3 minutes to make SecondSource more useful to you
We'd like to know how you actually read this letter — what earns its place, and what wastes your time.
SecondSource Product · 2026/8/10|Ten days to the enterprise cloud
On July 27, Beijing-based Moonshot AI put the full weights of Kimi K3 — a 2.8-trillion-parameter model, 1.56TB on disk — on Hugging Face for anyone
SecondSource Morning Brief · August 10, 2026 | One AI incident, three professional communit…
The story about OpenAI's test agents quietly building themselves a message board was finished last week. What actually moved in the past four days is
[Delivered] SecondSource Morning Brief · August 9, 2026 | Jira's parent halved its growth guidance and…
This issue arrived about 13 hours later than usual today — apologies for the delay.
SecondSource Morning Brief · August 8, 2026 | Washington just barred every "foreign-produc…
The US Federal Communications Commission added the entire class of "foreign-produced advanced robotic devices" to its banned-equipment list on July
SecondSource Deep Dive · 2026/8/7|The Last License War: The Clouds Never Paid — So What Is Moonshot Collecting?
Start by finishing the thread Kevin Xu left hanging. In an earlier era, he wrote, there was constant conflict between open-source infrastructure
SecondSource Morning Brief · August 7, 2026 | Kimi K3 put its 2.8 trillion parameters on t…
This issue arrived about 13 hours later than usual today — apologies for the delay.
SecondSource Morning Brief · August 6, 2026 | The open-weights letter grew to 270 signator…
This issue arrived about 12 hours later than usual today — apologies for the delay.
SecondSource Morning Brief · August 5, 2026 | The commentator least likely to underestimat…
This issue arrived about 13 hours later than usual today — apologies for the delay.
Qwen3.8-Max, at 2.4 trillion parameters, is…
Alibaba's flagship model Qwen3.8-Max moved from preview to official release yesterday, API-only for now — and the company firmed up an open-weights
SecondSource Deep Dive · 2026/8/2|The Software Split Is Real, but the Line Is Drawn Wrong: Six Months of Receipts on the Token Pass-Through Hypothesis
Start with the hypothesis in its own words. Gooaye's two scripts run like this. Scenario A: you used to sell seats the traditional
Sellers admit productivity has no yardstick…
The people selling AI just said, out loud, "we haven't figured out how to measure productivity." OpenAI's productivity lead named token usage the
Capex headlines aren't AI order books —…
The automatic translation machine that turns "hyperscaler capex raised" into "the whole AI supply chain wins" should be switched off: Amazon's $200B
SecondSource Morning Brief · July 30, 2026 | AI Solved a Math Conjecture Open Since 1997, and This Time the Verification Chain Is Complete: Machine-Checked at Every Step, Hand-Checked Line by Line by All Three Authors. But the Credit Went to the Wrong Model — the Professor Says He Used Last-Generation 5.5 Pro; OpenAI's President Billed the New Flagship 5.6
A statistics professor used ChatGPT to generate a proof, had a machine verify it step by step, and had all three authors check it line by line —
SecondSource Deep Dive · 2026/7/29|---
title: "The Guarantor Falls, the Guaranteed Rise: Circular Financing Is Now Priced in the Bond Market"
SecondSource Morning Brief · July 29, 2026 | Nvidia Fell 5% on News It May Backstop OpenAI. The Viral Read — "The Market Has Turned" — Compares the Wrong Companies; the Real Signal Is in the Bond Market, Where Insuring Nvidia's Debt Doubled in Price to a Record in One Month
News broke that Nvidia may backstop up to $250 billion of OpenAI's data-center financing, and Nvidia itself fell 5% that day. But on the same day, on
SecondSource Morning Brief · July 28, 2026 | Kimi K3's Weights Are Open — With a License That Says Big Companies Sign First. "Open Weights" No Longer Means "Free for Commercial Use," and Only One of Ten Chinese Labs Followed
Moonshot AI, the Chinese lab behind the Kimi models, published the weights of its new flagship Kimi K3, with a license that says inference providers
SecondSource Deep Dive · 2026/7/27|No One Gets to Be TSMC: Why Everyone in AI Is Becoming an Integrator
The foundry/IDM framework in this essay borrows heavily from Ben Thompson's long-running semiconductor analysis at Stratechery; what this newsletter
SecondSource Morning Brief · July 27, 2026 | Two Months Ago OpenRouter Was Worth $1.3B. Now Stripe Is Offering Nearly $10B — the "Route Models, Never Build Them" Neutral Seat Just Got a Price Tag
A reporter has now put a name to the mystery buyer offering close to $10 billion for OpenRouter, the AI model middleman: it's Stripe, the global
SecondSource Morning Brief · July 26, 2026 | Xi Gives His First AI Speech and Plants the Flag for Openness; Washington's Betting Market Doubles the Odds of a US Open-Source Ban to 45% — Three Fronts Escalate in 48 Hours
The open-source war throughout this issue, "open source" includes open-weight models escalated on three unconnected fronts within 48 hours: Beijing's