GPT-6 Luna Pro
Pricing updated daily · Last refreshed Oct 29, 2026OpenAI model with a 1.05M-token context window, priced at $0.10 per million input tokens and $0.50 per million output tokens.
At a glance
- Provider
- OpenAI
- Context window
- 1,050,000 tokens
- Max output
- 128,000 tokens
- Input price
- $0.10 / 1M tokens
- Output price
- $0.50 / 1M tokens
- Input types
- image, text
- Function calling
- Yes
- Released
- September 22, 2026
What it costs
Illustrative request sizes, not measurements of any real product. For your own volumes, use the cost estimator.
| Workload | Tokens in / out | Per request | Per 1,000 requests |
|---|---|---|---|
| Short chat reply | 1,000 / 500 | $0.000350 | $0.3500 |
| Question over retrieved documents | 8,000 / 500 | $0.0011 | $1.05 |
| Summarise a long document | 50,000 / 1,500 | $0.0058 | $5.75 |
How it compares
- Input price ($0.10 per 1M tokens) is the 3rd lowest of 30 models in the catalogue.
- Output price ($0.50 per 1M tokens) is the 7th lowest of 30.
- Context window (1.05M tokens) is the 2nd largest of 30.
- Maximum output (128K tokens) is the 7th largest of 30.
- On blended price it is 90% cheaper than the median OpenAI model in the catalogue.
These are rankings by listed price and size within this catalogue (blended price weights input 3:1 against output), not a measure of output quality.
Cheaper models with the same capabilities
Lower blended price, at least the same context window, and the same input types and function calling.
| Model | Provider | Context | Input $/1M | Output $/1M |
|---|---|---|---|---|
| Llama 4 Scout | Meta | 1.31M | $0.10 | $0.30 |
More from OpenAI
| Model | Provider | Context | Input $/1M | Output $/1M |
|---|---|---|---|---|
| GPT-6.1 Terra | OpenAI | 1.05M | $1.00 | $5.00 |
| GPT-6.1 Terra Pro | OpenAI | 1.05M | $1.00 | $5.00 |
| GPT-6.1 Sol | OpenAI | 1.05M | $2.00 | $10.00 |
| GPT-6.1 Sol Pro | OpenAI | 1.05M | $2.00 | $10.00 |
Try it with your own text
- Token counter: see how many tokens a prompt uses (exact for OpenAI models, labelled estimates for others).
- Context window visualizer: see how much of this model’s 1.05M window a prompt fills.
- Model comparison: sort and filter every model, and export to CSV.
Source: OpenRouter’s public model catalogue (openai/gpt-6-luna-pro), read once a day. These are the prices OpenRouter charges; a provider’s own list price can differ, so check the provider before committing to a budget.