OpenAI denies Codex prompts influenced training as "stolen chat data" claims unravel

OpenAI formally denied claims that user Codex prompts influenced its models, and the core allegation is widely considered unsupported. After OpenAI announced progress on Navier-Stokes and other Millennium Prize problems, X users accused it of stealing private chat data to fabricate the NS "evidence." OpenAI denied this via a statement relayed by NYT reporter Kenneth Chang, and researchers publicly pushed back against the conspiracy theory.

Confirmed

• Per NYT's Kenneth Chang, an OpenAI spokesperson stated that prompts Dr. Buckmaster entered into Codex over the past two months could not have affected the system in any way, including model training.
• QuintinPope5 relayed that OpenAI's investigation confirmed no user input after July 3 could have affected the system.
• Researcher tszzl recalled joining a call after OpenAI's first announcement where participants tried to craft "lawyerly precise wording" before confirming whether Codex opt-in data entered training; it is now clear that possibility is zero.
• QuintinPope5 called the unsupported claim that OpenAI stole users' private chats "irresponsibly absurd," and tszzl agreed.

Unconfirmed

• The original allegation that OpenAI stole private chat data to fabricate proof has no public evidence and remains a rumor circulating on X.

Why it matters

• The episode touches the trust baseline around whether AI companies use private interaction data for training; OpenAI's shift from "uncertain" to a categorical denial is itself newsworthy.
• The research community's wariness of conspiratorial spread is notable: if OpenAI had accessed personal Codex usage traces it would be serious; if not, its handling appears professional.

2026-09-11 ~ 2026-09-11 · 8 related posts

Full story(20 episodes)→

• Episode 1: Rumors claim GPT-6 cracks Navier-Stokes, credibility doubtful(2026-09-05, 2 posts)
• Episode 2: OpenAI Claims 10,000 Agents Solved Navier-Stokes in 88 Hours(2026-09-09, 13 posts)
• Episode 3: Existence Proof Effect: Rumor of Solvability Drove OpenAI's Navier-Stokes Attempt(2026-09-09, 3 posts)
• Episode 4: Mathematicians Accuse OpenAI of Racing to Claim Their Unfinished Proof(2026-09-09, 6 posts)
• Episode 5: Anthropic Faces Ethics Backlash Over Math Proof and Scooped Collaboration(2026-09-09, 2 posts)
• Episode 6: Rumors swirl that OpenAI nears Hodge and BSD conjectures as Millennium Prize problems fall(2026-09-10, 27 posts)
• Episode 7: OpenAI Claims Navier-Stokes Solved, Progress on a Second Millennium Problem(2026-09-10, 21 posts)
• Episode 8: Mathematician accuses OpenAI of training Astra on his unpublished work; OpenAI denies(2026-09-10, 9 posts)
• Episode 9: Navier–Stokes Authorship Dispute Fuels Debate Over AI Labs' Scooping Culture(2026-09-10, 6 posts)
• Episode 10: OpenAI denies Codex prompts influenced training as "stolen chat data" claims unravel(2026-09-11, 8 posts)
• Episode 11: OpenAI's Millennium Prize Claim Mired in Authorship and Scooping Dispute(2026-09-11, 10 posts)
• Episode 12: AI Circles Speculate Millennium Prize Problems May Fall to AI(2026-09-11, 2 posts)
• Episode 13: Math Community Splits Over AI's Role After OpenAI's Millennium Prize Claim(2026-09-11, 8 posts)
• Episode 14: Rumor: OpenAI Aims Internal Model at Riemann Hypothesis and P vs NP(2026-09-11, 7 posts)
• Episode 15: OpenAI's Navier-Stokes Proof Passes Rechecks but Faces Scrutiny(2026-09-11, 2 posts)
• Episode 16: OpenAI's 10,000-Agent Navier-Stokes Claim Sparks Math Community Credit War(2026-09-12, 18 posts)
• Episode 17: Misread as Anti-AI, Terence Tao Sparks Debate Over the Value of Mathematics(2026-09-12, 18 posts)
• Episode 18: Fields Medalists' Open Letter on AI Sparks Cross-Disciplinary Debate(2026-09-12, 6 posts)
• Episode 19: OpenAI Claims AI Agent Solved the Navier–Stokes Blow-up Problem(2026-09-13, 8 posts)
• Episode 20: OpenAI Claims 10,000 Agents Solved Navier-Stokes Problem in 88 Hours(2026-09-14, 11 posts)

• OpenAI: Codex prompts 'categorically impossible' to have influenced the system or training — charliermarsh · 2026-09-11
• [source] OpenAI denies Codex prompts touched training after baseless chat-data theft claims — QuintinPope5 · 2026-09-11
• Insider: chances are zero that opt-in Codex data made it into OpenAI training runs — soumitrashukla9 · 2026-09-11
• OpenAI denies accessing personal Codex traces amid Navier-Stokes rumor — soumitrashukla9 · 2026-09-11
• [source] Claim that OpenAI stole private chat data for an 'NS proof' called baseless — tszzl · 2026-09-11
• OpenAI denies Codex prompts influenced Navier-Stokes system as drama spirals on X — basedjensen · 2026-09-11
• Researchers clash over baseless claim that OpenAI stole private chat data for NS proof — basedjensen · 2026-09-11

1 near-duplicate retellings: AdrienLE