How much does GPT-6 Luna cost per month?

For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-6 Luna costs about $105.00 per month at the provider's official prices (verified) ($0.10 per 1M input tokens, $0.50 per 1M output tokens).

Does GPT-6 Luna support prompt caching?

Yes. Cached input costs $0.01 per 1M tokens, compared with $0.10 for regular input. Writing to the cache costs $0.125 per 1M tokens.

How long is GPT-6 Luna's context window?

GPT-6 Luna accepts up to 1,050,000 tokens (1.05M) of context and returns up to 128,000 tokens per response.

Does GPT-6 Luna have a batch price?

Yes. Asynchronous batch requests cost $0.05 per 1M input tokens and $0.25 per 1M output tokens.

GPT-6 Luna API Pricing

OpenAI · released Sep 22, 2026 · 1.05M context · API model ID gpt-6-luna

GPT-6 Luna by OpenAI API pricing: $0.10 per 1M input tokens and $0.50 per 1M output tokens (verified against the official pricing page, Oct 9, 2026).

Prices

GPT-6 Luna prices, USD per 1M tokens
Price	USD per 1M tokens
Input	$0.10
Output	$0.50
Cache read	$0.01
Cache write	$0.125
Batch input	$0.05
Batch output	$0.25

Verified against the provider's official pricing page on Oct 9, 2026. Official pricing page

Estimated monthly cost

$105.00

per month

per day: $3.50
per request: $0.00035

Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.

Compare this workload across models

Long-context prices

Prompts longer than the threshold are billed at a higher rate.

Prompts over	Input	Output	Cache read	Cache write
272,000 tokens	$0.20	$0.75	$0.02	$0.25

Monthly cost by workload

Workload	Per month
Chatbot1,000 in / 500 out tokens, 10,000 requests a day	$105.00/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day	$157.50/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input	$72.00/mo

Context and capabilities

Context: 1,050,000 tokens
Max output: 128,000 tokens
Input: text, image, pdf
Output: text
Knowledge cutoff: May 18, 2026
Open weights: No
Tool calling: Yes
Reasoning: Yes
Structured outputs: Yes

Capabilities and limits as listed by models.dev.

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Price history

No price changes since we started tracking on Oct 8, 2026.

Questions

How much does GPT-6 Luna cost per month?: For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, GPT-6 Luna costs about $105.00 per month at the provider's official prices (verified) ($0.10 per 1M input tokens, $0.50 per 1M output tokens).
Does GPT-6 Luna support prompt caching?: Yes. Cached input costs $0.01 per 1M tokens, compared with $0.10 for regular input. Writing to the cache costs $0.125 per 1M tokens.
How long is GPT-6 Luna's context window?: GPT-6 Luna accepts up to 1,050,000 tokens (1.05M) of context and returns up to 128,000 tokens per response.
Does GPT-6 Luna have a batch price?: Yes. Asynchronous batch requests cost $0.05 per 1M input tokens and $0.25 per 1M output tokens.