GPT-6.1 Luna release date

GPT-6.1 now has Sol and Terra tiers. A cheaper Luna tier is a guess with weak evidence.

RumorOpenAISmaller, cheaper AI modelUpdated Oct 26, 2026
Download GPT-6.1 LunaGoes live on launch day, expected Nov 20, 2026

Last checked 2 min ago.

Expected launch dateNov 20, 2026Launches in 24 days
30%chance it launches between Nov 2026 and Nov 2026
Most likely Nov 20
Today
Earliest Nov 2, 2026Latest Nov 30, 2026

What GPT-6.1 Luna will offer

  • A cheaper, faster version of GPT-6.1 SolOur guess
  • Same API features as Sol, including agentsOur guess
  • Low confidence: OpenAI may skip itOur guess
RumorExpectedOut nowReviewedOn launch day this page turns into a full first look, then a hands-on review, at the same address.

About GPT-6.1 Luna

GPT-6 shipped with Sol and Luna tiers, and GPT-6.1 Sol followed on 29 September. A GPT-6.1 Luna would fill the obvious gap. The evidence is thin: tier names exist for only two versions, and dates in OpenAI's developer toolkit (SDK) can lag real launches. We give it about 30% for November and about 55% by the end of the year.

Details we expect

ItemWhat we expectSource type
ReleaseNovember at the earliest. About 55% by 31 DecemberOur guess
RoleCheaper, faster sibling of GPT-6.1 SolOur guess
PriceUnknownOur guess

Still unknown

  • Whether OpenAI makes a 6.1 Luna at all
  • Price and how much it can read at once

Related models

GPT-7

OpenAI

GPT-6 arrived in September 2026. Markets put GPT-7 in mid 2027.

Expected Jul 2027Rumor

GPT-6.1 Sol

OpenAI

Replaced GPT-6 Sol a week after launch, at a lower price.

Launched Sep 29, 2026Out now

GPT-6.1 Terra

OpenAI

OpenAI says it is close to GPT-6 Astra on many tasks for a tenth of the price per token, at $1 in and $5 out.

Launched Oct 26, 2026Out now