OpenAI is retiring GPT-4o and three other legacy models tomorrow, likely for good

2026-02-12 · Source: The Decoder · Field: Technology & Digital — Artificial Intelligence & Machine Learning · Depth: Fundamental Awareness, quick

Summary

OpenAI is discontinuing several legacy AI models from ChatGPT on February 13, 2026, including GPT-4o, GPT-4.1, GPT-4.1 mini, and o4-mini. While these models will remain accessible via the API, their removal from ChatGPT is attributed to low usage, with GPT-4o, for instance, being selected by only 0.1 percent of users daily. This decision follows a previous attempt to retire GPT-4o in August 2025, which was reversed due to significant user backlash from those who valued its "people-pleasing communication style." OpenAI acknowledges the potential frustration for users but states that retiring older models enables a focus on improving more widely used current models like GPT-5.1 and GPT-5.2, which now offer customizable tone and style settings.

Key takeaway

For CTOs and VPs of Engineering evaluating AI model adoption, this move highlights the importance of user engagement metrics in model lifecycle management. While legacy models may retain niche appeal, focusing resources on widely adopted, improved successors like GPT-5.1 and GPT-5.2 is critical for optimizing development and support. Ensure your teams are transitioning to newer models and leveraging their enhanced features, such as customizable tone, to meet evolving user needs.

Key insights

Low user engagement drives OpenAI's decision to retire legacy models from ChatGPT, despite past user attachment.

Principles

• User adoption dictates model lifecycle.
• Model updates can be significant social events.

In practice

• Utilize GPT-5.1 or GPT-5.2 for improved performance.
• Explore ChatGPT's tone and style controls for personalization.

Topics

• OpenAI Model Retirement
• GPT-4o
• AI Model Lifecycle
• User Feedback
• ChatGPT Personalization

Best for: CTO, VP of Engineering/Data, Director of AI/ML, Tech Journalist, AI Product Manager, General Interest

Related on AIssential

• OpenAI Is Nuking Its 4o Model. China’s ChatGPT Fans Aren’t OK — Users form deep emotional bonds with AI models, making model discontinuation highly disruptive.
• I migrated my whole 4o setup months ago. — Prioritize portable context over specific AI models to future-proof personalized AI setups.
• GPT 5.6 is HERE! but you can't use it! — Government restrictions are delaying broad access to OpenAI's new, highly performant, and cost-effective GPT 5.6 model family.
• OpenAI gives GPT-5.5 Instant a readability upgrade while phasing out two older models — OpenAI is refining ChatGPT's user experience by enhancing GPT-5.5 Instant's output and streamlining features while retiring older models.
• for those who don't want to let go of GPT-4o — A custom prompt can channel a retired AI model's personality into newer, more powerful models.
• We Tried The New GPT-5.4 And it is The Most Powerful ChatGPT Has Ever Been — OpenAI's GPT-5.4 update introduces specialized versions for enhanced performance on complex tasks.

Open in AIssential →

Editorial summary, takeaway, and curation by AIssential. Original article published by The Decoder.