o4-mini
o4-mini-339f0414·4 events·first seen 28d agoAliases: o4-mini
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Introducing OpenAI o3 and o4-mini
OpenAI has released o3 and o4-mini, described as their smartest and most capable models to date. Both models ship with full tool access, representing a significant step in integrating reasoning models with agentic capabilities. The announcement comes from OpenAI's official blog, marking a major frontier model release.
CodeRabbit Integrates o3, o4-mini, and GPT-4.1 for AI-Powered Code Review
CodeRabbit, an AI code review platform, has adopted OpenAI's o3, o4-mini, and GPT-4.1 models to power its pull request review workflow. The integration aims to improve review accuracy, accelerate PR merge cycles, and reduce bugs. This represents a production deployment case study for OpenAI's latest reasoning and general-purpose models in a developer tooling context.
OpenAI Retiring GPT-4o, GPT-4.1, GPT-4.1 mini, and o4-mini from ChatGPT in February 2026
OpenAI announced that on February 13, 2026, it will retire GPT-4o, GPT-4.1, GPT-4.1 mini, and o4-mini from ChatGPT, alongside the previously announced retirement of GPT-5 variants (Instant, Thinking, and Pro). The retirements apply only to the ChatGPT product interface; API access to these models is unaffected at this time. This signals a consolidation of the ChatGPT model lineup, likely in favor of newer or more capable successors.
OpenAI Publishes System Card Addendum for Codex Agent and codex-1 Model
OpenAI released an addendum to the o3 and o4-mini system cards covering Codex, a cloud-based coding agent powered by codex-1—a variant of o3 fine-tuned for software engineering via reinforcement learning on real-world coding tasks. codex-1 is designed to produce code matching human style and PR conventions, follow instructions precisely, and iterate on tests until they pass. The addendum provides safety and capability documentation for this specialized agentic deployment.