OpenAI discontinues API access for popular GPT-4o model starting February 2026

Summary:

1. OpenAI is retiring its GPT-4o model from the developer platform in mid-February 2026, giving developers a three-month transition period.
2. GPT-4o was a groundbreaking multimodal model that gained widespread popularity, leading to user backlash when it was initially replaced with GPT-5.
3. Developers are encouraged to migrate to GPT-5.1, which offers advanced features and a more cost-effective pricing structure compared to GPT-4o.

   Article:
   OpenAI has recently announced the retirement of its chat GPT-4o-latest model from the developer platform, with access scheduled to end on February 16, 2026. This move has sparked a wave of reactions from users and developers who have grown attached to the model over the past 1.5 years since its release in May 2024. GPT-4o, also known as "Omni," was a significant milestone in OpenAI’s ecosystem, introducing a unified multimodal architecture that allowed it to process text, audio, and images through a single neural network. This innovation resulted in major improvements in various areas such as image understanding, multilingual support, and expressive voice interaction.

   The popularity of GPT-4o among millions of ChatGPT users led to a strong user backlash when OpenAI initially replaced it with the newer GPT-5 model in August 2025. Users expressed their attachment to GPT-4o’s conversational tone, emotional responsiveness, and consistency, which made it uniquely valuable for everyday tasks and personal support. Some users even developed emotional bonds with the model, using it as a romantic partner or confidant. This led to OpenAI reinstating GPT-4o as a default option for paying users and promising extended warning before any future removals.

   In light of the retirement of GPT-4o, developers are now encouraged to transition to GPT-5.1 for most new workloads. GPT-5.1 offers larger context windows, advanced reasoning modes, and higher throughput options compared to GPT-4o. While many developers have already begun evaluating GPT-5.1 as a replacement, applications reliant on latency-sensitive pipelines may require additional tuning and benchmarking.

   The retirement of GPT-4o also aligns with a major reshaping of OpenAI’s API model pricing structure. GPT-4o currently occupies a mid-to-high-cost tier, despite being an older model, when compared to the newer and more capable GPT-5.1. This strategic pricing shift aims to provide developers with access to more powerful models at lower or comparable costs, reducing the incentive to stay on older generations.

   Overall, the retirement of GPT-4o marks the end of an era for a model that played a significant role in normalizing real-time multimodal AI. While the transition may pose some challenges for developers, it reflects OpenAI’s commitment to innovation and the evolution of its product offerings to meet the changing needs of users and developers alike.