GPT-5.6 Luna API
LLMGPT-5.6 Luna is the fast, lowest-priced 5.6 route with 1M context, vision, and tool use.
- Input · USD / 1M tokens$0.2 USD
- Output · USD / 1M tokens$1.2 USD
- Context1M
- Last verified2026-08-15
- View tool pricing and billing rules
What are we making today?
Bring an idea, a question, or a first draft.
01
Where it fits
GPT-5.6 Luna is the fast, lowest-priced 5.6 route with 1M context, vision, and tool use.
Choose Luna for frequent GPT-5.6 coding iterations where responsiveness and lower token cost lead the decision.
02
Model capabilities
Vision
Accepts visual input alongside text for multimodal coding and analysis tasks.
Tool use
Can select and call tools in agent workflows that support structured tool use.
Fast responses
Optimized for responsive iteration and higher-volume agent tasks.
03
OpenAI-compatible API
Keep your client and change the base URL, API key, and model ID.
curl https://api.omniakey.com/v1/chat/completions \
-H "Authorization: Bearer $OMNIAKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.6-luna",
"messages": [{"role": "user", "content": "Explain this codebase"}],
"stream": true
}'04
Compatible coding tools
More OpenAI models
Frequently asked questions
How much does GPT-5.6 Luna cost on OmniaKey?
OmniaKey charges the official rate: $0.2 USD per 1M input tokens and $1.2 USD per 1M output tokens, in USD.
What is the context window for GPT-5.6 Luna?
The listed context window is 1M. Actual usable limits can also depend on the client and upstream request format.
Which coding tools work with GPT-5.6 Luna?
The current catalog lists compatibility with Codex, Cursor, Cline, Aider. Use the model ID shown on this page when the client supports model selection.