OpenAI's flagship AI platform — had what Everyday AI's Jordan Wilson called 'the most consequential product week in years' (April 21-27, 2026): GPT-5.5 'Spud' launched with 60% fewer hallucinations, scored 84.9 on GDPval benchmark, and ties/outperforms expert humans 85% of the time. ChatGPT Images 2.0 launched simultaneously — production-grade typography, 2K resolution, multilingual text rendering, 8 coherent images per prompt, beat every other image model by 236 points in blind testing. ChatGPT Workspace Agents launched — persistent AI assistants that run complex multi-step workflows automatically, even offline. Caveat: GPT-5.5 is optimized primarily for agentic coding tasks — content marketers focused on writing quality may not notice dramatic improvements over previous versions.

Advanced AI assistant known for nuanced understanding, detailed analysis, and high-quality long-form content creation. Excels at complex research, strategic planning, and maintaining consistent brand voice. As of May 2026, Anthropic doubled rate limits across all paid plans and eliminated peak-hour throttling for Pro and Max — the result of a compute partnership with SpaceX's Colossus One facility. Also in research preview as of May 2026: Claude Managed Agents with a 'dreaming' capability — agents that autonomously review their own past sessions and curate better memory between projects, making repeat client work progressively more efficient.

AI-powered research and answer engine with sourced, cited answers — and now the first viable AIO (AI Optimization) advertising channel. Sponsored Questions launched January 4, 2026 for US users: brands like Whole Foods and Indeed pay to insert Sponsored Follow-Up Questions into AI answers. When someone asks about project management tools, a sponsored follow-up like 'How does Asana compare for distributed teams?' appears — branded AI answer included. Self-serve access coming Q1-Q2 2026. User base skews high-income professionals, making this prime for B2B.