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Deep Dive — OpenAI's Agents API: renting out the machinery behind Codex

OpenAI spent this week handing out its plumbing. On September 10, the company put the Agents API into public beta: a managed service that exposes the same harness and infrastructure behind Codex — context management, tool use, multi-agent orchestration — through a single API call. As we covered in our brief on the launch, developers specify a task, a model, tools and an environment; OpenAI spins up the Codex harness, fans work out to parallel subagents that each keep their own context, compacts…

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AI 101 — What is LoRA (low-rank adaptation)?

LoRA is a way of customizing an AI model by training a tiny add-on instead of rewriting the whole thing — the base model's weights stay frozen, and a small pair of "adapter" matrices carries the change. If you have read that someone "dropped a LoRA" to teach an image model a new style, or that a community fine-tune of an open-weight model was trained on a single GPU, LoRA is the technique underneath.

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Adobe's AI revenue is real — the market just billed it as a cost

Adobe beat on revenue, more than doubled its AI-first recurring revenue, and still watched the stock slip. The disconnect is worth reading closely, because it tests a question every incumbent software company is now facing: does AI show up as growth, or as the reason customers expect to pay less? Adobe beat Wall Street on Thursday with quarterly revenue of $6.76 billion against a $6.70 billion consensus — but the stock fell about 2% in extended trading after Q4 guidance came in just short.

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Pentagon in talks to lend $5 billion to AI cloud startup Fluidstack

Two money stories lead a heavy AI news day: Washington may become a direct lender to the AI cloud buildout, and a defense-AI startup just doubled its valuation in three months. The Pentagon is in talks to lend roughly $5 billion to Fluidstack, the neocloud that has become one of the fastest-growing AI infrastructure startups, according to the Wall Street Journal. The company has been advised on its loan application by Erebor Bank, the tech-focused bank co-founded by Palmer Luckey.

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Microsoft plans to more than triple data center capacity to 38 GW

Microsoft's data center footprint is about to get unrecognizable. According to a Bloomberg report citing people familiar with the plans, the company intends to expand its global data center capacity from roughly 12 gigawatts today to more than 38 GW by 2032 — an addition of about 26 GW, or more than triple the current base.

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Slack's Surfaces turn chat into a dashboard builder

Slack is blurring the line between chat and the BI tool. Slackbot can now build interactive dashboards and reports inside your Slack chats. The feature, called Slackforce Surfaces, lets anyone in a workspace ask Slackbot for a tool in plain language — say, an arcade-themed visualization of AI token usage across sales, design, and engineering — and get back an interactive dashboard rather than a static chart.

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OpenAI opens its Codex agent harness to every developer with the Agents API

Two days after the full-duplex voice model hit the API and a day after ChatGPT went free for 23 million US public servants, OpenAI is handing developers its agent machinery. The company introduced the Agents API in public beta: a managed service that exposes the same harness and infrastructure behind Codex — context management, tool use, multi-agent orchestration — through a single API call.

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OpenAI puts its full-duplex voice model in the API at $0.05 a minute

OpenAI shipped twice in one day — a voice model developers can finally build on, and a finance product that has Wall Street asking what happens to the apprenticeship. Both push the same thesis: AI stops being an assistant you prompt and becomes infrastructure you assemble. OpenAI put GPT-Live-1, its full-duplex voice model, into the API at $0.05 per minute for the voice layer.

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Open Source Radar — September 10: agents get their hands on physical space

Today's board finally leaves the terminal. Three of the five hottest repos are about agents producing geometry you can build, print, or move a wall through, and the other two are about giving a whole team — or a whole desktop — a shared agent setup. Pascal Editor (TypeScript, 23,200 stars, MIT) — An open-source 3D building editor, built on React Three Fiber and WebGPU, that runs in the browser or from a local CLI and exposes the scene to agents over MCP.

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Kepler Computing leaves stealth with $468M to fix AI's memory shortage

Two things landed overnight: a memory startup with serious money behind a claim that matters to every AI data center, and a computer-vision paper that wants to turn ordinary human video into robot skills. Kepler Computing emerged from stealth with $468 million and a claim the AI industry desperately wants to be true: more HBM and SRAM density without EUV machines.

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Open Source Radar — September 9: video, plugins, and a 2B model

Today's board splits four ways: a renderer that turns agent-written HTML into real video, a skill that cuts the preamble out of agent answers, OpenAI quietly moving Codex's extension surface into one marketplace, and an open-weights 2.5B model that says it beats everything in its weight class. HyperFrames (TypeScript, ~48,200 stars, Apache-2.0) — HeyGen's open-source renderer takes HTML, CSS, media and seekable animations and outputs a deterministic MP4.

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AI 101 — What is a diffusion language model?

A diffusion language model writes text the way an image generator paints a picture: it starts with a block of noise and refines the whole thing over several passes, instead of typing one word at a time left to right. Almost every AI you have used does the typing. This is the main rival design, and in the last week it went from research curiosity to something running real phone calls and coding agents. The reason it is in the news is Inception's Mercury 2.5 release, which the company calls the…

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