GPT-6 Sol/Luna leak roundup: rumored Tuesday launch, pricing halved

On September 22, anonymous leaker scaling01 posted that OpenAI's next-generation models GPT-6-Luna and GPT-6-Sol are "coming soon," hinting OpenAI may adopt a dual-version naming scheme; the account later added "Azure had a little mishap," leading observers to speculate the model names and release plans leaked early via the Azure platform. The account also casually noted Qwen4 is quite close.

Confirmed

All of the above comes from the leaker account and media retellings; there is no officially confirmed information from OpenAI so far.

Unconfirmed

A leak relayed by danielmac8 claims OpenAI is in the final preparation stage for releasing GPT-6 Sol and Luna, with the Terra tier to be dropped; a roundup by 新智元, however, says GPT-6 Sol may come alongside Terra and Luna as a trio — the two accounts differ on whether Terra stays.
Per the 新智元 roundup, GPT-6 Sol is the mid-tier model, faster with lower token consumption; leaked pricing is $2.50/$15 (input/output), half of GPT-5.6 Sol, with a rumored Tuesday release; NVIDIA foundry details were also mentioned in the leak (not elaborated in the source material).
The leak relayed by danielmac8 says Anthropic is also working on version upgrades involving Fable, Opus, and Sonnet 5.5, with Opus 5.5 launching at a discount — read as a move to undercut OpenAI.

Why it matters

If the price-cut leak holds, GPT-6 Sol would significantly lower the unit cost of high-end models and could trigger a new price war; simultaneous upgrade rumors around Anthropic and OpenAI suggest frontier-model competition is entering a dense iteration cycle. Note that all information comes from anonymous accounts with questionable reliability, so readers should treat it with caution.

2026-09-21 ~ 2026-09-22 · 5 related posts

Primary sources

GPT-6-Luna and GPT-6-Sol rumored imminent, names possibly leaked via Azure — scaling01 · 2026-09-22 07:44 (UTC+08:00)
Azure "oopsie" reportedly leaks GPT-6-Luna and GPT-6-Sol names — scaling01 · 2026-09-22 07:46 (UTC+08:00)
GPT-6 Sol rumored to launch Tuesday at half price as Anthropic readies Opus 5.5 counterpunch — 新智元 · 2026-09-22 06:40 (UTC+08:00)

Scoop: OpenAI preps GPT-6 Sol and Luna launch as Anthropic nears Opus 5.5 — daniel_mac8 · 2026-09-21
[source] GPT-6 Sol rumored to launch Tuesday at half price as Anthropic readies Opus 5.5 counterpunch — 新智元 · 2026-09-22
[source] GPT-6-Luna and GPT-6-Sol rumored imminent, names possibly leaked via Azure — scaling01 · 2026-09-22
[source] Azure "oopsie" reportedly leaks GPT-6-Luna and GPT-6-Sol names — scaling01 · 2026-09-22

1 near-duplicate retellings: scaling01