AI·OpenAI integrates Codex capabilities into its new ChatGPT Work agent for general office tasks, rebrands models as Sol/Terra/Luna tiers, and makes GPT-5.6 the default for Microsoft 365 Copilot.
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AI·OpenAI released GPT-5.6 in three tiers—Sol (flagship), Terra, and Luna—boosting benchmarks in Agent's Last Exam (56.3 score), math, coding, security, and research while slashing token costs and adding Max/Ultra reasoning modes.
AI·OpenAI's GPT-5.6 limited preview, reportedly requiring White House approval, was abruptly released without permission after 10 days, with the government clarifying no approval is needed and labeling the cooperation 'voluntary'.
AI·OpenAI attributes a complete proof of the 50-year-old Cycle Double Cover Conjecture (every bridgeless graph has a cycle double cover) to GPT-5.6 Sol Ultra, which completed the 3-page PDF in under an hour using 64 parallel sub-agents guided by a 700-character public prompt.
AI·After GPT-5.6 is released, Claude finally resets its Fable 5 token limit.
AI·GPT-5.6 becomes the preferred model in Microsoft 365 Copilot, delivering stronger AI capabilities for Word, Excel, PowerPoint, Chat, and Cowork productivity tools.
AI·GPT-5.6 family (Sol, Terra, Luna) launches with frontier intelligence, offering more useful work per token, stronger performance per dollar, and on-demand ultra reasoning for complex tasks.
AI·ChatGPT Work is now an agent that takes action across apps and files, stays with projects for hours, and turns goals into finished work using GPT-5.6.
OpenAI previews GPT-5.6 Sol, a next-generation model with stronger capabilities in coding, science, and cybersecurity, paired with its most advanced safety stack.