LONG MEMORY · OpenAI
GPT-5.6 Luna
GPT-5.6 Luna is a reasoning, tool-using model from OpenAI in the GPT family, living in Snow Country (long memory). It reads text, files and images and writes text, with a 1.05M-token context window and up to 128K tokens of output. On OpenRouter it costs $0.200 per million input tokens and $1.20 per million output tokens.
See GPT-5.6 Luna in 3DOpen in the WorktableView on OpenRouter
Specifications
- Provider
- OpenAI
- Family
- GPT
- Province
- Snow Country
- Context window
- 1.05M tokens
- Maximum output
- 128K tokens
- Input / 1M tokens
- $0.200
- Output / 1M tokens
- $1.20
- Accepts
- text, files, images
- Produces
- text
- Reasoning
- Yes
- Tool use
- Yes
- Added to OpenRouter
- 2026-07-09
- Model ID
openai/gpt-5.6-luna- Price history
- —All recorded prices
From the 2026-10-24 catalog snapshot. Prices are US dollars per million tokens.
More GPT models
- GPT-6 Luna1.05M · $0.100 / $0.500
- GPT-4.11.05M · $2.00 / $8.00
- GPT-4.1 Mini1.05M · $0.400 / $1.60
- GPT-4.1 Nano1.05M · $0.100 / $0.400