AiGanakGPT-6 Luna API pricing
GPT-6 Luna costs $0.1 per million input tokens and $0.5 per million output tokens at OpenAI's standard list price, checked 26 October 2026. One typical support answer costs about $0.00049.
GPT-6 Luna (OpenAI) costs $0.1 input, $0.01 cached input and $0.5 output per million tokens at standard list price, checked 26 October 2026. Batch: $0.05 input and $0.25 output. A typical support answer costs $0.00049.
GPT-6 Luna price per million tokens
Model ID gpt-6-luna. Source: OpenAI's pricing page, checked 26 October 2026. AiGanak re-checks every price weekly.
| Standard | Batch | |
|---|---|---|
| Input | $0.1 | $0.05 |
| Cached input | $0.01 | $0.005 |
| Output | $0.5 | $0.25 |
- Writing to the prompt cache costs $0.125 per million tokens.
- Prompts over 272K input tokens cost 2x input and cache rates and 1.5x output for the whole request. Long-prompt rates: $0.2 input, $0.75 output.
- Batch requests return within 24 hours at the batch rate.
What GPT-6 Luna costs per request
Token counts are stated so you can check the arithmetic.
| Task | Tokens | Per request | Per 1,000 | $100 buys |
|---|---|---|---|---|
| Chat reply | 2,000 input tokens, none cached, 300-token reply | $0.00035 | $0.350 | 285,714 |
| Support answer | 6,000 input tokens (4,000 cached instructions and help text), 500-token answer | $0.00049 | $0.490 | 204,081 |
| Document summary | 20,000-token document, no caching, 800-token summary | $0.00240 | $2.40 | 41,666 |
GPT-6 Luna compared with similar models
Cost of the same support answer (6,000 input tokens (4,000 cached instructions and help text), 500-token answer). Cheaper is not better unless quality holds on your own examples.
| Model | Input / output per 1M | Support answer | vs GPT-6 Luna |
|---|---|---|---|
| Claude Haiku 5.5 | $0.1 / $0.5 | $0.00049 | same |
| GPT-6 Luna | $0.1 / $0.5 | $0.00049 | — |
| Gemini 3.1 Flash-Lite | $0.25 / $1.50 | $0.00135 | 176% dearer |
| Gemini 3.5 Flash-Lite | $0.3 / $2.50 | $0.00197 | 302% dearer |
See every model on one page in the LLM Price Index, or upload your bill to the free LLM Bill Analyzer to see what GPT-6 Luna costs you and what you could save.
GPT-6 Luna pricing questions
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How much does GPT-6 Luna cost per million tokens?
GPT-6 Luna costs $0.1 input, $0.01 cached input and $0.5 output per million tokens at OpenAI's standard list price, checked 26 October 2026. Batch processing costs $0.05 input and $0.25 output per million tokens. Writing to the prompt cache costs $0.125 per million tokens. Prompts over 272K input tokens cost 2x input and cache rates and 1.5x output for the whole request.
How much does one request cost on GPT-6 Luna?
A support answer with 6,000 input tokens (4,000 of them cached) and a 500-token reply costs about $0.00049, or $0.490 per 1,000 answers, at standard list prices.
Is GPT-6 Luna getting more expensive?
No price change was announced on OpenAI's pricing page when AiGanak checked it on 26 October 2026. AiGanak re-checks prices weekly and emails alerts when one changes.
What is a cheaper alternative to GPT-6 Luna?
Among small models from OpenAI, Anthropic and Google, Claude Haiku 5.5 is the cheapest for the same support answer at $0.00049 per request, against $0.00049 on GPT-6 Luna. Test quality on your own examples before switching.
Get an email when GPT-6 Luna or any other LLM price changes
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