OpenAI · API model
GPT-6 Luna
API id gpt-6-luna prices checked
- Input
- $0.10/1M
- Output
- $0.50/1M
- Context
- 1.05Mtokens
- Max output
- 128Ktokens
- Knowledge cutoff
- May 2026
- Typical request
- $0.000
Pricing
US dollars per 1 million tokens. A typical request (1,000 input + 500 output tokens) costs $0.000 at standard rates.
| Rate | Input | Cached input | Output |
|---|---|---|---|
| Standard | $0.10 | $0.010 | $0.50 |
| Long promptsPrompts over 272K tokens | $0.20 | $0.020 | $0.75 |
| BatchAsynchronous, results within 24 hours | $0.050 | — | $0.25 |
| FlexLower price, slower responses | $0.050 | — | $0.25 |
| PriorityFast mode, 2x standard | $0.20 | — | $1.00 |
Capabilities and limits
| Context window | 1.05M tokens |
|---|---|
| Max output | 128K tokens |
| Input | TextImages |
| Output | Text |
| Reasoning | Adjustable effort |
| Tool use | Yes |
| Structured output (JSON) | Yes |
| Knowledge cutoff | May 18, 2026 |
Lifecycle status
No deprecation or shutdown date announced on OpenAI's official deprecations page as of Oct 23, 2026.
Change history
Launches, price changes and retirements for GPT-6 Luna, newest first, each linked to the vendor's notice.
GPT-6 becomes the default model in ChatGPT
GPT-6 Sol on paid plans, GPT-6 Luna on Free and Go (from October 8). The Pro reasoning option uses GPT-6 Astra.
vendorOpenAI
GPT-6 Sol ($2 / $10) and GPT-6 Luna ($0.10 / $0.50) released
OpenAI calls them direct successors to GPT-5.6 Sol and Luna at 50% lower prices.
vendorOpenAI
Benchmarks and speed
Not collected yet. Scores will come only from independent leaderboards, each shown with its source and test date.
Planned: GPQA Diamond, SWE-bench Verified, AIME 2025, LMArena Elo, output speed and time to first token.
Where these numbers come from
Every value is an observation with a source and a date. independent is a third-party catalog, vendor is the model maker's own page, derived is our calculation.
| Field | Value | Source | Observed |
|---|---|---|---|
| Standard price, input / output | $0.10 / $0.50 | vendorOpenAI API pricing | Oct 17, 2026 |
| Standard price, input / output | $0.10 / $0.50 | independentLiteLLM | Oct 17, 2026 |
| Standard price, input / output | $0.10 / $0.50 | independentOpenRouter | Oct 17, 2026 |
| Context window / max output | 1,050,000 / 128,000 tokens | vendorOpenAI model docs | Oct 17, 2026 |
| Release date | 2026-09-22 | vendorOpenAI API changelog | Oct 17, 2026 |
| Position in the family | Direct successor to GPT-5.6 Luna at half the price | vendorOpenAI launch post | Oct 17, 2026 |