Core Insights - ChatGPT has reintroduced its singing capabilities, allowing it to perform songs like "Last Christmas" with recognizable melody and lyrics, although rhythmically it still has room for improvement [1][2][17] - The singing feature of ChatGPT is not as advanced as dedicated AI music generation tools, as it relies on general AI models rather than specialized audio generation technology [5][9] - OpenAI has implemented strict copyright measures that limit ChatGPT's ability to sing full songs, leading to a cautious approach where it may only perform snippets or altered versions of songs [14][17][22] Group 1 - ChatGPT can now sing recognizable songs, including classic Christmas tunes, but its performance lacks the rhythm and fluidity of professional singers [1][2][17] - The singing capability is part of the advanced voice mode (AVM) that was rolled out to Plus and Team users, allowing for a more interactive experience [11][16] - OpenAI's GPT-4o model has shown significant improvements in audio processing, with response times comparable to human reactions, enhancing its singing and interaction capabilities [10][18] Group 2 - ChatGPT's singing relies on additional technologies like Text-to-Speech (TTS) for clear pronunciation and AudioGPT for advanced audio processing, differentiating it from specialized music AI tools [5][9][7] - The AI's singing is limited by copyright concerns, leading to a strategy of performing only short segments of songs or using altered renditions to avoid legal issues [14][17][22] - OpenAI has been cautious about the implications of AI-generated music, emphasizing the need for copyright respect and the potential legal risks associated with AI music generation [22][24][26]