Model tracker / OpenAI
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
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 · maker | $0.10 | $0.50 | $0.01 | $0.20 | 50% off | 2026-10-15 |
- 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 |
Scores reported by a model's maker aren't independently checked.
Models like GPT-6 Luna
Other fast models closest in price, at each maker's own price or the cheapest provider.
| Model | Input | Output | Context | Weights |
|---|---|---|---|---|
| GPT-6 Luna | $0.10 | $0.50 | 1.1M | Closed |
| Claude Haiku 5.5 Anthropic | $0.10 | $0.50 | 1M | Closed |
| Ministral 3 14B Mistral AI | $0.20 | $0.20 | 256K | Open |
| Gemma 4 31B Google | $0.14 | $0.40 | 256K | Open |
| Qwen3.8 Flash Alibaba | $0.15 | $0.47 | 1M | Closed |
| GLM-5.3 Flash Z.ai | $0.15 | $0.50 | 1M | Open |
Compare them all in the model tracker →
GPT-6 Luna on dbggr
- Eight US states sue OpenAI as the EU opens its first AI Act test case over lab agents Daily, 2026-10-14
- Voice AI compared: speech-to-text, text-to-speech and voice agents from ElevenLabs, OpenAI, Google and 20 others (October 2026) Article, 2026-10-13
- Haiku 5.5 and four-cent decision models: the AI price war reaches the bottom tier Saturday edition, 2026-10-10
- Microsoft enters decision models at Jev's price as TypeSafe raises $870M Daily, 2026-10-09
- Claude Haiku 5.5 launches at $0.10 per million tokens, matching GPT-6 Luna Daily, 2026-10-07
- OpenAI publishes 722 AI-written math papers, claiming proofs of the quasi-Riemann hypothesis and Unique Games Daily, 2026-10-06
- Anthropic commits $11.6B to Akamai's cloud, for CPUs Daily, 2026-09-24
GPT-6 Luna 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.