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OpenAI plans to remove its GPT-4 language model from ChatGPT on April 30, according to a recent changelog announcement. The company will replace it entirely with GPT-4o, which OpenAI says performs better than the original model across writing, programming, and STEM tasks. While GPT-4 will disappear from ChatGPT, developers can still access it through OpenAI's API. The 2023 model, which CEO Sam Altman indicated cost over $100 million to develop, remains at the center of several ongoing copyright disputes, including a lawsuit from the New York Times.

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OpenAI has introduced a new initiative called the "Pioneers Program" aimed at developing AI benchmarks tailored to specific industries. The company says the goal is to create evaluation methods that better reflect real-world use cases in areas such as law, finance, and healthcare—domains where existing benchmarks fall short. According to OpenAI, current AI benchmarks are often flawed. They tend to measure tasks that are difficult to interpret or overly susceptible to manipulation—criticisms that have also been directed at OpenAI itself. As reported previously, the company has faced scrutiny over its involvement in funding and promoting a prominent math evaluation dataset. In the coming months, OpenAI plans to collaborate with multiple companies to build domain-specific evaluation tools. These benchmarks will eventually be released publicly. The first cohort includes select startups focused on practical AI applications. Participating companies will also have the opportunity to work with OpenAI on improving model performance via reinforcement fine-tuning, a method the company recently introduced for customizing expert-level language models.

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Amazon has introduced Nova Sonic, a new AI voice model designed to process speech natively and generate natural-sounding responses. The model reportedly matches the performance of leading speech models from OpenAI and Google in key metrics like speed, speech recognition, and call quality. The company has made Nova Sonic available through its Bedrock developer platform at what it claims is an 80% lower cost compared to OpenAI's GPT-4o, though OpenAI does offer a more affordable option with GPT-4o-Mini. Some components of Nova Sonic are already integrated into Amazon's Alexa+ service. According to Rohit Prasad, SVP and Chief Scientist for AGI at Amazon, the model stands out for its ability to handle speech recognition in challenging conditions and efficiently route user requests to various APIs.

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