GPT-6 Luna: release date and what it's for
Released , according to OpenAI's announcement. The cheap GPT-6, at ten cents a million in. Oddly, it has the newest knowledge cutoff of the three: May 18, 2026.
- Status
- Live
- Released
- Lab
- OpenAI
- Input
- $0.10per million tokens
- Output
- $0.50per million tokens
- Context window
- 1.05Mtokens
- Max output
- 128Ktokens
API model ID: gpt-6-luna
What is GPT-6 Luna capable of?
6 posts from people showing what they made with GPT-6 Luna, newest and most-reacted first. People are posting video, image and game made with it.
Each card is the original post, shown the way X or Reddit embeds it, with a link to where it came from. We picked the ones that show something being made and skipped the benchmark screenshots. We can't vouch for any of them being unedited.
What we've written about GPT-6 Luna
OpenAI says a GPT-6 Astra agent removed a safety monitor, then denied it
A second agent, on GPT-6.1 Sol, cut alerts to OpenAI's Security team because a researcher had asked for no Slack messages.
OpenAI says GPT-6.1 Sol scores 86.6% on its COBOL migration test, up from 5.4%
The test only passes a rewrite whose output matches the old program byte for byte, down to how it rounds money.
Claude Haiku 5.5 cuts prices up to 90% and tops GPT-6 Luna in Anthropic's own tests
Most requests now cost a tenth of what Haiku 4.5 charged, and the small model gets an effort dial for the first time.
OpenAI puts GPT-6 in ChatGPT for everyone, and its answers can now include charts and buttons
Ask ChatGPT for a bill splitter and it builds one in the chat, though free users wait a day.
Codex models and plans explained: GPT-6 Astra, Sol and Luna, and which plan gets which
Pick any GPT-6 model you like on your laptop, but a Codex cloud task on a ChatGPT plan still runs on last generation's Sol.
Claude Code vs Codex vs Gemini CLI: which plan you need and which models you get
One of the three stopped serving individual subscribers in June, but its own docs still advertise the free tier it closed.
OpenAI model release dates: o3, GPT-5.5 and GPT-6 Astra, Sol and Luna in order
o3 is from April 2025, and the name Sol now means something different from what it meant in July.
OpenAI's GPT-6 Sol costs a fifth of Astra per token, and Luna a hundredth
Sam Altman says the pair beats the 5.6 models at half the price per token, and OpenAI's own docs still send new users to Astra first.
How GPT-6 Luna compares on price and context
inputoutput
- GPT-6 Astra$10 / $50
- Claude Fable 5.1$10 / $50
- GPT-5.6 Terra$2 / $12
- GPT-6 Sol$2 / $10
- Muse Spark 1.3$1.25 / $4.25
- Gemini 3.8 Flash$0.75 / $3.75
- GPT-6 Luna$0.10 / $0.50
how much it reads at once
- GPT-6 Luna1.05M
- GPT-6 Sol1.05M
- GPT-6 Astra1.05M
- GPT-5.6 Terra1.05M
- Muse Spark 1.31.05M
- Gemini 3.8 Flash1.05M
- Claude Fable 5.11M
Next to the newest OpenAI models and the current model from other labs. Prices are in US dollars per million tokens.
What is GPT-6 Luna?
GPT-6 Luna is a model from OpenAI, built in the US. It's out, and you can use it today.
When did GPT-6 Luna come out?
OpenAI released it on September 22, 2026. That date comes from OpenAI's announcement.
More from OpenAI
GPT-6 Sol
- in /1M
- $2
- out /1M
- $10
- context
- 1.05M
GPT-6 Astra
- in /1M
- $10
- out /1M
- $50
- context
- 1.05M
GPT-5.6 Sol
- in /1M
- $4
- out /1M
- $20
- context
- 1.05M
GPT-5.6 Luna
- in /1M
- $0.20
- out /1M
- $1.20
- context
- 1.05M
GPT-5.5 Pro
- in /1M
- $30
- out /1M
- $180
- context
- 1.05M
GPT-5.5
- in /1M
- $5
- out /1M
- $30
- context
- 1.05M
GPT-5.4 nano
- in /1M
- $0.20
- out /1M
- $1.25
- context
- 400K
GPT-5.4 Mini
- in /1M
- $0.75
- out /1M
- $4.50
- context
- 400K
More news: OpenAI news and ChatGPT updates
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