

What capabilities does GPT 5.6 Luna support?

GPT 5.6 Luna supports tool calling, thinking and structured outputs. Per-protocol parameter support is listed in the capability table on this page.

How do I call GPT 5.6 Luna via API?

GPT 5.6 Luna is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to gpt-5.6-luna — no other code changes needed.

Who created GPT 5.6 Luna?

GPT 5.6 Luna is developed by OpenAI. AIHubMix aggregates it alongside models from other providers behind one API and one bill.

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Use GPT 5.6 Luna via the AIHubMix unified API — one interface for every major LLM.