How much does GPT-6 Luna cost?

Through the API GPT-6 Luna costs $0.1 per million input and $0.5 per million output tokens (price list as of 15/10/2026).

When was GPT-6 Luna released?

GPT-6 Luna by OpenAI was released on 22/09/2026.

← Model leaderboard

GPT-6 Luna

OpenAIReleased 22/09/2026

Loads without errors5/5#1 of 26

Tech. quality96/100#6 of 26

UX79/100#21 of 26

Total cost$0.048

Average time1 min 29 s#5 of 26

Total tokens1,187,622

API price: $0.1 / $0.5 per 1M input / output tokens · as of 15/10/2026 source ↗

What is GPT-6 Luna good for?

OpenAI's most efficient model for focused, high-volume, cost-sensitive tasks.

Description based on the maker · source ↗

Maker: OpenAI
Released: 22/09/2026
Context window: 1.05M tokens
Model weights: closed, the model is available through the API only
Reasoning levels: low medium high

How did GPT-6 Luna do in the AI Lab tests?

5 of 5 outputs load without errors.
Its best technical result was on the “Monitor test” prompt (100/100).
In the objective perft chess test it passed 3 of 6 positions.
Average time per prompt 1 min 29 s#5 of 26
Average cost per prompt $0.00963#4 of 26
Technical quality 96/100#6 of 26
Automatic UX rating 79/100#21 of 26

Tech. quality98 UX62 Time1 min 22 s Cost$0.00800

Compare →

Cost = tokens priced with the API price list valid on the date shown next to the cost (prices change). ≈ = estimate (only the total token count is known), no ≈ = exact from input / output tokens. “Loads” = the page opens without errors; technical quality also checks behaviour during use – judge the quality in the viewer.