Below is a comprehensive timeline of all significant versions and models released by OpenAI for ChatGPT, including key milestones and feature introductions.
Summary Table: Major ChatGPT Model Releases
| Release Date | Model/Version | Key Advancement/Change |
|---|---|---|
| Nov 30, 2022 | ChatGPT (GPT-3.5) | First public release, conversational AI |
| Feb 1, 2023 | ChatGPT Plus | Subscription plan, faster access |
| Mar 14, 2023 | GPT-4 | Multimodal, advanced reasoning, larger context |
| Dec 17, 2024 | o1 | Enhanced reasoning, self-verification |
| Jan 31, 2025 | o3-mini | Efficient, smaller model |
| Apr 10, 2025 | GPT-4o | Natively multimodal, replaces GPT-4 in ChatGPT |
| Apr 16, 2025 | o3, o4-mini | Latest o-series models, improved thoughtful responses |
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