reconnAI logs 1,474 updates as GPT-5.5 and Claude Opus 4.7 launch

reconnAI, an independent changelog tracker, has cataloged 1,474 releases, API changes, and documentation updates across ChatGPT, Gemini, Perplexity, Copilot, Claude, and Google Search through May 2026. The list reads like a year-long AI arms race: OpenAI shipped GPT-5.5 in ChatGPT on April 23, 2026, following GPT-5.2 Instant, GPT-5.3 Instant mini, and a 5.2 Personality System prompt update. Anthropic released Claude Opus 4.7 on April 16, while Perplexity launched its Personal Computer for Mac on April 17. Microsoft's Copilot saw the most activity with 789 updates, including GPT-5 powering Copilot Chat by default in December 2025 and a model selector adding GPT-5.2 in January 2026. Gemini logged 304 updates across the same period, with GoogleAI adding a spam policy for back button hijacking and expanding preferred sources to all languages.

Beyond headline model launches, the changelog reveals strategic shifts. ChatGPT began testing ads on free and Go tiers in February 2026, rolling out to Australia, New Zealand, and Canada by April — a major monetization move. OpenAI also improved memory for finding past-chat details, expanded the context window for Thinking, and added deep research updates and fast answers. Bing-powered answer cards arrived in Copilot Chat, while Perplexity shipped weekly improvements through February 2026. For brands, each change can alter visibility in AI-generated answers, making reconnAI's aggregated tracking a practical tool for marketing, SEO, and product teams. The full timeline offers a rare, chronological view of how AI platforms evolve and compete in near real time.