I @iosfvc publish decision-grade notes for founders and builders, funding outcomes, open-weight economics, and the agent/MCP workflows we actually run.

NYC
Joined August 2016
Pinned Tweet
The YC Myth Is Starting to Crack. YC should not be the default choice for every founder! Across recent 2024–25 YC batches, fewer than 5% have reached Series A so far. Follow me to see more other VC data.
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Seref has been cooking this for a while. Celebrate for the launch!
Today we’re launching @indexnetwork_ It’s been exciting to watch already. The first 100 people in are hiring founding engineers, raising seed rounds, writing speculative fiction. One said accepting an intro “feels like the early magic of the internet.” Try it for yourself: index.network/l/088436b1-baf… The premise: With Index, personal agents can coordinate with each other and thus introduce the right people to their users. They do this by negotiating on their principals’ mutual intents, replacing the need for us to broadcast on platforms and scroll endless feeds. In practice: You log what you're looking for (“signals”) by talking to your agent, it negotiates on fit with the others, and comes back to you with proposed intros for you to accept or pass on. It learns from each turn to surface more relevant people for you. As founders, but also just as internet nerds - we feel the expectation to be constantly visible. It can be empowering but also tiring, especially when there’s little certainty in how algorithms will route the right people to see your post. On the market level, economists call this search friction: the idea that many deals are never made because it costs too much to find each other. We call it the right person, wrong time. So that’s why we’re building Index - we’re keen to see what happens when we take social discovery out of the feeds. It’s possible now because of agents. They can help carry the burden of searching, shouting, negotiating, and coordinating in service of finding your others - and we’re so excited to see how this works in the wild. We’re building this for a world where you can trust that the right person is not out there, but right around the corner. In fact, we even made a short film about it.
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Lively animation by Opus about how token is generated
Every AI answer begins as electricity. Then it becomes heat, memory pressure, GPU scheduling, cache hits, kernel tricks, routing decisions, and finally a token on your screen.
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630 TOKEN2049 events. You can’t be everywhere. I built Somewhere to find the rooms worth being in, based on who you are and who you want to meet. Powered by Jev from @typesafeai. Free, on me. Find your people 👇 somewhere-token2049.vercel.a…
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We are looking for an AI investment intern to join the team @IOSFVC . Prefer - base in bay area - familiar with AI - understand AI tech concept - early stage investment (Pre seee to series A) @UCBerkeley @Stanford iosf.vc
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Jev is the new paradigm of AI. It serve as agent verifier with quantifiable outcome.
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The next AI infrastructure winners may not be the companies with the biggest models. They may be the ones that understand the full path from watt to token, and remove friction at every step.
Every AI answer begins as electricity. Then it becomes heat, memory pressure, GPU scheduling, cache hits, kernel tricks, routing decisions, and finally a token on your screen.
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Every AI answer begins as electricity. Then it becomes heat, memory pressure, GPU scheduling, cache hits, kernel tricks, routing decisions, and finally a token on your screen.
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GPT-6 Astra brings Chamgli's umbrella to life #WutheringWaves3ꓸ0 #astra
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GPT-6 Astra is surprisingly good. I asked it to build an interactive blacksmithing experience. It made this — with real-time physics, sparks, sound, and interactions that actually feel right. AI-generated websites are starting to feel less like websites and more like games. astra-forge-azure.vercel.app
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GPT-6 Astra is kind of insane. I gave it an idea. It built the interactive website, coded the physics, picked the music, and turned the whole thing into a video. We’re getting very close to “describe it → ship it.”
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Open-sourcing the agent is table stakes. The margin sits with whoever the agent is allowed to charge for and who distributes that trust to merchants.
We're open-sourcing Claude Commerce Agents. This is a blueprint for building shopping and merchant agents, with reference implementations across retail, travel, telecom, and entertainment.
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Glad to be the judge and talk to builder!
Introducing the Metropolis global hackathon Six weeks to build the next generation of startups on Monad. 4 tracks. Over $250K in prizes for builders. Submissions end October 13th. monad.xyz/metropolis
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Pulled funding data on 1,000+ YC companies across 5 batches. W24: 278 companies. 2.5 years later: 96 raised seed, 25 hit Series A, 4 hit Series B. Only 16 shut down. 60% sit in between, not dead, not funded. YC went from funding insurance to a tournament ticket.
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Five days ago Kimi K3 went open weights at near frontier scores. Today Luna is 80% cheaper. I wrote on Monday that open frontier weights attack closed labs on exactly one axis: API margin. That axis just moved. The app layer keeps collecting the subsidy. xitter.cf/glazecl/status/2082300…
We are committed to pushing the model frontier across cost efficiency, capability, and speed. Starting today, we are reducing prices for GPT-5.6 Luna by 80% and GPT-5.6 Terra by 20% , and offering a faster option for GPT-5.6 Sol in the API. Luna and Terra’s lower prices are reflected in how usage is counted in Codex and ChatGPT Work, so your usage goes further.
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We run an internal Telegram MCP server with 86 tools. The OAuth flow took longer to build than most of the 86 tools combined. PKCE, dynamic client registration, token refresh, multi tenant sessions. Every MCP developer I know tells the same story.
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My colleagues groan when a new server needs auth. Auth is the tax on the whole protocol. Whoever abstracts it away owns MCP distribution.
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The open source business model is quietly breaking, and it is not because of licenses. For 15 years the deal was: code is free, you pay us to host and operate it. Mongo, Elastic, GitLab. The moat was ops pain. AI agents just started eating the ops pain.
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This inverts the classic playbook: 2010s: open core, charge for hosting and uptime. 2020s problem: hyperscalers ate the hosting margin. 2026 problem: agents eat the operations margin. What is left to sell: distribution, trust, and the parts you keep closed.
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Watch where smart projects already point. Moonshot opened weights, kernels, and comm libraries, and monetizes the API. Dorsey's new agent framework assumes self hosting from day one. The era of 'we run it so you don't have to' is ending. The era of 'your agent runs it' started
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