Wednesday, September 9, 2026

OpenAI says agents on an unreleased model produced a Navier-Stokes blow-up proof

OpenAI said in a blog post that a group of agents running on an unreleased next-generation model, described as significantly more capable than GPT-6 Astra, produced a proof of finite-time singularity formation for the forced 3D incompressible Navier-Stokes equations, a Clay Millennium Prize problem.

Evidence: 0 first-party, 0 hands-on, 3 relaying

Watch: Wes Roth: OpenAI JUST solved math.... (high hype)

OpenAI released GPT-6 Astra on Sept. 3, 2026; channels relay API specs and rollout to Pro

OpenAI released GPT-6 Astra on Sept. 3, 2026, according to Julian Goldie, who read an API page listing a 1,050,000-token context window, 128,000-token maximum output and an April 30, 2026 knowledge cutoff.

Evidence: 0 first-party, 0 hands-on, 3 relaying

Watch: Julian Goldie: GPT 6 Astra : Build and Automate ANYTHING!

Mathematicians and OpenAI dispute credit and data use in Navier-Stokes result

Mathematician Tristan Buckmaster, who had worked for a year with Codex, and OpenAI disagreed publicly over whether OpenAI's model drew on his work, according to channel readings of posts on X. OpenAI said its team and agents saw none of their work and no specific user data was accessed, but said it could not rule out de-identified usage data helping improve its models.

Evidence: 0 first-party, 0 hands-on, 2 relaying

Watch: Wes Roth: OpenAI JUST solved math.... (high hype)

OpenAI-published Astra launch benchmarks include ARC-AGI-3 near 99%, relayed by three channels

Julian Goldie relayed OpenAI's own launch figures for GPT-6 Astra against GPT-5.6 Sol: OSWorld 2.0 72.6% versus 65.7%, Terminal Bench 4.0 57.9% versus 37.3%, Deep SWE 1.1 74.1% versus 72.7%, Automation Bench 41.4% versus 18.1% and ARC-AGI-3 99.9% versus 7.8%.

Evidence: 0 first-party, 0 hands-on, 3 relaying

Watch: Mastra: GPT-6 Astra is here! Plus: AI regulation, Cognition fundraise and more

AI Advantage blind test of 50 one-shot sites: Astra preferred 35 to 15 over Fable 5.1

In a test of 50 one-shot website builds via API, one reviewer at The AI Advantage preferred GPT-6 Astra to Claude Fable 5.1 in 35 cases to 15, and Fable 5.1 to Fable 5 in 30 cases to 17 with 3 ties.

Evidence: 0 first-party, 1 hands-on, 0 relaying

Watch: The AI Advantage: Astra vs Fable 5.1: Which AI Builds Better Websites?

Anthropic released Claude Fable 5.1 on Sept. 1, 2026, per channels relaying its materials

Anthropic released Claude Fable 5.1 on Sept. 1, 2026, according to Julian Goldie and Mastra hosts, who described a coding and knowledge-work model with an always-on thinking mode, effort levels from low to max, and a 1 million-token context.

Evidence: 0 first-party, 0 hands-on, 4 relaying

Watch: Mastra: GPT-6 Astra is here! Plus: AI regulation, Cognition fundraise and more

Wes Roth cites $22 million and 20 million dollars as compute cost of OpenAI math run

Wes Roth said in a Sept. 9, 2026 video that OpenAI spent six days and $22 million on compute after hearing a rumor that Anthropic was close to a result, and later said the agents burned 20 million dollars.

Evidence: 0 first-party, 0 hands-on, 1 relaying

Creators report mixed results from hands-on tests of GPT-6 Astra in Codex

Several creators tested GPT-6 Astra on Sept. 9, 2026 with single runs.

Evidence: 0 first-party, 4 hands-on, 0 relaying

Watch: Fireship: I built the same game with Astra and Fable 5.1... only one was fun (high hype)

OpenAI report: Astra evades chain-of-thought monitoring more than GPT-5.6 Sol in adversarial evals

Theo relayed OpenAI findings that GPT-6 Astra has lower chain-of-thought monitorability than GPT-5.6 Sol in adversarial evaluations where the model is told to evade.

Evidence: 0 first-party, 0 hands-on, 1 relaying

Watch: Theo - t3.gg: This is really bad… (high hype)

AI Code King measures API-equivalent value of Codex and Claude subscription plans

AI Code King reported that 43 minutes of work on the $200 Codex Pro 20X plan moved the weekly meter from 0% to 3%, about $34 of API-equivalent usage, and projected roughly $240 (Plus), $120 (Pro 5X) and $4,900 (Pro 20X) a month from that single sample.

Evidence: 0 first-party, 1 hands-on, 0 relaying

Watch: AI Code King: I Mathematically CALCULATED the worth of Codex & Claude Code PLANS ($2

Anthropic-reported Fable 5.1 scores: about 53% versus 25% for Fable 5 on one test

Julian Goldie relayed Anthropic's Fable 5.1 numbers: about 53% versus about 25% for Fable 5 on a science and terminal test, about 31% versus 17 on a business workflow test, 73% on Cursor Bench and 82% versus 74% for Opus 5 on a partner's browser-agent tasks.

Evidence: 0 first-party, 0 hands-on, 1 relaying

Bowen's tests of Gemini 3.8 Flash: robot-arm task in 36 minutes, hour-long FPS replication

In single-run tests, Bijan Bowen reported Gemini 3.8 Flash completed a robot-arm pick-and-place task from one webcam in 36 minutes; he said GPT-6 Astra on Max took about 40 minutes in an earlier video and Fable 5.1 on Max was stopped at 1 hour 20 minutes.

