# GPT-6 Luna

Model tracker · checked 2026-10-15 · https://dbggr.dev/models/gpt-6-luna/

GPT-6 Luna is a fast model from OpenAI, released 22 September 2026. At OpenAI it costs $0.10 per million input tokens and $0.50 per million output tokens, with a 1.1M-token context window.

- Made by: OpenAI
- Released: 2026-09-22
- Status: Generally available, new
- Tier: Fast
- Weights: Closed
- Context window: 1,050,000 tokens
- Max output: 128,000 tokens
- Input: text, image
- API id: gpt-6-luna
- Docs: https://developers.openai.com/api/docs/models/gpt-6-luna

## GPT-6 Luna price at OpenAI

US dollars per million tokens. Blended is 3 input tokens for every output token, one number to compare on.

| Provider | Input | Output | Cached input | Blended | Batch | Checked |
|---|---|---|---|---|---|---|
| OpenAI | $0.10 | $0.50 | $0.01 | $0.20 | 50% off | [2026-10-15](https://developers.openai.com/api/docs/pricing) |

- OpenAI: Prompts over 272K input tokens cost 2x input and cache, 1.5x output for the whole request. Cache writes 1.25x input. Flex is also 50% off; Fast mode costs 2x. Regional (data residency) endpoints +10%.

## GPT-6 Luna benchmarks

| Benchmark | Score | What it measures | Reported by |
|---|---|---|---|
| LMArena text score | 1443 | Elo-style score from people voting between answers | [Independent](https://arena.ai/leaderboard/text) |

Scores reported by a model's maker aren't independently checked.

## Models like GPT-6 Luna

| Model | Input | Output | Context | Weights |
|---|---|---|---|---|
| GPT-6 Luna | $0.10 | $0.50 | 1.1M | Closed |
| [Claude Haiku 5.5](https://dbggr.dev/models/claude-haiku-5-5/) | $0.10 | $0.50 | 1M | Closed |
| [Ministral 3 14B](https://dbggr.dev/models/ministral-3-14b/) | $0.20 | $0.20 | 256K | Open |
| [Gemma 4 31B](https://dbggr.dev/models/gemma-4-31b/) | $0.14 | $0.40 | 256K | Open |
| [Qwen3.8 Flash](https://dbggr.dev/models/qwen3-8-flash/) | $0.15 | $0.47 | 1M | Closed |
| [GLM-5.3 Flash](https://dbggr.dev/models/glm-5-3-flash/) | $0.15 | $0.50 | 1M | Open |

## FAQ

### How much does GPT-6 Luna cost?

GPT-6 Luna costs $0.10 per million input tokens and $0.50 per million output tokens at OpenAI, and $0.01 per million cached input tokens, with 50% off for batch requests. Prices are list prices in US dollars, last checked 15 October 2026.

### What is GPT-6 Luna's context window?

GPT-6 Luna takes up to 1,050,000 tokens in one request and writes up to 128,000 tokens in one response.

### Is GPT-6 Luna open weight?

No. GPT-6 Luna is only available through OpenAI's API; OpenAI doesn't publish the weights.

### Where can I use GPT-6 Luna?

GPT-6 Luna is available from OpenAI. At OpenAI, call it as `gpt-6-luna`.