GPT-5.6 is officially open to the public, and OpenAI’s product strategy is shifting from 'chatbox' to 'workflow.' This update focuses on a thorough integration across three key dimensions: 1. Clear model tiering: GPT-5.6 introduces different levels like Sol and Terra. The flagship Sol is specifically optimized for complex reasoning and long-term autonomous tasks. It’s no longer just about answering questions—it now has the ability to handle extended logical chains. 2. Desktop-based interaction: ChatGPT and Codex have merged, enabling seamless integration of code and conversation through a brand-new desktop application. This completely eliminates the efficiency loss caused by frequent switching between IDEs and browsers. 3. Agent-based functionality: The new ChatGPT Work feature marks a shift from AI being a simple 'chat assistant' to becoming an actionable 'Agent.' It no longer just provides suggestions but can directly intervene in specific workflows and complete tasks. OpenAI is redefining the usage standards for next-gen AI through this product overhaul.