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GPT-5.6 Luna — Model Tracker
GPT-5.6 Luna in the Model Tracker: every value read on the maker's own pages, with its day.
- Maker
- OpenAI — developers.openai.com, read 2026-10-16
- Released
- 2026-07-09 — developers.openai.com, read 2026-10-16
- Status
- Generally available — developers.openai.com, read 2026-10-16
- Retired
- Not confirmed
- Takes
- Text, Image — developers.openai.com, read 2026-10-16
- Returns
- Text — developers.openai.com, read 2026-10-16
- Open weights
- Not confirmed: The cited official model and system-card pages do not state whether GPT-5.6 Luna's weights are open or downloadable.
- Licence
- Not confirmed: The cited official pages do not name a licence for GPT-5.6 Luna.
- Context window
- 1,050,000 tokens — developers.openai.com, read 2026-10-16
- Longest answer
- 128,000 tokens — developers.openai.com, read 2026-10-16
- Knowledge cutoff
- 2026-02-16 — developers.openai.com, read 2026-10-16
- API price, input
- USD 0.2 per 1M tokens — developers.openai.com, read 2026-10-16
- API price, output
- USD 1.2 per 1M tokens — developers.openai.com, read 2026-10-16
- Where
- Not confirmed: two readings disagree: ["api","app","cloud"] and ["api"]
- Parameters
- Not confirmed: The cited official pages do not publish a parameter count for GPT-5.6 Luna.
- Model card
- Not confirmed: two readings disagree: https://deploymentsafety.openai.com/gpt-5-6 and https://developers.openai.com/api/docs/models/gpt-5.6-luna.md
Sources
- GPT-5.6 Luna Model | OpenAI API (read 2026-10-16)
- Changelog | OpenAI API (read 2026-10-16)
- GPT-6 and other models in ChatGPT (read 2026-10-16)
- OpenAI on Amazon Bedrock (read 2026-10-16)
- GPT-5.6 System Card (read 2026-10-16)