Researcher
Johannes Heidecke
Current role not listed
Career & education
OpenAI
Polarr
Polytechnic University of CataloniaWork and education history is primarily focused on AI-relevant roles and may not be comprehensive.
Citation Trend
Selected contributions
GPT-4 Technical Report
With OpenAI, Joshua Achiam, Steven Adler, Sandhini Agarwal, Lama Ahmad, Ilge Akkaya, Florencia Leoni Aleman and others ·Reported GPT-4's capabilities, limitations and safety evaluations as a text-and-image input model.
References
- GPT-4 contribution creditsopenai.com
Official credits identify Heidecke as Refusals & model safety co-lead.
- Rule Based Rewards for Language Model Safetyarxiv.org
Original coauthored paper converts explicit rules and model grading into reinforcement-learning rewards.
- Introducing Deep Research — product and contribution creditsopenai.com
Official product announcement explains multi-step web research and source citations; Heidecke appears in leadership credits, not the core research author list.
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Reviewed August 18, 2026 · Checked for accuracy and new information.