ChatSlide 3 Lands in Tech's Biggest Week: GPT-6 Astra & More

The first ten days of September 2026 packed more consequential technology news than most quarters manage. OpenAI shipped a model its own president tied to AGI. Apple folded the iPhone. Three AI companies raised $6.13 billion in 48 hours. Google mapped an entire brain, neuron by neuron. Stanford Tech Review called it the week the industry "declared AGI, priced it, funded it and warned against it, all at once", and that is the cleanest one-line summary we have seen.

We had a launch of our own in the middle of it. This post walks through the week's biggest stories, where ChatSlide 3 fits among them, and what the whole stretch means for anyone who makes things with AI.

GPT-6 Astra set the tone

On September 3, OpenAI released GPT-6 Astra, first to a small access program and then to everyone within a day. The headline numbers: a 1,050,000-token context window, near-perfect scores on the major reasoning benchmarks, and $10 per million input tokens, $50 per million output on the API. Greg Brockman called it a "generational leap" that may come to be seen as the arrival of AGI.

Nvidia's Jensen Huang went further, posting on September 6 that "AGI has arrived," and critics like Gary Marcus pushed back within hours. Four days later DeepSeek released V4.1-Flash, an open-weight model that beat Claude Opus 5 and GPT-5.6 Sol on Terminal-Bench 2.1 while pricing off-peak cached input at $0.003 per million tokens. Whatever AGI is, the price of frontier-class intelligence fell all week.

ChatSlide 3: the frontier, inside a workflow

Amid those announcements we shipped ChatSlide 3, and we will say it plainly: it belongs on the week's list of groundbreaking releases, because it collapses the distance between a frontier model launch and a tool you can actually hand to your team the same week.

Two things make this release different from every ChatSlide before it:

• GPT-6 Astra powers slide generation on the Ultimate plan. Astra went live inside ChatSlide on September 4, one day after OpenAI opened the model. Pick it in the model selector and the most demanding decks, dense technical material, long source documents, multi-language projects, get the strongest reasoning engine that exists today.
• World Lab turns a photo into an explorable 3D world. Upload a single photo and ChatSlide reconstructs it as a navigable 3D scene you can drop straight into a deck. In the same week that spatial models became the industry's newest frontier, that capability is sitting inside a presentation tool.

The rest of ChatSlide 3 rounds out a genuinely international product: seven interface languages, pricing in yen, New Taiwan dollars, Singapore dollars and Hong Kong dollars, cloned avatars that speak in their own cloned voices, and web page or YouTube links as first-class deck sources. The full changelog lives on our What's New page.

The pattern worth noticing: the lag between "new frontier model exists" and "new frontier model is doing useful work in an application" used to be measured in quarters. This month it was one day.

The money: $6.13 billion in 48 hours

The venture market moved as fast as the labs. Between September 8 and 9, three companies raised a combined $6.13 billion at a combined post-money valuation of $87.5 billion (summing the three announced rounds, with Mistral's €3 billion converted at the rate implied by its reported $24 billion valuation).

Three different layers of the stack, a coding agent, a model lab, a legal vertical, each drew a mega-round in the same two days. Investors are betting the AI economy has room for many winners, which is also the bet every application builder is making.

Science delivered the week's quietest blockbusters

Google Research and HHMI Janelia published the complete connectome of a male fruit fly's central nervous system on September 3: more than 166,000 neurons and roughly 125 million synaptic connections, the largest brain ever mapped at this resolution, published in Cell after a decade of work.

Two days earlier, Fei-Fei Li's World Labs introduced Atlas, an omnimodal world model that builds persistent, explorable 3D environments from a single photo and generates 1440p video with pixel-level camera control. Spatial intelligence, the idea that models should reason about the physical world rather than just describe it, stopped being a thesis and became a product category this week.

Apple folded, and the warnings landed

At its September 9 event Apple introduced the iPhone Duo, its first foldable: a 5.4-inch outer display opening to a 7.6-inch canvas, $1,999, shipping October 23.

The same week produced the strongest safety signals the field has seen. Anthropic researcher Jacob Coxon resigned publicly, warning that the labs are "gambling with our lives"; his thread drew roughly 76 million views overnight. A day later Anthropic published a 154-page threat intelligence report documenting real misuse it disrupted across seven harm areas. Capability, money and caution all peaked in the same news cycle.

What this week means if you build with AI

Our read, as a team that shipped into the middle of it: the frontier is now an application race. Models leapfrog each other every few weeks, open-weight releases keep collapsing the price floor, and the differentiation moves to who can put that capability inside a real workflow fastest. ChatSlide 3 running GPT-6 Astra one day after the model's release is our answer to that race, and the $87.5 billion investors just assigned to three application-and-model companies in 48 hours says the market agrees.

If you want to see what a frontier model feels like inside a working tool, try ChatSlide 3 with your next deck, or start with the What's New page to see everything that shipped.

Cover image: AI-generated illustration.