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.
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Introducing GPT-4o and More Tools to ChatGPT Free Users
OpenAI is launching GPT-4o, its newest flagship model, and expanding access to additional capabilities for free-tier ChatGPT users. This represents a significant democratization move, bringing frontier model capabilities to users without a paid subscription. The announcement signals OpenAI's strategy to broaden its user base while maintaining competitive pressure on rivals.
OpenAI Spring Update: GPT-4o Announced, Expanded Free ChatGPT Capabilities
OpenAI announced GPT-4o, a new flagship model, alongside an expansion of capabilities available to free-tier ChatGPT users. GPT-4o represents a new omnimodal architecture capable of handling text, audio, and vision in a unified model. The announcement was made via a live demo event and marks a significant shift in OpenAI's product and model strategy.
GPT-4 API General Availability and Completions API Deprecation Plan
OpenAI has announced general availability of the GPT-4 API, alongside GPT-3.5 Turbo, DALL·E, and Whisper APIs. Concurrently, OpenAI is releasing a deprecation plan for older models in the Completions API, which are set to retire at the beginning of 2024. This marks a significant milestone in OpenAI's API product lifecycle, transitioning GPT-4 from limited access to broad developer availability.
New in ChatGPT for Business: April 2025 Updates
OpenAI published an April 2025 update for ChatGPT's business tier, highlighting four capability areas: the o3 reasoning model, image generation, enhanced memory, and internal knowledge retrieval. The announcement is framed around hands-on demos for enterprise users. This represents an incremental rollout of recently released capabilities into the business product line rather than a new model launch.
GPT-5.1: A smarter, more conversational ChatGPT
OpenAI is rolling out GPT-5.1, an upgrade to the GPT-5 series, beginning with paid users on November 12, 2025. The update emphasizes warmer conversational tone, improved capabilities, and new options for customizing ChatGPT's tone and style. No specific benchmark results or architectural details are provided in the announcement.
GPT-4o mini: advancing cost-efficient intelligence
OpenAI announced GPT-4o mini, a smaller and more cost-efficient version of GPT-4o, targeting applications that require lower latency and reduced inference costs. The model is positioned to outperform competing small models on key benchmarks while maintaining multimodal capabilities. It replaces GPT-3.5 Turbo as OpenAI's recommended entry-level model for cost-sensitive deployments.
OpenAI deploys GPT-5.5 Instant to improve ChatGPT health and wellness responses
OpenAI has updated ChatGPT's health and wellness capabilities using GPT-5.5 Instant, citing improvements in reasoning, contextual understanding, and communication clarity. The update was informed by physician evaluations, suggesting a structured clinical validation process. This represents both a model deployment signal and a domain-specific capability push into health intelligence.
Introducing ChatGPT Go, now available worldwide
OpenAI has launched ChatGPT Go as a new globally available subscription tier, providing access to GPT-5.2 Instant with higher usage limits and extended memory capabilities. The offering is positioned as a more affordable entry point to advanced AI features for users worldwide. This represents a new pricing and access tier in OpenAI's consumer product lineup.