OpenAI made significant advancements in 2025, introducing a range of new models, APIs, and tools like Codex, which have enhanced the capabilities for developers. Key developments include the convergence of reasoning models from o1 to o3/o4-mini and GPT-5.2, the introduction of Codex as a coding interface, and the realization of true multimodality with audio, images, video, and PDFs. Additionally, OpenAI launched agent-native building blocks such as the Responses API and Agents SDK, and made strides in open weight models with gpt-oss and gpt-oss-safeguard. The capabilities curve saw remarkable improvements, with GPQA accuracy jumping from 56.1% to 92.4% and AIME reaching 100% accuracy, reflecting rapid progress in AI's ability to perform complex tasks. This matters because these advancements empower developers with more powerful tools and models, enabling them to build more sophisticated and versatile applications.
A new tool has been developed to enhance the models.dev catalog, allowing users to search, compare, and rank models efficiently while also identifying open-weight alternatives with detailed scoring explanations. This tool features fast search capabilities with on-demand catalog fetching, ensuring minimal data is sent to the client. It also provides token cost estimates and shareable specification cards, all under an open-source MIT license, encouraging community contributions for improvements. This matters because it facilitates more informed decision-making in model selection and fosters collaboration in the open-source community.