OpenAI
GPT-5.6 Luna API pricing
GPT-5.6 Luna is OpenAI’s model on the API market, released 9 Jul 2026. Prices are per million tokens in USD, as last read from the price list.
$0.20Input / 1M
$1.20Output / 1M
1.1MContext
128KMax output
Specification
USD per million tokens- Provider
- OpenAI
- Model id
openai/gpt-5.6-luna- Input
- $0.20
- Output
- $1.20
- Cached input
- $0.020
- Context window
- 1.1M tokens
- Maximum output
- 128K tokens
- Takes
- file, image, text
- Returns
- text
- Tool use
- Yes
- Reasoning
- Yes
- Released
- 9 Jul 2026
- First tracked
- 17 Sept 2026
At $0.20 per million input tokens, GPT-5.6 Luna is dearer than 97 of the 326 models on the price list.
Price changes
Tracked since 17 Sept 2026No price change has been recorded since tracking began on 17 Sept 2026. Prices are checked every six hours, and any change is listed here and on model changes.
Coverage
2 stories- OpenAI News ·Replit expands access to software creation with GPT-5.6 Luna
- OpenAI News ·Improving GPT‑5.6 Sol in ChatGPT—and expanding access to GPT-5.6 Luna for free users
Other entries for this model
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- GPT-5.6 Luna Pro$0.20 in · $1.20 out
Prices and specifications come from OpenRouter’s catalogue, last read 17 Sept 2026. A provider’s own price may differ; how this is collected.