Mo Explains
Is There a ChatGPT Watermark? Only in the EU, for Now
Is there a ChatGPT watermark? OpenAI is marking ChatGPT text in the EU but not the US yet. Here's who can detect it and how Claude and Gemini compare.
OpenAI
Articles about OpenAI on Mo Explains, newest first.
20 articles
Should You Connect Your Bank Account to ChatGPT? What It Sees and What to Set First
Should you connect your bank account to ChatGPT? Finances is read-only and runs through Plaid. Here's what it can see and which settings to check first.
ChatGPT Dots Are Here. Set These Rules Before Yours Touches Your Card.
ChatGPT dots are always-on agents in every Pro plan from $100 a month. Who gets one, how to set it up, and the rules to set before it spends your money.
Claude Sonnet 5.5 Got Smarter and Cheaper. That's What I Want From Every Model Release.
Claude Sonnet 5.5 runs 30% faster than Sonnet 5 and costs up to 30% less per task. Who gets it free, the max-effort catch, and why I think Anthropic's on track.
ChatGPT Pro 500 Is Official, and It's for the Busy Months
ChatGPT Pro 500 is official: $500 a month and the only Pro plan with Astra Ultrafast. What changed for Pro 200, and the one busy month I'd actually buy it.
ChatGPT Stopped Switching to Thinking for You. Here's How to Pick Instant vs Thinking.
ChatGPT Plus and Pro stopped switching to Thinking for you on September 14. Here's how to pick ChatGPT Instant vs Thinking, when each is enough, and what Pro costs.
GPT-6 Sol and Luna Are Here. Here's Where You'll Actually See Them.
GPT-6 Sol and Luna launched September 22, 2026 in ChatGPT Work and Codex, not regular chat. Where they show up, the 50% API price cut, and my honest take.
ChatGPT Keeps Erroring for Plus and Pro Users. Here's What OpenAI's Status Page Says.
ChatGPT errors hit Plus and Pro subscribers three days running. Here's what OpenAI's status page lists, how to check it yourself, and what to do when it fails.
OpenAI Is Retiring Custom GPTs. Here's What Happens to Yours.
Custom GPTs retiring: OpenAI set December 11, 2026 for all plans. Here's what carries over to plugins, what doesn't, and what you should save this week.
ChatGPT Now Has Sponsored Agents. Here's Who You're Actually Talking To.
ChatGPT sponsored agents let you chat with a brand's bot after tapping an ad. Here's who sees them, how they're labeled, and what OpenAI still hasn't said.