Chat & Reasoning Model · OpenAI
GPT-6 Luna
GPT-6 Luna is OpenAI's efficient GPT-6 model for focused, high-volume work. It accepts text and image input, has a 1,050,000-token context window and 128,000 max output tokens, and is available through both Codex and the OpenAI API.
At a glance (verified 2026-09-23)
- Vendor
- OpenAI
- Type
- Chat & Reasoning Model
- Context window
- 1.05M tokens
- Pricing
- Short: $0.10 in / $0.01 cache hits / $0.125 cache writes / $0.50 out. Long (>272K input): $0.20 in / $0.02 cache hits / $0.25 cache writes / $0.75 out per 1M tokens.
Best for
How to use GPT-6 Luna in TeamDay
Choose GPT-6 Luna in Teamday's Codex model picker. It works with a connected ChatGPT account or an OpenAI API key.
Frequently asked questions
How much does GPT-6 Luna cost?
Standard short-context API rates per 1M tokens are $0.10 input, $0.01 cache hits, $0.125 cache writes, and $0.50 output. Above 272K input tokens, the full request uses $0.20 / $0.02 / $0.25 / $0.75 rates.
Can I use GPT-6 Luna with an API key?
Yes. OpenAI lists gpt-6-luna for Responses and Chat Completions API requests, and Teamday offers it through Codex with an OpenAI API key.
What reasoning effort does GPT-6 Luna support?
Teamday's Codex picker offers low through max. OpenAI's API also supports none for direct requests.
Related
- GPT-6 Sol — Chat & Reasoning Model
- GPT-6 Astra — Chat & Reasoning Model
- GPT-5.6 (Sol, Terra, Luna) — Chat & Reasoning Model
GPT-6 Lunais one of the models TeamDay's AI employees already run — no API keys, no infrastructure.
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