GPT-6 Luna

Developers can use it through the API for coding tasks in a range of programming languages at a lower estimated evaluation cost than GPT-5.6 Sol.

Availability

Try our latest models through the API

Pricing model

API cost

Deployment

OpenAI API, ChatGPT Work, Codex, and the desktop app.

Privacy

Not established

Licence

Not established

• ChatGPT can create tools such as calculators, bill splitters, and games in a conversation.
• The rollout starts globally for Plus, Pro, Business, and Enterprise tiers, with Free and Go to follow tomorrow.
• The update applies to the Chat experience in ChatGPT.
• Responses can include graphics, tappable buttons, forms, charts, and interactive experiences.
• Enterprise availability depends on workplace admin settings.
• GPT-6 Luna at max effort exceeds GPT-5.6 Sol at medium effort on OSWorld 2.0 offline. ^[2]

  On **OSWorld 2.0 offline**, GPT‑6 Sol at xhigh effort achieves a similar score to Claude Opus 5 at medium effort—60.5% versus 60.3%—at approximately 80% lower cost per task.

• GPT-6 Luna is available in the OpenAI API as gpt-6-luna. ^{[2] [3]}

  In the OpenAI API, they are available as `gpt-6-sol` and `gpt-6-luna`.

• Free and Go users can access GPT-6 Luna in the desktop app. ^[2]

  Free and Go users can access GPT‑6 Luna in the desktop app.

• GPT-6 Luna API pricing is $0.10 per 1 million input tokens and $0.50 per 1 million output tokens. ^{[2] [3] [5]}
• GPT-6 Luna at max effort scores 66.6% on DeepSWE v1.1. ^[2]

  GPT‑6 Luna at max effort scores 66.6%, comparable to Claude Opus 5 and Fable 5 at medium effort.

• GPT-6 Luna reaches an average test pass rate of 40.3% across 20 languages at maximum reasoning effort. ^[4]

  At maximum reasoning effort, GPT‑6 Astra achieves an average test pass rate of 87.4% across the 20 languages, up from 26.8% for GPT‑5.6 Sol.

• GPT-6 Luna improves on GPT-5.6 Sol in every language tested. ^[4]

  GPT‑6 Luna offers a lower-cost option that also improves on GPT‑5.6 Sol in every language tested.

• GPT-6 Luna's estimated average API cost is $0.77 per sample, compared with $3.48 for GPT-5.6 Sol. ^[4]

  These improvements come at an estimated average API cost of $0.77 per sample, compared with $3.48 for GPT‑5.6 Sol, approximately 78% lower.

• GPT-6 Luna is available through the API.

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