# OpenAI: GPT-5.6 Luna

Provider: openai  
Category: llm  
Model ID: `openai/gpt-5.6-luna`

GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...

## Specs

- Context length: 1050000 tokens
- Max output: 128000 tokens
- Modalities: file, image, text
- Released: 2026-07-09

## Pricing

- Input: $1.00 per million tokens
- Output: $6.00 per million tokens

## Verdict

GPT-5.6 Luna offers OpenAI's largest context window yet at 1.05M tokens, making it the go-to choice for processing entire codebases, legal document sets, or multi-hour meeting transcripts in a single pass. The $1/$6 per Mtok pricing undercuts GPT-4o significantly while maintaining multimodal support across text, images, and files. Reach for this when context length is your bottleneck and you need OpenAI's API reliability, but expect to wait for public benchmarks before trusting it on reasoning-heavy tasks where Claude or o1 currently lead.

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Last verified: 2026-07-10T02:00:04.178Z  
Canonical URL: https://switchy.build/directory/models/gpt-5-6-luna