All the AI news of the week: ChatGPT debuts o3 and o4-mini, Gemini talks to dolphins

Just like AI models, AI news never sleeps. Every week, we're inundated with new models, products, industry rumors, legal and ethical crises, and viral trends. If that weren't enough, the rival AI hype/doom chatter online makes it hard to keep track of what's really important. But we've sifted through it all to round up the most notable AI news of the week from the heavyweights like OpenAI and Google, as well as the AI ecosystem at large. As of this writing, the popular AI leaderboard LMArena ranks Gemini 2.5 Pro as the model to beat, followed by ChatGPT 4o, and Grok-3 Preview.