Agent Post-Training, Context Research

Job Overview

We are seeking an Agent Post-Training, Context Researcher to join our team at OpenAI. You will play a crucial role in scaling compute spent on context, working on the frontier training stack, and enabling the next paradigm of model training. This is a high-agency role for individuals who want their work to directly impact frontier models.

Responsibilities

• Design and run experiments to improve the scaling of compute on context.
• Own end-to-end improvements to the post-training stack, including reinforcement learning, data pipelines, graders, reward signals, evaluations, diagnostics, and model-behavior analysis.
• Develop evaluations and environments that expose the next set of model failures and turn those failures into training data, product fixes, or new research directions.
• Collaborate with Codex and ChatGPT product teams to understand user needs and translate product signal into model improvements.
• Work on early-training and alignment interventions, including data mixtures, objectives, synthetic data, and evaluation loops that shape downstream agent behavior.
• Help decide which integrations, capabilities, and fixes are ready for inclusion in major model runs.
• Improve the machinery for large-scale training and launch, focusing on experiment velocity, reliability, observability, reproducibility, cost, latency, and production readiness.
• Take on cross-functional projects that touch model training, product infrastructure, and the production agent harness.

Requirements

• Strong technical fundamentals in machine learning, software engineering, systems, statistics, or a related field.
• Hands-on experience with large language models, reinforcement learning, post-training, evaluations, graders, synthetic data, model training, coding agents, tool-using agents, or production machine learning systems.
• Experience working across research, product, infrastructure, data, evaluations, and safety boundaries.

Benefits

• Estimated base salary: $295K - $445K
• Generous equity and performance-related bonuses
• Medical, dental, and vision insurance for you and your family
• Pre-tax accounts for Health FSA, Dependent Care FSA, and commuter expenses
• 401(k) retirement plan with employer match
• Paid parental leave, medical and caregiver leave
• Flexible PTO and paid company holidays
• Mental health and wellness support
• Employer-paid basic life and disability coverage
• Annual learning and development stipend
• Daily meals in our offices and meal delivery credits
• Relocation support for eligible employees

About OpenAI

OpenAI is committed to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of AI capabilities and seek to safely deploy them through our products.