HN reacted less to the launch itself than to the question behind it: can AI finally do useful spreadsheet work inside Excel instead of opening one more chat panel? OpenAI’s beta add-in writes directly in the workbook, explains referenced cells, asks permission before edits, and that raised expectations immediately.
OpenAI says ChatGPT is already being used at research scale across science and mathematics. In its January 2026 report, the company says advanced science and math usage reached nearly 8.4 million weekly messages from roughly 1.3 million weekly users, with early evidence that GPT-5.2 is contributing to serious mathematical work.
On April 9, 2026, OpenAI said on X that it is introducing a new $100/month ChatGPT Pro tier aimed at heavier Codex use. OpenAI says the existing $200 Pro tier will remain the highest-usage option while Plus usage is being rebalanced toward more sessions across a week.
In an April 2, 2026 post on X, OpenAI said ChatGPT is now available in CarPlay. The rollout targets iPhone users on iOS 26.4+ in markets where CarPlay is supported, extending ChatGPT voice mode into the in-car interface.
OpenAI said on March 31, 2026 that it closed a $122 billion funding round at an $852 billion post-money valuation. The company used the announcement to present consumer reach, enterprise growth, API usage, Codex adoption, and compute access as one reinforcing AI platform flywheel.
OpenAI said on March 31, 2026 that it closed a $122 billion funding round at an $852 billion post-money valuation. The company paired the financing news with fresh scale claims including 900 million weekly active users, $2B in monthly revenue, and API throughput above 15 billion tokens per minute.
A March 29 Hacker News thread amplified a reverse-engineering report claiming that ChatGPT uses Cloudflare Turnstile to inspect not only browser fingerprints but also React hydration state before conversation requests. The bigger question is whether application-layer attestation is becoming normal in AI web apps.
OpenAI is rolling out richer shopping in ChatGPT with visual browsing, side-by-side comparison, and up-to-date product data. The company is expanding ACP for discovery, bringing retailers, Shopify Catalog, and a new Walmart in-ChatGPT app experience into the flow.
OpenAI said on X on March 23 that ChatGPT is getting a new Library for uploaded and created files. The rollout adds reusable file storage, recent-file insertion, and broader document continuity across chats.
OpenAI introduced Lockdown Mode and Elevated Risk labels for ChatGPT on February 13, 2026. The changes are designed to give high-risk users stronger controls and make security tradeoffs more explicit as AI products connect to the web and external apps.
OpenAI is rolling out dynamic visual explanations for more than 70 core math and science concepts in ChatGPT. The feature is available globally across all plans and is meant to turn formulas, variables, and graphs into interactive learning modules.
OpenAI introduced ChatGPT for Excel on March 5, 2026. The feature targets paid ChatGPT users and adds spreadsheet-native analysis and formula generation, plus financial data connectivity for regulated workflows.