OpenAI's Next-Gen Model Astra Reportedly Trained on Over 100K GPUs

OpenAI's next-generation model, internally codenamed Astra, has reportedly completed training at the Stargate site in Abilene, Texas, using over 100,000 GPUs across roughly two months of pretraining — a run Emad Mostaque reshared claims will be the first billion-dollar training run. Blogger imjustnewatai says Sam Altman confirmed the training is done and that Astra is OpenAI's first model significantly supervised by a previous-generation model during training. None of this is officially confirmed.

Confirmed

• The Information reports OpenAI considered naming Astra 'GPT-6' but dropped the idea (m3, m10); m6 adds the name may narrow to 'GPT-5.7 Astra' or 'GPT-Astra', saving the true generational leap for a later codename Bel
• Multiple posts (m2, m7, m9) agree on the scale: 100K+ GPUs, OpenAI's largest training run to date
• Internal tester Lentils80 (relayed by @OkDisplay3159, m1) disclosed two checkpoints: ultima-alpha, a likely public release candidate, and vega-alpha, a cybersecurity-focused enterprise version

Unconfirmed

• op7418 claims Astra is already deployed but not yet open, will offer 100% capacity to all paying users including Plus, with rollover reset credits — unverified
• Long-horizon task demos (8-day runs, 1,600 sub-agents, a Xiaomi 17 Ultra case) come from secondhand accounts
• haider1's claims of 10 research-level math/CS advances and OpenAI internal research-intern benchmark parity are opinion plus rumor; the $1B cost figure lacks an official source

Why it matters

• If the 100K-GPU, $1B scale holds, Astra marks a new order of magnitude in training cost and validates Stargate's role
• The old-model-supervises-training paradigm, if confirmed, would be a new scaling approach
• Dropping the GPT-6 name shows naming itself has become part of OpenAI's expectation management
• maksymandr's PostTrainBench Lite results look impressive but await independent verification

2026-09-02 ~ 2026-09-04 · 10 related posts

Full story(5 episodes)→

• Episode 1: OpenAI's future model 'Bel' reportedly finishes pretraining in August(2026-08-28, 2 posts)
• Episode 2: OpenAI's Next-Gen Model Astra Reportedly Trained on Over 100K GPUs(2026-09-02, 10 posts)
• Episode 3: OpenAI Researcher Says GPT-6 Astra Will Be Obsolete in Weeks(2026-09-04, 4 posts)
• Episode 4: OpenAI reveals internal model behind Navier-Stokes breakthrough is significantly stronger than GPT-6 Astra(2026-09-09, 12 posts)
• Episode 5: Report: OpenAI Training New Model That Beats Its Own GPT-6 Astra(2026-09-09, 4 posts)

• OpenAI reportedly passed on the GPT-6 name for Astra, saving the 6-worthy jump for Bel — Angaisb_ · 2026-09-02
• Astra hailed as a watershed model, reportedly passing OpenAI's internal AI-research intern benchmark — haider1 · 2026-09-03
• Insider leak: OpenAI's Astra tested as 'ultima-alpha' and 'vega-alpha' checkpoints — Ok_Display_3159 · 2026-09-03
• [source] OpenAI considered naming Astra 'GPT-6' but passed, The Information reports — rohanpaul_ai · 2026-09-04
• GPT-6 Astra scores impressively on PostTrainBench Lite benchmark — maksym_andr · 2026-09-04
• Leak claims GPT-6 Astra trained on 100,000+ GPUs at OpenAI's Stargate site — BLUECOW009 · 2026-09-04
• [source] Astra reportedly trained on 100k GPUs at Stargate Texas in first $1B training run — ai · 2026-09-04
• Leaked GPT-6 Astra demo shows 8-day task runs, 1600 sub-agents, and 3D modeling — op7418 · 2026-09-04
• [source] OpenAI "gpt-next" Leak: Astra Trained on 100k GPUs With Old Models Supervising — imjustnewatai · 2026-09-04

1 near-duplicate retellings: rohanpaul_ai