September 22, 2026 · Tuesday

Cover Story · Frontier Models

Grok 4.7 Arrives and Cracks the Agentic-Coding Top Three

SpaceXAI ships its most capable model yet at the same price and speed as Grok 4.6, and the early benchmarks back up the bravado.

Grok 4.7 launch announcement
SpaceXAI's launch card for Grok 4.7, a same-price, same-speed step up from the previous generation.

SpaceXAI released Grok 4.7 on Monday, and the first day of reception read like a corner being turned. Musk framed the launch in the terms that matter most to working engineers: the model now places the lab third, behind Anthropic and OpenAI, on agentic coding, and once its speed and lower cost are factored in, it becomes the everyday workhorse.

The supporting numbers arrived quickly. A model card circulated by early testers showed Terminal-Bench climbing from 20.3% to 38.0% against Grok 4.6, alongside gains on long-horizon office work and a near-perfect score on the AA-Briefcase benchmark. Nvidia, which supplies the accelerated compute behind the run, congratulated the team on its most capable model yet for coding and knowledge work. Grok 4.7 is now live in v0 and on Vercel's Gateway at 40% off through September 27.


Open Weights

Xiaomi Opens MiMo-V2.6, the New Open-Weight Frontier

Two natively omnimodal models, Pro and Flash, ship under MIT license with day-0 support across the serving stack.

MiMo-V2.6 weights release
SGLang announced day-0 inference support for both MiMo-V2.6 sizes.

Xiaomi released the weights for MiMo-V2.6 Pro and Flash on Monday, and the open-weights community responded as if it had been waiting all year. Pro totals 1.02 trillion parameters with 42 billion active; Flash runs 309 billion total with 15 billion active. Both fold text, image, video, and audio into a single checkpoint, with a 1M-token context, native FP8 weights, and a built-in DFlash speculative decoder. Artificial Analysis placed Pro at the top of its open-weights index.

The rollout is as striking as the specifications. SGLang and vLLM both announced day-0 inference support, and the team shipped an RL dashboard and a technical report alongside the weights, an unusual degree of transparency for a lab now pushing the open frontier.

Mathematics

OpenAI Says an Internal Model Cracked Navier-Stokes

OpenAI announced that an internal model, which began training on August 28, has solved the Navier-Stokes equations, one of the seven Millennium Prize problems, and cleared more than a hundred long-open problems across mathematics. The company is working with an independent advisory group of mathematicians to decide how to assess and communicate such results responsibly.

The announcement landed unevenly. While some researchers celebrated a historic result, others questioned the pace of disclosure, and a wave of commentary debated whether the mathematical community is ready for the change.

Delegate coding. Never delegate understanding.

François Chollet
BRIEFS09.22

Robotics · Photo Story

Egocentric robotics dataset
A shuttered startup left the robotics community 1,274 hours of egocentric video with paired arm tracking.

A Startup Gave Its Final Product to the Robotics Community

When most companies shut down, their work disappears with them. Eidon AI chose differently. The robotics startup open-sourced 1,274 hours of egocentric video with paired 7-IMU arm tracking, 13,451 recordings of people doing everyday tasks, under CC-BY-4.0. It is a rare and valuable gift to a field where real-world demonstration data remains the scarcest resource.

Firefly image to video

Adobe Firefly

Firefly's Image-to-Video Tool Is Now Free

Adobe rolled out a free online image-to-video feature that turns stills, sketches, photos, and pictures into motion with fine creative control. It joins a crowded week of image and video releases across the industry.

MORE SIGNAL09.22

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