Catalog
OpenAI
GPT-5.6 Luna
Fast, low-cost GPT-5.6 tier
ReportedJuly 9, 2026 (reported)
- Main purpose
- High-volume, latency-sensitive chat
- Context window
- Not publicly confirmed
- API pricing
- $0.20 input / $1.20 output per 1M tokens after July 30, 2026 cut (reported)
- Access
- ChatGPT, OpenAI API
Capabilities
Tags
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Key features
- Lowest-cost GPT-5.6 tier
- Built for speed
Notes
- Press summaries after the July 30, 2026 OpenAI price cut list Luna at $0.20 / $1.20 per 1M tokens.
Limitations
- Lowest capability of the GPT-5.6 trio by OpenAI’s own tiering.
Pricing from August 2026 press/trackers. Confirm on OpenAI’s pricing page.
Vendor source