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

$0.10 per million input tokens and $0.50 per million output tokens, as listed on OpenRouter on October 21, 2026.

Does GPT-6 Luna support prompt caching?

Yes. OpenRouter lists cached input at $0.01 per million tokens, against $0.10 for uncached input.

Is there a cheaper model as good as GPT-6 Luna?

Ling 3.1 Flash scores 41.1 on the Artificial Analysis Intelligence Index, within two points of GPT-6 Luna or above it, and costs $0.225 per million output tokens.

Has the price of GPT-6 Luna changed?

Not since we started recording it daily on October 15, 2026.

GPT-6 Luna API pricing

As of October 21, 2026, OpenAI GPT-6 Luna costs $0.10 per million input tokens and $0.50 per million output tokens through OpenRouter, with cached input at $0.01 per million.

GPT-6 Luna benchmarks and specs · Every OpenAI model's price

Input, per million tokens$0.10
Output, per million tokens$0.50
Cached input, per million$0.01
Context window1.05M tokens
Max output128K tokens
Output speed133 tok/s

What a request costs

Three fixed token mixes at the list price, without cache or batch discounts. For a whole month, use the calculator.

Cost of three workloads on GPT-6 Luna
Workload	Tokens	One request	1,000 requests	Fits the context window
Chat turn	1K input + 500 output tokens	$0.0003	$0.350	Yes
Repository review	50K input + 3K output tokens	$0.0065	$6.50	Yes
Agent loop	200K input + 10K output tokens	$0.025	$25.00	Yes
Solved coding task	One SWE-bench Verified attempt, divided by the share that succeed	Not computable	Not computable

Price history

We read this price every day and have since October 15, 2026. It has not changed yet; any change will be listed here with its date.

October 15, 2026 First recorded: $0.10 input, $0.50 output

Cheaper models as good as GPT-6 Luna

Models within two points of GPT-6 Luna or above it on the Artificial Analysis Intelligence Index, with a lower output price. Cheapest first.

GPT-6 Luna pricing questions

How much does GPT-6 Luna cost per million tokens?: $0.10 per million input tokens and $0.50 per million output tokens, as listed on OpenRouter on October 21, 2026.
Does GPT-6 Luna support prompt caching?: Yes. OpenRouter lists cached input at $0.01 per million tokens, against $0.10 for uncached input.
Is there a cheaper model as good as GPT-6 Luna?: Ling 3.1 Flash scores 41.1 on the Artificial Analysis Intelligence Index, within two points of GPT-6 Luna or above it, and costs $0.225 per million output tokens.
Has the price of GPT-6 Luna changed?: Not since we started recording it daily on October 15, 2026.