11 items11 builders

AI Builders Digest

What the people actually building AI said today. One page — a 4-min read.

Aaron Levie laid out the clearest case yet for why the application layer, not the model layer, eats the next trillion dollars, and why AI diffusion outside coding will take far longer than the Valley expects. Guillermo Rauch ditched Electron for Rust and Swift and declared native the future on both desktop and cloud. Underneath both, a quieter theme: builders worrying about what agents do to us, from Thariq's fear of eating productivity gains through laziness to Aaron Levie's read on how agents collapse switching costs across the economy.

Podcast

Training Data

Levie: subsidized tokens are temporary, and the gap between model and workflow is the business

The "LLM wrapper" insult aged badly because the real work in the enterprise is bridging a model's capability to an actual workflow, and that bridge turns out to be vast. Box runs two evals on every model, a complex work eval across life sciences, financial services and public sector, plus a holdback on how Box employees use their own data, and results track coding benchmarks with one exception: Gemini overperforms, likely on tool use. Token subsidies cannot last, because a public company gets held to the same laws of capitalism and eventually has to pay for its training runs too. The prediction to write down: in five years, 90% of enterprise tokens will be work no user ever kicked off, and they just see a result waiting for review. On diffusion, coding won because value creation is almost entirely text and every engineer debugs their own MCP connection instead of calling IT; a sales rep is rate limited by whether the customer replies. There is no "give us your GitHub" for knowledge work.

  • #agents
  • #evals
  • #open-source
X

Guillermo Rauch

Vercel CEO

Rauch rewrote his browser in Rust and Swift, says software will "nativify" fast

He ported his Mini web browser off Electron and Bun to Rust and Swift, and reports it faster, more secure, and nicer to iterate on than the JS stack it replaced. The cef crate lets him bundle current Chromium while getting Liquid Glass, faster boots, and the fine-grained focus and input control he calls nightmare fuel in JS. An agent embeds via fx acp talking to his local fx CLI over ACP, which then drives the browser through an MCP server. His bet: the whole software world nativifies faster than people expect, desktop and cloud alike, with Vercel's Fluid positioned to support it whatever language you pick.

  • #products
  • #open-source
X

Aaron Levie

Box CEO

Levie: agents making optimal choices for users will gut switching costs

Once agents reliably pick the best or most efficient option, any business whose margin depends on customers being too lazy to switch is in trouble, and competition in those markets intensifies until a new equilibrium lands. The flip side is larger: markets currently suppressed by friction, healthcare, travel, local services, certain information services, get unlocked because buying stops being painful. His framing is that a future meaningfully mediated by tireless agents cannot possibly function like today's economy.

  • #agents
  • #products
X

Thibault Sottiaux

OpenAI Codex & ChatGPT

OpenAI's Codex lead: code freeze is over, and code may be generated per request

Code freeze before releases is no longer really a thing. He pushes it further: in the future code might be generated online per request, according to a set of constraints, rather than shipped as a frozen artifact.

  • #agents
  • #products
X

Matt Turck

Turck: certainty about AI outcomes correlates inversely with understanding AI

The researchers who actually know how these systems work mostly believe in neither doom nor uncontrollable takeoff. The people with the most definite, most certain views are the ones furthest from the work.

  • #policy
X

Peter Steinberger

Steinberger plans to let Codex decide which tests run, and gut CI

CI load is becoming a sponsorship problem worth distributing rather than absorbing. His fix is to hand test selection to Codex, let it decide which tests actually need to run, cut CI drastically, and move the full suite to an hourly cadence instead of per-change.

  • #agents
  • #evals
X

Zara Zhang

Zhang: shiny new tech makes you blame yourself when it isn't working

New technology can be dazzling enough to hide where it is failing, and the failure gets internalized: if it is not working, you assume the fault is yours, because the world is moving fast and everyone looks further along. Separately, on why she posts without monetizing, self-expression needs no utilitarian justification, and influence is worth far more than money.

  • #products
X

Dan Shipper

Every CEO

Shipper: the rational-agent industry is panicking as humans adopt rational agents

A one-line skewer of an economics profession built on modeling humans as rational agents, now unsettled by humans actually delegating to rational agents.

  • #agents

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Source data comes from the open-source project follow-builders by zarazhangrui, released under the MIT license. Summaries are generated by an LLM from that project's public feeds, and the summarization prompts are adapted from it. Every item above links to its original source.

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