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OpenAI Logo OpenAI · IT - Software Development

Researcher, Pretraining Safety

United States, San Francisco 295000.00 - 445000.00 USD / Year · Job Posted February 21, 2026
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Job Description

The Pretraining Safety team’s goal is to build safer, more capable base models and enable earlier, more reliable safety evaluation during training. We aim to: Develop upstream safety evaluations that to monitor how and when unsafe behaviors and goals emerge; Create safer priors through targeted pretraining and mid-training interventions that make downstream alignment more effective and efficient; Design safe-by-design architectures that allow for more controllability of model capabilities. In addition, we will conduct the foundational research necessary for understanding how behaviors emerge, generalize, and can be reliably measured throughout training.

Job Responsibility

  • Develop new techniques to predict, measure, and evaluate unsafe behavior in early-stage models
  • Design data curation strategies that improve pretraining priors and reduce downstream risk
  • Explore safe-by-design architectures and training configurations that improve controllability
  • Introduce novel safety-oriented loss functions, metrics, and evals into the pretraining stack
  • Work closely with cross-functional safety teams to unify pre- and post-training risk reduction

Requirements

  • Experience developing or scaling pretraining architectures (LLMs, diffusion models, multimodal models, etc.)
  • Comfortable working with training infrastructure, data pipelines, and evaluation frameworks (e.g., Python, PyTorch/JAX, Apache Beam)
  • Enjoy hands-on research — designing, implementing, and iterating on experiments
  • Enjoy collaborating with diverse technical and cross-functional partners (e.g., policy, legal, training)
  • Data-driven with strong statistical reasoning and rigor in experimental design
  • Value building clean, scalable research workflows and streamlining processes for yourself and others

What we offer

  • Medical, dental, and vision insurance for you and your family, with employer contributions to Health Savings Accounts
  • Pre-tax accounts for Health FSA, Dependent Care FSA, and commuter expenses (parking and transit)
  • 401(k) retirement plan with employer match
  • Paid parental leave (up to 24 weeks for birth parents and 20 weeks for non-birthing parents), plus paid medical and caregiver leave (up to 8 weeks)
  • Paid time off: flexible PTO for exempt employees and up to 15 days annually for non-exempt employees
  • 13+ paid company holidays, and multiple paid coordinated company office closures throughout the year for focus and recharge, plus paid sick or safe time (1 hour per 30 hours worked, or more, as required by applicable state or local law)
  • Mental health and wellness support
  • Employer-paid basic life and disability coverage
  • Annual learning and development stipend to fuel your professional growth
  • Daily meals in our offices, and meal delivery credits as eligible
  • Relocation support for eligible employees
  • Additional taxable fringe benefits, such as charitable donation matching and wellness stipends
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