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Here is the official Claude 4 announcement:
I walk through how I test Claude 4’s newest models, Claude Opus 4 and Claude Sonnet 4, using real-world tasks to see how they compare to other top AI models like ChatGPT and Gemini.
I try coding a custom chess game in Python, running long documents through its 1 million token context window, and building visual dashboards from data. I also show how well it does with logical reasoning, web search, and acting like a personal assistant. I even see if it can turn a screenshot into usable web code for a site banner. Claude’s new “extended thinking” and web tools really help make responses smarter.
Claude Opus 4 claims to be the best coding model out there now. It worked great with some prompts, but still had issues with complex logic. Claude Sonnet 4 is free to use and better than Sonnet 3.7, though uploading screenshots doesn’t work the same right now. I also tested it on a tricky train riddle and Airbnb research — it handled both well.
