The Ledger

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Disclosure
Mohan: Codeium uses in-house models for autocomplete due to poor frontier FIM
“The things like autocomplete and supercomplete that run on every keystroke are entirely, like, our own models, and by the way, that is still because properties like FIM, fill in the middle capabilities are still quite bad with the current model.”
Varun Mohan Jul 28, 2025 ▶ 1:59:38 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Mohan: Codeium trains smaller, compute-suboptimal models for lower inference latency
“And for our case, our models that we train internally, they might not be the most compute optimal. In other words, we probably could have had a better model by making it larger, but the trade-off would have been latency. We know what the impact of having highe…”
Varun Mohan Jul 28, 2025 ▶ 30:49 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Mohan: Windsurf uses Claude for planning, proprietary models for retrieval and diffs
“No, so actually the way it works is the high-level planning that is going on in the model is actually getting done with products like the Cloud. But the extremely fast retrieval, as well as the ability to, like, take the high-level plan and actually apply it t…”
Varun Mohan Dec 13, 2024 ▶ 25:04 Windsurf: The Enterprise AI IDE
Disclosure
Mohan: Codeium scraped public code because The Pile was too small
“We ended up basically using a lot of open, I guess, permissively licensed code in the public internet, mainly because I think also the pile is, is fairly a small subset. I think maybe after we started, there was the stock that was also came to be, but for us, …”
Varun Mohan Jul 28, 2025 ▶ 13:06 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Mohan: Codeium reached 10k users and 5% daily growth in late 2022
“So right now we have, we probably have over 10,000 users and thousands of daily actives and people come back day over day. Our growth is like around, you know, four to five percent day over day right now.”
Varun Mohan Jul 28, 2025 ▶ 16:52 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Mohan: Codeium to build embedding database infrastructure in-house
“I will just say for us, we will probably just build this in house to start with. And that's because I think the technology probably isn't there yet. And I think if the technology isn't there yet, like waiting on point solutions to come up is a lot harder than …”
Varun Mohan Jul 28, 2025 ▶ 37:09 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Mohan: Windsurf Cascade splits planning to Claude and codebase application internally
“The high level planning that is going on in the model is actually getting done with products like the cloud, but the extremely fast retrieval, as well as the ability to like take the high level plan and actually apply it to the code base is proprietary systems…”
Varun Mohan Jul 28, 2025 ▶ 2:02:08 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Varun Mohan: Codeium does not pay third parties for indexing or custom model serving
“We don't really like pay other providers to do things for our indexing. We don't pay like other providers to do our serving of our own customer models, right?”
Varun Mohan Jul 28, 2025 ▶ 2:03:44 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Varun Mohan: Codeium serves individual users and large enterprises with the exact same system
“When we're serving these products in an environment that works for these large enterprises, we're not going out and being like, we need to build this custom system for you guys, right? This is the same system that serves our entire user base.”
Varun Mohan Jul 28, 2025 ▶ 2:03:55 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Mohan: Codeium will never launch a product with a waitlist
“We, by the way, we will never launch with a waitlist. We will never launch with a waitlist.”
Varun Mohan Jul 28, 2025 ▶ 2:23:43 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Mohan: Codeium uses proprietary autocomplete models due to poor frontier LLM FIM
“The things like autocomplete and super complete that run on every keystroke are entirely like our own models. And by the way, that is still because properties like FIM fill in the middle capabilities are still quite bad with the current non-existent. They're a…”
Varun Mohan Dec 13, 2024 ▶ 22:30 Windsurf: The Enterprise AI IDE
Disclosure
Mohan: Codeium will never launch a product with a waitlist
“We, by the way, we will never launch with a waitlist. We will never launch with a waitlist. That's the thing at the company. We'd much rather be a company that's considered the boring company than a company that, that launches once in a while, and like, hopefu…”
Varun Mohan Dec 13, 2024 ▶ 46:49 Windsurf: The Enterprise AI IDE
Disclosure
Mohan: Codeium bootstrapped with open-source models before training custom FIM models
“Early on, we were able to leverage open source models, sort of bootstrap it internally within our company. But then to ship, we finally had some requirements like, Hey, we want this model to have fill in the middle capabilities and a bunch of other things. And…”
Varun Mohan Jul 28, 2025 ▶ 15:09 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Mohan: Codeium uses heuristics to detect developer exploration versus acceleration modes
“And we have heuristics in terms of capturing Whether or not you're in acceleration versus exploration mode.”
Varun Mohan Jul 28, 2025 ▶ 23:28 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Mohan: Codeium will not expand outside code into legal AI anytime soon
“So it's probably going to be a while before we even consider leaving code. Like that's going to be a big step because the amount of learning we need to do is going to be high. We need to get users, right? We've learned so much from our users already. So yeah, …”
Varun Mohan Jul 28, 2025 ▶ 26:08 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Mohan: Codeium closed 30 to 40 customers before hiring sales VP
“Yeah, we had sold the product to like, 30 or 40 customers of that kind.”
Varun Mohan Jul 28, 2025 ▶ 2:41:36 🕰️ The Oral History of Windsurf (ft. Varun Mohan, Scott Wu, Jeff Wang, Kevin Hou, Anshul R)
Disclosure
Mohan: Over 800,000 developers use Codeium extensions
“We have over 800,000 sort of developers that use that product.”
Varun Mohan Dec 13, 2024 ▶ 1:52 Windsurf: The Enterprise AI IDE
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