$ANT Pre-IPONasdaq Global SelectS-1 filed Oct 26Expected: Mid-November 2026 (reported)H1 2026 revenue $16.3BQ3 2026 revenue $16.96B9M 2026 net loss ~$104BCash & equivalents $112.4BHaiku 5.5 $0.10/M inOpus 5.5 $4/M in
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A startup says an unreleased Anthropic model proved an 18-year-old quantum conjecture

Physical Superintelligence says a research system built on a non-public Anthropic model proved the Aaronson-Ambainis conjecture, with the proof checked in Lean. The FT reports Anthropic is pressing ahead with a pre-Thanksgiving listing at about $1.5 trillion, and UK brokers are lining up for a retail offer. Claude Code cloud sessions can now set up a repository's environment on their own.

Illustration: an ant colony whose tunnels hold glowing server racks

The brief

  1. 01PSI says its system, running instances of a non-public Anthropic model, found a full proof of the Aaronson-Ambainis conjecture on day three of a run. The Lean proof checker accepted it, but the paper has not been peer reviewed, and Anthropic hasn't commented.
  2. 02The Financial Times reports Anthropic still plans to list before Thanksgiving, targeting a valuation of about $1.5 trillion despite this week's tech selloff. That is higher than the $1.2 trillion to $1.3 trillion Bloomberg said buyers were discussing.
  3. 03Hargreaves Lansdown, AJ Bell, eToro, Interactive Brokers, Interactive Investor and Revolut are lined up to take UK retail orders through RetailBook, the FT says.
  4. 04In Claude Code cloud sessions on Pro, Max and Ultra, Claude now works out the dependencies, network access and API keys a repository needs, then saves the environment for next time.

A startup says an unreleased Anthropic model proved an 18-year-old quantum computing conjecture

Physical Superintelligence says a Lean-checked proof came on day three of a run. The proof hasn't been peer reviewed, and the model hasn't been named.

Physical Superintelligence, an AI physics lab that goes by PSI, said Friday that a research system it built proved the Aaronson-Ambainis conjecture, a quantum complexity problem first posed in 2008. PSI says the run used instances of a non-public Anthropic model on its own infrastructure. The system had a complete proof on the third day, and Lean, a proof assistant that checks each step by computer, accepted it. PSI says the system then improved the result twice, and Lean accepted the final version as well.

In plain terms, the result says that on most random inputs, an ordinary computer can predict a quantum algorithm's yes-or-no output with only polynomially more looks at the data. Big quantum speedups in this setting therefore need special structure in the input. PSI's David Turturean built the system and is responsible for the paper's correctness. Four Stanford researchers who proved a special case in August are reading the proof and called it 'a huge result,' according to PSI.

This is the company's own claim. The paper hasn't been through peer review, and PSI hasn't said which Anthropic model it used. Business Insider reports that Anthropic did not respond to a request for comment.

Problem
Aaronson-Ambainis conjecture (2008)
Model
Non-public Anthropic model, not named
Time to proof
Third day of the run
Verification
Lean; peer review pending

Read the full story at Physical Superintelligence

Sources Physical SuperintelligenceBusiness Insider

More from Nov 8

FT: Anthropic presses ahead with a pre-Thanksgiving IPO at about $1.5 trillion

UK brokers are lining up for a retail offer, even as other reports put buyers' valuation talk lower.

The Financial Times reported Friday evening that Anthropic plans to list before Thanksgiving despite the tech rout, targeting a valuation of around $1.5 trillion. That is higher than the $1.2 trillion to $1.3 trillion that Bloomberg said potential buyers were discussing the same day. Anthropic has not filed a price range, so none of these figures are confirmed. Formal marketing could begin as soon as this week.

A separate FT report says RetailBook has been appointed to coordinate an expected UK retail offer, according to a notice on Anthropic's website. Hargreaves Lansdown, AJ Bell, eToro, Interactive Brokers, Interactive Investor and Revolut are lined up to take client orders. Analysts quoted by the FT warned that the recent slide in SpaceX shares could dent retail demand.

Target (FT)
~$1.5T
Timing
Before Thanksgiving (Nov 26)
UK coordinator
RetailBook
Price range
Not yet filed

Read the full story at Financial Times

Sources Financial TimesFinancial Times (UK retail offer)

Claude Code cloud sessions now set up a repo's environment on their own

On Pro, Max and Ultra, Claude works out dependencies, network access and API keys, then saves the setup.

Anthropic's developer account said Friday that it is now easier to get a repository running in Claude Code cloud sessions on the Pro, Max and Ultra plans. Claude works out which dependencies, network access and API keys the project needs, then saves that environment so later sessions can reuse it.

Anthropic says saved API keys are stored securely and Claude never sees them. Its documentation describes stored credentials as being added to outgoing requests outside the session, and environments that finish setup within about five minutes are snapshotted so later sessions skip the install step. The post did not mention Team or Enterprise plans.

Plans
Pro, Max, Ultra
What it sets up
Dependencies, network access, API keys

Read the full story at ClaudeDevs on X

Sources ClaudeDevs on XClaude Code docs

The Claude lineup

Model tracker →
Current Claude model lineup
ModelReleasedInput /MOutput /M
Claude Fable 5.1 Sep 15, 2026 $10$50
Claude Mythos 5.1 Sep 15, 2026 n/an/a
Claude Opus 5.5 Sep 22, 2026 $4$20
Claude Sonnet 5.5 Sep 28, 2026 $2$10
Claude Haiku 5.5 Oct 7, 2026 $0.10$0.50

Prices are per million tokens on the Claude API. Haiku 5.5 rises to $0.50 / $2.50 for prompts over 100K tokens.

Sources Claude Platform models overviewAnthropic: Opus 5.5Anthropic: Sonnet 5.5Anthropic: Haiku 5.5

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