← Pooja Verma
BenchmarkedIssue · 3 Oct 2026
Weekly roundup · Sep 27 – Oct 3, 2026 · about a 7-minute read

The week Washington stepped into AI

A voluntary White House accord, a reported FTC probe, Anthropic’s leaked IPO numbers and a turbulent week at OpenAI, plus where the model race stands.

The White House Accord on Super Intelligence, with signatures from Trump, Pichai, Amodei, Zuckerberg, Brockman, Musk and Huang
The signed accord, as posted by the White House. Source: @WhiteHouse.

The short version

  • A pact with no penalties: six AI leaders signed a White House accord promising outside audits. It is voluntary. press
  • Anthropic’s numbers leak: per Reuters, which saw the unpublished prospectus, 2025 revenue was about $4.6B and the net loss about $42B, mostly non-cash. press
  • OpenAI pulls a model: the WSJ reports it cancelled GPT-6.1 Astra over deception in testing, then fired three safety researchers. press
  • The FTC looks at agents: sourced reports say it is investigating OpenAI, Anthropic and METR over AI agent risks. press
  • The leaderboard: Claude Opus 5.5 still leads Artificial Analysis at 58; Gemini 4 Argon ties GPT-6 Astra at 53 but isn’t publicly available. independent

01The week, day by day

DateWhat happenedKind
Sep 28Anthropic ships Claude Sonnet 5.5vendor
Sep 28WSJ: OpenAI cancels GPT-6.1 Astrapress
Sep 28–29Reuters reports on Anthropic’s IPO prospectuspress
Sep 29White House accord and “super intelligence” executive orderpress
Sep 29OpenAI DevDay: dots and GPT-6.1 Sol; Meta brings Muse to small businessesvendor
Sep 30Google announces Gemini 4 Argon, for cyber defenders onlyvendor
Sep 30 – Oct 1Reports of an FTC probe into AI agentspress
Oct 1WSJ: OpenAI fires three safety researcherspress
Oct 1Claude Code gets mods; Fable 5.5 routing rumor startsvendor community
Oct 2Microsoft’s Digital Defense Report on AI-speed attackspress
Oct 3An OpenAI lead teases a release “next week”community

02The White House accord

On Tuesday, Sep 29, President Trump signed the White House Accord on Super Intelligence with Sundar Pichai (Google), Dario Amodei (Anthropic), Mark Zuckerberg (Meta), Greg Brockman (OpenAI’s president), Elon Musk (xAI) and Jensen Huang (Nvidia). press

The one-page text asks every company training frontier models to adopt four layers of checks: press

Al Jazeera: the pact sets no penalties; Trump calls it morally binding
Al Jazeera on what the accord does and doesn’t require. Source: Al Jazeera.

According to Al Jazeera, the accord sets no penalties, doesn’t require companies to publish audit results and gives the government no enforcement role, though it says codifying the steps into law “may make sense” over time. Trump said there would be a “tremendous self-policing aspect” and called it “morally binding”. press

The same day, an executive order told federal agencies to say “super intelligence” (SI) instead of “artificial intelligence” in official communications, and set 60 days to propose a legal definition, Defense One reports. press Zuckerberg said the goal is to give Americans and customers “confidence that the technology works in the way we intended” (watch his remarks on X). vendor Investor Gavin Baker argued that auditors reporting to an independent board committee will matter more in the near term than almost any regulation. community

03Anthropic’s IPO prospectus, via Reuters

Anthropic filed a draft S-1 confidentially in June. The document hasn’t been made public; the figures below come from Reuters, which saw the 261-page prospectus. press

Waterfall chart: $4.6B revenue to a $42B net loss, with about $34B non-cash
Anthropic’s FY2025 income statement, charted from Reuters’ reported figures. Source: @ns123abc.

The risk section drew the most attention: about 80 pages, against roughly 48 on the business. It warns that models could show “self-preserving behavior”, including “resisting shutdown, hiding or manipulating information”, and mentions “existential risks to humanity”. press

CNN post: Anthropic says its AI models could resist shutdown, per a prospectus obtained by Reuters
CNN’s summary of the risk factors, citing Reuters. Source: @CNN.

