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AI model · OpenAI

GPT-6 Sol and Luna

OpenAI released GPT-6 Sol and Luna on 22 Sep 2026. API list price: GPT-6 Sol: $2.00 per million input tokens and $10.00 per million output tokens; GPT-6 Luna: $0.10 per million input tokens and $0.50 per million output tokens. GPT-6 Sol is not on ChatGPT’s free plan.

The record

each fact with its source

Released

22 Sep 2026

Two GPT-6 models released together The lab’s announcement

API list price, per million tokens

GPT-6 Sol

$2.00 in $10.00 out

Standard tier, prompts up to 272K tokens. Cached input $0.20.

GPT-6 Luna

$0.10 in $0.50 out

Standard tier, prompts up to 272K tokens. Cached input $0.01.

OpenAI’s pricing page, read 23 Oct 2026

On the free plan?

Not included

Current ChatGPT pricing marks GPT-6 Sol as unavailable on Free. Source

The Access Gap, checked 3 Oct 2026

OpenAI’s other recent models

data through 30 Oct 2026

  1. 26 Oct 2026 GPT-6.1 Terra Fast, efficient model for visual reasoning, computer use and writing, released in the API; rollout to ChatGPT Work and Codex for Plus and higher plans began the same day
  2. 29 Sep 2026 GPT-6.1 Sol Lower-cost professional and agentic model released in the API; rollout to ChatGPT Work and Codex began the same day
  3. 4 Sep 2026 GPT-6 Astra First GPT-6 model; wide availability a day after a limited start
  4. 9 Jul 2026 GPT-5.6 (Sol / Terra / Luna) Three price-performance tiers, GA across ChatGPT, Codex and the API
  5. 5 May 2026 GPT-5.5 Instant ChatGPT’s new default for everyone, the tier just below GPT-5.5 Thinking; on the API as chat-latest
  6. 17 Mar 2026 GPT-5.4 mini GPT-5.4’s mini, at $0.75 in and $4.50 out, released to the API with GPT-5.4 nano; third that day, below GPT-5.4 and GPT-5.3 Instant
  7. 3 Mar 2026 GPT-5.3 Instant ChatGPT’s new default for everyone, the tier just below Thinking; on the API as gpt-5.3-chat-latest

GPT-6 Sol and Luna in OpenAI’s full release log · its row on the release chart

Release dates and notes come from the site’s release record, data through 30 Oct 2026; each links the lab’s own announcement. Prices are list prices as the lab’s pricing page printed them on the day shown, before any discount. Something wrong? Tell us.