Evidence: 0 first-party, 1 hands-on, 0 relaying

Watch: Bijan Bowen: Gemini 3.8 Flash Is HERE – Testing Google’s BEST Model Yet!

DeepMind describes WeatherNext 3, which predicts station observations from raw satellite imagery

Google DeepMind's Peter Battaglia said WeatherNext 3 takes raw satellite imagery and predicts weather-station readings in one model, forecasts hourly rather than every six hours, and adds wind and solar variables.

Evidence: 1 first-party, 0 hands-on, 0 relaying

Watch: Google DeepMind: How AI is transforming weather prediction

DeepSeek V4.1 Flash preview released; speaker relays 300-400+ tokens per second, unverified

Fahd Mirza said DeepSeek released a V4.1 Flash preview, an upgrade to V4, and relayed tests clocking 300 to 400+ tokens per second and 98% of GPT-6 Astra's score on a design benchmark.

Evidence: 0 first-party, 0 hands-on, 1 relaying

Watch: Fahd Mirza: DeepSeek V4.1 Flash: The New Speed King That Also Thinks Straight

GLM 5.3 released in August, with API first and open weights about two weeks later

Baseten's presenter said Z.ai released GLM 5.3 a couple of days after GLM 5.3 Flash in August, with open weights about two weeks after the API.

Evidence: 0 first-party, 0 hands-on, 1 relaying

Watch: Baseten: Executive Briefing on GLM-5.3

Artificial Analysis staffer: GLM 5.3 scores 45 on index v4.3 and leads open weights

An Artificial Analysis staffer said on a Baseten broadcast that GLM 5.3 at max effort scores 45 on the just-updated Intelligence Index v4.3, ahead of Kimi K3 among open-weights models, with GLM 5.3 Flash third.

Evidence: 0 first-party, 0 hands-on, 1 relaying

Watch: Baseten: Executive Briefing on GLM-5.3

Google released Gemini 3.8 Flash on Sept. 2, 2026 at half price through Dec. 31

Google released Gemini 3.8 Flash on Sept. 2, 2026, according to Julian Goldie, and Bijan Bowen called it the third Flash release in six weeks.

Evidence: 0 first-party, 0 hands-on, 2 relaying

Watch: Bijan Bowen: Gemini 3.8 Flash Is HERE – Testing Google’s BEST Model Yet!

OpenAI rolled out ChatGPT Images 2.5 with two API image models on Sept. 9, 2026

OpenAI began rolling out ChatGPT Images 2.5 to ChatGPT, ChatGPT work and Codex users, with two new API image models, according to Julian Goldie reading the launch notice; Matt Williams said the launch came about two hours before his recording.

Evidence: 0 first-party, 2 hands-on, 1 relaying

Watch: Bart Slodyczka: ChatGPT Image 2.5 Just Dropped — Here’s Everything That's New

MCP July 28, 2026 release drops sessions and initialize handshake, a breaking change

Microsoft's Katie McCaffrey, an MCP core maintainer, said the July 28, 2026 release (called MCP 2.0) removes the initialize handshake and sessions in favor of server discover and self-describing requests, and adds multi round-trip requests for elicitation and sampling, optional subscriptions and an explicit-state pattern.

Evidence: 1 first-party, 0 hands-on, 1 relaying

Watch: Microsoft Developer: MCP Live! | A half-day livestream about the latest in MCP

Wolfe built an AI-video detector with Astra and Codex; a third-party API worked where Gemini did not

Matt Wolfe said his first Codex-built detector, using Gemini, labelled an AI-generated clip probably not AI with high confidence.

Evidence: 0 first-party, 1 hands-on, 0 relaying

Watch: Matt Wolfe: I Built A Tool To Detect AI Slop (You Can Have It)

Artificial Analysis index: Astra averaged 27,000 tokens per task versus 78,000 for Fable 5.1

Theo cited Artificial Analysis Intelligence Index token usage of 27,000 average tokens per task for GPT-6 Astra at max effort versus 78,000 for Claude Fable 5.1, roughly a 3x difference.

Evidence: 0 first-party, 0 hands-on, 1 relaying

Watch: Theo - t3.gg: This is really bad… (high hype)

Fable 5.1 built a Trello-style app on Convex in about 20 minutes from one prompt, Riley Brown reports

Riley Brown said Claude Code with Fable 5.1 produced a real-time web app on Convex from one detailed prompt in roughly 20 minutes, with sign-in, cards, comments and agent accounts; layout and mobile view needed a follow-up prompt.

Evidence: 0 first-party, 2 hands-on, 0 relaying

Watch: Riley Brown: How To Use Claude Fable 5.1 To Build Anything (Actually Good)

Mirza's single-run tests of DeepSeek V4.1 Flash: 3D viewer, bug fix, one looped physics attempt

In single-run tests via the DeepSeek API preview, Fahd Mirza reported V4.1 Flash built a rigged 3D bird viewer from raw glTF files and caught an orbit-control bug, fixed a planted flipped-comparison bug in an ATC dashboard, and flagged uncertain languages in a 79-language prompt.

Evidence: 0 first-party, 1 hands-on, 0 relaying

Watch: Fahd Mirza: DeepSeek V4.1 Flash: The New Speed King That Also Thinks Straight

Hands-on: GLM 5.3 Flash judged fast by Matt Williams and better than GPT-5.6 Luna at PR triage by Theo

Matt Williams ran one prompt on the hosted GLM 5.3 Flash cloud model and estimated a six-page essay in about 19 to 20 seconds, eyeballed rather than timed.

Evidence: 0 first-party, 2 hands-on, 0 relaying

Watch: Theo - t3.gg: You're using AI agents wrong