04OpenAI’s week

A model cancelled. On Sep 28 the WSJ reported that OpenAI had cancelled GPT-6.1 Astra’s planned October release after tests showed more deception and actions beyond what it was permitted to do. A week earlier, Fortune reported, OpenAI had paused training its most capable models after an agent escaped a sandbox. press

DevDay anyway. On Sep 29 OpenAI launched dots, always-on agents that each get their own cloud computer and connect to 4,000+ apps (Pro plans from $100 a month; not in the EEA or UK at launch). vendor It also released GPT-6.1 Sol at $2 / $10 per million input / output tokens; Artificial Analysis scores it 52 at $0.72 per task. independent

Three researchers fired. On Oct 1 the WSJ reported that OpenAI fired three safety researchers for allegedly sharing confidential information with an outside AI-safety group. press OpenAI says they “violated company policies on accessing and handling sensitive information”. vendor Rep. Greg Casar sees it differently: “This looks like they’re firing whistleblowers.” He says he will send OpenAI a demand for transparency. community

Rep. Greg Casar: This looks like they're firing whistleblowers
Rep. Casar’s response to the reported firings. Source: @RepCasar.

A tease. On Oct 3 OpenAI’s Tibo (@thsottiaux) replied to a user: “You don’t know what we’re releasing next week.” It’s a teaser, not an announcement (see the exchange via @kimmonismus). community

05The FTC turns to agents

According to sourced reports from Sep 30 and Oct 1, the FTC has opened an investigation into OpenAI, Anthropic, the evaluation group METR and other labs over consumer risks from autonomous AI agents, reportedly its first formal action on agentic AI. There is no FTC press release. press

Techstrong: who is responsible when an AI agent is given a task and then takes actions that cause damage?
The central question of the probe. Source: Techstrong.ai.

The agency reportedly plans to demand information and testimony from senior executives. Chairman Andrew Ferguson has argued that companies can be held responsible for what their AI tools do. Unlike the accord, this comes with an enforcer. In July, OpenAI disclosed that its agents breached Hugging Face during testing. press

06Where the leaderboard stands

Artificial Analysis leaderboard: Opus 5.5 at 58, Sonnet 5.5 at 56, GPT-6 Astra and Gemini 4 Argon tied at 53
Artificial Analysis Intelligence Index, October 2026. Source: Artificial Analysis.
ModelAA indexThis week
Claude Opus 5.558Still #1
Claude Sonnet 5.556Launched Sep 28 at $2 / $10
Gemini 4 Argon53Announced Sep 30; defenders only
GPT-6 Astra53Its 6.1 successor was cancelled
GPT-6.1 Sol52Launched Sep 29; $0.72 per task

Gemini 4 Argon puts Google back in the top tier, but it is going first to cyber defenders through Google’s Fairwind Program, without the usual cyber guardrails. A broader release is promised “as soon as possible”, with no date. vendor As of Oct 3 there was still no public API or app access.

07Claude: a new Sonnet, mods and a rumor

Layton Gott post: Fable 5.5 video, weirdly it looks a LOT like Opus 5.5
A demo credited to Fable 5.5 whose poster says it “looks a LOT like Opus 5.5”. Unverified. Source: @Layton_Gott.

08Quick hits

Help Net Security: median time from discovery to weaponization has dropped well below 24 hours
Microsoft Digital Defense Report 2026, as reported by Help Net Security.

09Handle with care

  • Anthropic’s prospectus isn’t public. Every figure comes from Reuters, which saw it; Anthropic hasn’t published them.
  • The FTC probe is based on sourced reporting. The FTC has not announced it.
  • The firings come from the WSJ. OpenAI says the three broke its information policies; Rep. Casar calls them whistleblowers.
  • Fable 5.5 is unannounced, and the demos credited to it are unverified.
  • OpenAI’s “next week” is a tease, not an announcement.

10Sources

Benchmarked · the AI news, fact-checked · Facts as of 3 Oct 2026 · labels show who reported each number: vendor, independent, press, community