OpenAI › GPT-6 Luna › Pricing
$0.10 / $0.50per 1M tokens in / out
$0.01cache read · −90%
$0.017per task at medium?
#8on OpenRouter by tokens · 6.1T / week
Price sheetper 1M tokens
| Input | $0.10 | list |
| Output | $0.50 | |
| Cache read | $0.01 | −90% vs input |
| Cache write | $0.13 | +25% vs input |
| Context · max output | 1.1M · 128K | tokens |
Cost per task by effort?
non-thinking$0.0118.6
low$0.00520.3
mediumAPI default$0.01728.3
high$0.02932.9
xhigh$0.04234.3
max$0.06838.5
per taskHumanity's Last Exam
Same price per token at every effort; the bill grows with reasoning tokens. max costs 3.9× medium for +10.2 points.
Where to buy5 providers · per 1M tokens
| Provider | Input | Output | Context |
|---|---|---|---|
| Azure | $0.10 | $0.50 | 1.1M |
| lab-openai | $0.10 | $0.50 | — |
| OpenAIlab | $0.10 | $0.50 | 1.1M |
| openai-media | $0.10 | $0.50 | — |
| Amazon Bedrock | $0.11 | $0.55 | 1.1M |
In OpenAI's line-upper 1M in / out
| GPT OSS 20B | $0.018 / $0.09 | −82% |
| GPT OSS 120B | $0.03 / $0.15 | −70% |
| GPT OSS Safeguard 20B | $0.07 / $0.20 | −49% |
| GPT-6 Luna | $0.10 / $0.50 | this model |
| GPT OSS Safeguard 120B | $0.15 / $0.60 | +31% |
| GPT-5.4 Nano (2026-03-17) | $0.20 / $1.25 | 2.3× |
| GPT-5.4 Mini (2026-03-17) | $0.75 / $4.50 | 8.4× |
Cheaper for the same workvs GPT-6 Luna at medium
| Agnes 2.5 Pro Beta | -25% | score +18% | $0.10 / $0.30 |
| GPT-5.6 Luna medium | -11% | score -16% | $0.016 |
| Ling 3.0 Flash VL thinkingOpen | -55% | score -18% | $0.06 / $0.18 |
| MiMo v2 Omni thinking | -13% | score -20% | $0.14 / $0.28 |
| Ling 3.0 Flash Fin thinkingOpen | -55% | score -24% | $0.06 / $0.18 |
Pricing questions
How much does GPT-6 Luna cost?›
$0.10 per 1M input tokens and $0.50 per 1M output tokens. Cached input is $0.01. One Intelligence Index task costs about $0.017 at the default effort.
Is GPT-6 Luna free to use?›
There is no free API tier.
How much does prompt caching save?›
Cache reads cost $0.01 per 1M, 90% below the input price. Writing to the cache costs $0.13 per 1M.
Is GPT-6 Luna cheaper than GPT-4.1?›
Yes: $0.10 / $0.50 against $2 / $8, 94% less per token.
How does effort change the price?›
The price per token is the same at every effort. Higher effort spends more reasoning tokens: a task costs $0.011 at non-thinking, $0.005 at low, $0.017 at medium, $0.029 at high, $0.042 at xhigh, $0.068 at max.
What is a cheaper alternative to GPT-6 Luna?›
Agnes 2.5 Pro Beta costs -25% per task with a score +18% on Humanity's Last Exam.