
Latest features ChatGPT guide in 2026
A practical handbook for starting with ChatGPT
What it does
ChatGPT has become more than a simple chat box. This video gives beginners a practical 2026 guide to the features that matter most: app layout, Voice and Vision, models, Projects, image and data tools, prompting, GPTs, Codex, and pricing. The goal is to help viewers understand what to use first, what to ignore, and how to set up ChatGPT as a simple AI workspace for real work.
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Hey HN, Henry from Cactus here! We previously released Cactus Needle, a 14MB agentic LLM for tool call, device use, and structured extraction for phones, wearables, smart homes, small robots and microcontrollers. We got really great feedback here, and have now incorporated the suggestions to release Needle 2. The whole model is a single 14MB binary that runs a full session in 28MB of RAM; 45m parameters at 2bit compression. Needle hits 500 tokens/sec decode speed on a Raspberry Pi 5, sits between 400-1,500 tokens/sec on VR devices like Meta Quest 3S and Apple Vision Pro, and ranges…
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