GPT-6 Luna Pro API Pricing — $0.10/M input, $0.50/M output

Elite efficient GPT-6: stronger reasoning than Luna for demanding high-volume tasks.

Full specs, context window and API limits →

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

GPT-6 Luna Pro, from OpenAI, charges $0.10 per million input tokens and $0.50 per million output tokens — $0.20 per million blended at a 3:1 input:output ratio. That makes it pricier than GPT-6 Luna on a blended-token basis.

Verified 2026-09-26 — source

Input

$0.10/M

Output

$0.50/M

Blended

$0.20/M

Provider

OpenAI

Verified 2026-09-26 — source

How much does GPT-6 Luna Pro cost per 1,000 requests?

Computed from generated token pricing. Each row assumes the listed input and output tokens per request; this model has no measured verbosity factor, so the unadjusted output estimate is shown.

Request shape	Input tokens	Output tokens	Cost / 1,000 requests
Short	100	50	$0.0350
Medium	1,000	500	$0.3500
Long	4,000	2,000	$1.4000

Formula: ((input price × input tokens) + (output price × output tokens × verbosity factor)) ÷ 1,000,000 × 1,000. Assumptions: short 100/50, medium 1,000/500, long 4,000/2,000 input/output tokens per request. Unadjusted — no measured verbosity factor is available.

How fast is GPT-6 Luna Pro?

Not yet measured — see the speed benchmark leaderboard for models we do track.

How much does GPT-6 Luna Pro cost at scale?

Tokens / month	Est. cost (blended 3:1)
100,000	$0.02
1,000,000	$0.20
10,000,000	$2.00
100,000,000	$20.00

How does GPT-6 Luna Pro compare with other models?

GPT-5 Nano — $0.14/M GPT-6 Luna — $0.20/M GPT-4o Mini — $0.26/M GPT-5.4 Nano — $0.46/M GPT-5 Mini — $0.69/M GPT-6 Luna — $0.20/M Gemini 2.5 Flash Lite — $0.18/M Ministral 8B — $0.15/M

See all OpenAI models →

What is GPT-6 Luna Pro best for?

#2 for Image Understanding#3 for Long Documents & RAG#3 for Summarization

Looking for a cheaper option?

Ministral 8B is 25% cheaper — a config migration. See all 8 alternatives to GPT-6 Luna Pro →

What are common questions about GPT-6 Luna Pro?

Is GPT-6 Luna Pro cheaper than GPT-6 Luna?

GPT-6 Luna Pro costs $0.20/M blended tokens, GPT-6 Luna costs $0.20/M — GPT-6 Luna is cheaper.

How much does 1 million tokens cost with GPT-6 Luna Pro?

At a 3:1 input:output ratio, 1 million blended tokens costs approximately $0.20. Pure input costs $0.10/M; pure output costs $0.50/M.

What does GPT-6 Luna Pro cost at high volume?

At 100 million blended tokens a month, GPT-6 Luna Pro costs approximately $20.00. See the cost-at-scale table below for other volumes.