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OpenAI GPT-6 Luna Pro API pricing

Token prices on OpenRouter and at the provider’s list price, and what your own workload would cost per month.

Input
$0.10
Output
$0.50
Cached input
$0.01

OpenRouter, per 1M tokens. A dash means no listed price.

Your monthly cost

Your workload

90M input and 18M output tokens a month (30-day month; token counts are per request).

Assumes: 1,000 conversations a day, each sending about 3,000 tokens of history and instructions and receiving about 600 tokens of replies.

Input not in cache
$9.00
Output
$9.00
Total per month
$18.00
Per day
$0.60
Per request
$0.0006
Unit
Currency

The share you mark as “from cache” is billed at this model’s published cache-read price. Cache-write charges are not included. Compare this bill with other models.

Every price, with its source

OpenRouter price, per 1M tokens

Input
$0.10
Output
$0.50
Cached input (read)90% below the input price
$0.01
Cache write
$0.125
Batch (input / output)
$0.05 / $0.25
Context window
1,050,000 tokens
Maximum output
128,000 tokens
Accepts
file, image, text
Reasoning mode
yes
Listed since
22 Sep 2026

No provider list price is recorded for this model: the figures above are what OpenRouter charges, which can differ from buying directly.

Collected from the OpenRouter models API (466 entries). 99 models are cross-checked against provider list prices in the LiteLLM price table.

About GPT-6 Luna Pro

GPT-6 Luna Pro is the same underlying model as [GPT-6 Luna](https://openrouter.ai/openai/gpt-6-luna), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...

Description supplied by OpenRouter. Model id for the API: openai/gpt-6-luna-pro

Other OpenAI models

Questions and answers

How much does OpenAI GPT-6 Luna Pro cost per million tokens?

At the collection of 3 Oct 2026, 08:40 UTC, OpenRouter listed OpenAI GPT-6 Luna Pro at $0.10 per million input tokens and $0.50 per million output tokens.

What would OpenAI GPT-6 Luna Pro cost per month?

For 1,000 requests a day with 3,000 input and 600 output tokens each, over a 30-day month and with no caching, the bill is $18.00. Change the numbers in the simulator on this page to match your own traffic.

Does OpenAI GPT-6 Luna Pro have a cheaper price for cached input?

Yes. Cached input is listed at $0.01 per million tokens, 90% below the normal input price.

What is the context window of OpenAI GPT-6 Luna Pro?

1,050,000 tokens, with a maximum output of 128,000 tokens, as reported by OpenRouter.

Is there a batch price for OpenAI GPT-6 Luna Pro?

Yes. OpenRouter lists a batch variant at $0.05 per million input tokens and $0.25 per million output tokens, for requests that can wait for an asynchronous answer.

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