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Miles Brundage left OpenAI on October 23, 2024, after serving as its Senior Advisor for AGI Readiness. In his departure announcement, he wrote that neither OpenAI nor other frontier AI labs were ready to safely, securely, and beneficially develop, deploy, and govern increasingly capable AI—and that the world was not ready either.
That was a warning about institutional preparedness, not an announcement that OpenAI had achieved artificial general intelligence (AGI), that AGI was imminent, or that a single undisclosed incident forced him to resign.
Who Miles Brundage was at OpenAI
Brundage worked at OpenAI from 2018 through 2024. His roles included research scientist on the Policy team, Head of Policy Research, and Senior Advisor for AGI Readiness. Calling him an “AGI czar” is journalistic shorthand; it was not his formal title and does not necessarily imply that he ran OpenAI’s AGI program.
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What “AGI readiness” meant
Brundage used “AGI readiness” in a broad, practical sense. It was not simply a job focused on preventing one future machine from going out of control, nor was it a benchmark for deciding whether a model had crossed a binary AGI threshold.
He described two connected questions:
- OpenAI’s readiness: whether the company could responsibly steward increasingly powerful AI capabilities.
- The world’s readiness: whether governments, institutions, and society could manage those capabilities through regulation, security practices, deployment safeguards, and other forms of coordination.
That broader readiness problem can include technical alignment and control, protection of model weights, internal governance, economic and labor-market preparation, government regulation, international coordination, and public understanding. Brundage also cautioned that “AGI” is an overloaded term that can encourage an overly simplistic distinction between “AGI” and “not AGI.”
His central concern was therefore not only whether a lab was ready at a particular moment. It was whether labs and governments could close their readiness gaps before advances in capability made those gaps dangerous. Brundage explained his view in his departure essay, “Why I’m Leaving OpenAI and What I’m Doing Next.”
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The most important line in his statement was that “neither OpenAI nor any other frontier lab is ready, and the world is also not ready.”
That statement is easy to overread. Brundage immediately distinguished being unready from being unable to become ready in time. His argument was that current preparedness was inadequate, while the outcome would depend on whether technical, organizational, regulatory, and societal systems improved before increasingly capable systems arrived.
He did not provide a firm date for AGI. He did not say that OpenAI had already achieved AGI. He did not predict that AGI would arrive “tomorrow,” and he did not argue in the cited statement that all AI development should stop.
The warning was institutional rather than predictive: capability progress could move faster than the systems needed to control, secure, govern, and responsibly deploy that progress.
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Why Brundage said he was leaving
Brundage presented his resignation primarily as a move toward independent AI-policy research and advocacy, not as a dramatic protest or whistleblower disclosure. He gave several related reasons.
He wanted greater external impact
Brundage said he believed he could influence AI development more effectively from outside the industry. Working inside a frontier lab offers direct access to decision-makers and operational knowledge. Working outside can make it easier to address the broader policy environment and engage with institutions that are not part of one company.
He wanted more independence
He said that leaving would reduce potential institutional bias and the perception that his policy positions were shaped by OpenAI’s commercial interests. That distinction mattered because his work concerned rules and safeguards that could affect OpenAI as well as its competitors.
He faced opportunity costs and publication constraints
Remaining at OpenAI limited the time he could devote to other research topics. He also said the company’s high profile and internal review requirements made it harder to publish on some issues. An external role could provide more freedom to investigate and discuss policy questions publicly.
He had already raised his concerns internally
Brundage said he had advised OpenAI executives and its board about the company’s readiness gaps. He viewed that internal work as an important part of his contribution and believed he could now be more useful outside the company.
He planned to start or join a nonprofit focused on AI-policy research and advocacy. He also expressed gratitude toward OpenAI colleagues and said that working at the company remained one of the most impactful options for many people. That measured account does not support describing the resignation as a rejection of every OpenAI project or employee.
What happened to OpenAI’s AGI Readiness team
Brundage’s departure coincided with a reorganization of the AGI Readiness function. He said the Economic Research team would move under Ronnie Chatterji, OpenAI’s new chief economist. Other work would be distributed among different groups, including projects moving to Josh Achiam’s Mission Alignment team.
OpenAI later acknowledged Brundage’s October 23, 2024 resignation in an April 2025 court filing. The company described the redistribution of the team’s membership and responsibilities as an effort to create a more streamlined structure, tighter feedback loops, and stronger alignment with its mission.
That reorganization is not self-interpreting. Redistributing a dedicated team can mean closer integration with operational groups, consolidation, reduced priority, or some combination. The available evidence confirms the redistribution and OpenAI’s explanation for it; it does not by itself prove that OpenAI abandoned safety work or that the reorganization weakened it.
Why the departure attracted attention
The story combined three developments:
- A senior policy and readiness adviser left a company whose mission is centered on ensuring that AGI benefits humanity.
- The internal AGI Readiness team was reorganized and its responsibilities distributed across other teams.
- The departing adviser publicly said that frontier labs and the wider world were not ready for increasingly capable AI.
Together, those facts created a powerful symbol of the tension between accelerating AI development and preparing institutions to manage its consequences. But the symbolism should not be confused with proof of a hidden crisis.
Contemporary coverage, including The Register’s report, helped frame the significance of the departure. Brundage’s own explanation remains the best source for distinguishing his stated reasons from outside speculation.
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What the evidence does—and does not—show
| Supported by the cited evidence | Not established by the cited evidence |
|---|---|
| Brundage believed OpenAI, other frontier labs, and the world were not yet ready. | That OpenAI had already achieved AGI. |
| He wanted greater independence and freedom to pursue outside policy work. | That one specific safety incident forced his resignation. |
| The AGI Readiness team’s responsibilities were redistributed. | That OpenAI had abandoned safety or governance work. |
| He had raised readiness concerns with executives and the board. | That he accused leadership of secretly knowing AGI was imminent. |
| He planned to continue working on AI policy and advocacy. | That he called for all AI development to stop. |
The larger readiness problem
“Ready for AGI” can mean different things depending on the risk under discussion. A company may need technical methods for alignment and control, strong cybersecurity, secure model-weight handling, deployment safeguards, and clear internal decision-making. Governments may need effective regulation, institutional expertise, international coordination, and plans for economic disruption. The public may need reliable information and resilient institutions.
These forms of readiness do not automatically advance at the same speed as model capability. A lab can improve a system’s performance while policy, security, governance, and public institutions lag behind. That gap—not a specific AGI arrival date—was the core of Brundage’s warning.
There is also a genuine trade-off between internal and external influence. An employee can access real deployment processes and communicate directly with company leadership, but may face confidentiality obligations, review procedures, and concerns about institutional bias. An independent researcher may have more publication freedom and perceived neutrality, but less access to internal systems and decision-making.
The precise way to describe the resignation
The most accurate summary is that OpenAI’s former Senior Advisor for AGI Readiness left on October 23, 2024, to pursue more independent AI-policy work. He warned that frontier labs and the world were not yet ready to safely and beneficially manage increasingly capable AI. His departure occurred alongside the redistribution of the AGI Readiness team.
It is not accurate to turn that into “OpenAI’s AGI chief quit because the company is recklessly building AGI.” The evidence supports concern about preparedness and institutional independence, but not a claim that AGI had already been built, that it was imminent, or that Brundage exposed a secret internal incident.
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