I co-founded Opendoor ($10B+ rev). Today, I’m launching Summation. We raised $35M from Benchmark & Kleiner Perkins to build an AI analyst you can trust. Here’s where Claude and ChatGPT fall short: 🧵

We spend most of our time building AI analysts for wickedly hard business problems. So naturally, we pointed one at an equally serious problem: winning your fantasy football draft. 1M+ simulations. Projections. Player news. Live draft recommendations. Free: summation.com/fantasy-footba…

i really don't want to use your agent, i want to use my agent to use your thing.

Your dashboard tells you the number is red. Then it hands you a week of work. That's the dashboard tax. @_summation dashboards remove it. Ask what drove it. Ask for a report. Turn it into a deck before the meeting. Same governed data the whole way. ➡ summation.com/ai-analyst

me, begging, crying, on my knees: "Please just use plain english, I don't understand what you're saying." Claude: "The right fix, and the book's lesson applies: the tutorial rotted as a front door because a front door full of claims always rots. So the new root holds only what's timeless — the thesis and three doors — and every claim lives behind it in the thing that goes red when stale."

Beginning July 20, Claude Fable 5 will be included in all Max and Team Premium plans, at 50% of limits. Pro and Team Standard users will continue to have access to Fable via usage credits, and will receive a one-time $100 credit. Demand for Fable has been challenging to predict, which is why we rolled it out to subscription plans in stages, extending access several times as we secured additional capacity.

AI adoption in finance is hitting a wall. We surveyed 129 CFOs and finance leaders to find out why. The top concerns: 71% say AI models aren't accurate enough to trust, 44% worry about cost and 36% can't justify the ROI. On the adoption side, integration complexity and skills gaps on the finance team top the list of barriers. Yet 95% are still willing to pay a premium for tools that actually work. CFOs want AI and they're willing to spend on it — the products just aren't delivering yet. Read the full survey findings for a breakdown of what it will take to close the gaps: okt.to/OTft1J

Hey there, I built something. I generate a lot of code, docs and analyses with Claude. I got frustrated with the feedback loop that made it hard to give the agent meaningful feedback it could learn from. You copy-paste comments, you fire up a Google Doc, or you just don't review and ship the slop. Instead, I built grade (.) dev. A collaborative review tool for AI markdown artifacts. Your agent pushes a markdown doc (prose, code, mermaid) over MCP. You leave comments inline to a specific code line, mermaid node or sentence. The agent reads them back through the same MCP. I use it to teach Claude my coding style, get a friend input on something, … Kind of a personal RLHF! If you have been around long enough to remember pastebin: think of grade as the grown up version, built for the agent era. Free, every review auto-expires. Have fun! Link👇