"GPT-6 Sol" Apparently Surfaces in OpenAI API and OpenRouter
Starting September 11, Reddit users and bloggers reported an unreleased "GPT-6 Sol" entry in the OpenAI API, some with screenshots; the next day haider1 spotted a suspected new model on OpenRouter, suggesting OpenAI's next-generation model may be in staged API testing. OpenAI has made no confirmation, so these remain credibility-pending leaks.
Confirmed
- Multiple users (relayed by @SteveEricJordan and @1411337 from Reddit) reported detecting a GPT-6 Sol entry in the OpenAI API, one with a screenshot.
- @haider1 said on September 12 that he saw a suspected new model on OpenRouter minutes earlier (with an image, unverified), echoing the API-side discovery.
- The finding matches OpenAI's habit of gradually rolling out new models (viewpoint relayed by @1411337).
Unconfirmed
- Whether the model exists and its capabilities are unconfirmed; OpenAI has not responded, and the OpenRouter sighting is unverified.
- A Reddit rundown relayed by @SteveEricJordan claims OpenAI's new product line is ordered by price and intelligence as astra > sol > terra > luna, mirroring Anthropic's four-tier lineup, with Sol targeting the $20 subscription tier — community speculation.
- @haider1 speculates the internal model "astra" is a base model that OpenAI will refine with RL/post-training, making GPT-6 Sol faster and cheaper, likely for Plus-tier users — personal analysis.
- @koltregaskes relayed the view that GPT-6 (codename Sol) may launch before or at DevDay — pure timing speculation.
Why it matters
- If true, GPT-6 would have left observable deployment traces on both the API and a third-party aggregation platform simultaneously, suggesting the launch window for OpenAI's next flagship may be near.
- If the rumored multi-tier lineup (astra/sol/terra/luna) holds, it would show OpenAI tiering models by price and capability, competing head-on with Anthropic's tiered product line.
2026-09-11 ~ 2026-09-12 · 6 related posts
Primary sources
- GPT-6 "Sol" reference spotted online, release rumored ahead of DevDay — koltregaskes · 2026-09-11
- [source] GPT-6 Sol Spotted on the OpenAI API, Screenshot Suggests Internal Testing — 141_1337 · 2026-09-11
- GPT 6 Sol spotted in OpenAI API, rumored 4-tier lineup mirroring Anthropic — SteveEricJordan · 2026-09-11
- GPT-6 Sol may be imminent: insider claims new 'astra' base model is ready for RL post-training — haider1 · 2026-09-11
- [source] Unverified model appears on OpenRouter, gpt-6 sol speculated to launch soon — haider1 · 2026-09-12
1 near-duplicate retellings: SteveEricJordan