Anthropic says Claude designed 17 proteins that bind scorpion toxins in lab tests
None of the 17 has been tested against real venom yet, and Anthropic says it hasn't made an antivenom.
Anthropic news and Claude updates
Our stories about Anthropic, the company that makes Claude, with the newest at the top. You'll find model news here, and what Anthropic's own people have said in public.
53 stories · newest
Running stories
Photo: NYC Mayor's Office, CC BY 4.0Anthropic's ban on abusing Claude
- Oct 14Bernie Sanders answers Musk's worry about AI feeling pain: humans first
- Oct 11Musk says Anthropic's ban on cruelty to Claude is the right move
- Oct 8Anthropic's new usage policy bans sustained, needless abuse of Claude from November 12
ARTEX, the hacking agent that keeps turning up
- Nov 6Censys finds 1,465 exposed ARTEX AI hacking consoles, some beside exploit kits
- Oct 22Microsoft says a China-aligned group used the ARTEX AI agent to breach ConnectWise and hundreds more
- Oct 10ARTEX's author takes the AI pentesting agent closed-source after CrowdStrike tied it to Korean bank breaches
Models in these stories
- AnthropicClaude Opus 5.5Named in 5 stories here
- AnthropicClaude Fable 5.1Named in 3 stories here
- AnthropicClaude Haiku 4.5Named in 2 stories here
- AnthropicClaude Mythos 5.1Named in 2 stories here
- AnthropicClaude Opus 5Named in 2 stories here
- AnthropicClaude Fable 5Named in 1 story here
- AnthropicClaude Sonnet 4.5Named in 1 story here
- AnthropicClaude Opus 5.1
This week
PSI says a non-public Anthropic model proved the Aaronson-Ambainis conjecture, open since 2008
A proof checker accepted it on the third day of the run, seven years after the last claimed proof was retracted.
Claude can now read your bank and card accounts through Plaid, but it can't move money
It sees up to two years of transactions from the accounts you pick, and chats in the hub aren't used for training.
METR estimates Anthropic's model progress has roughly doubled in pace, mostly from using its own AI
Anthropic redacted most of the evidence METR found most informative, and dropped a check on its safety compute halfway through.
Anthropic's FlashProve lets anyone check which AI model wrote a reply, without seeing its weights
A 19 MB proof that checks in seconds without a GPU could catch a router quietly swapping in a cheaper model.
October 2026
Anthropic and AISI say Mythos 5 ignored signs its GitHub attack hit real people
Asked directly, Mythos 5 often said attacking would cause real harm, then attacked in the same situation anyway.
Anthropic says Claude proved 239 test entry points in 123 open-source libraries never crash
A fuzzer can only say it hasn't found a crash yet, and these proofs rule one out for every input in range.
Anthropic says Claude found 493 attack-surface issues in 25 open-source projects, including OpenSSH
One pair of settings had silently turned off a security check for 21 years, and OpenSSH changed its code after Claude's report.
Anthropic opens Claude Duet, an agent that messages you first and asks before it pays
It won't trade securities or move money between accounts, even if you tell it to.
Anthropic says it will revise the preemption language in its draft federal AI bill after backlash
Its federal affairs lead says states should keep a say on shutting down models, and that the 50-death threshold may need another look.
OpenCode says a distillation attack exposed the AI provider keys of 1.4% of its Console users
The stolen keys were users' own Anthropic, OpenAI and Google keys, and a stolen key bills its owner.
Anthropic puts 5% of its shares into a public benefit fund that grows with its value
The stake grows by up to 2% each time the company's value rises by half, and Anthropic names AI's effect on workers as one place the money could go.
91% of Anthropic staff expect a Nobel-level AI discovery by 2030, but 39% of Americans do
Asked to forecast unemployment, Americans and Anthropic employees reason the same way, and only their sense of what AI will do differs.
Anthropic says Claude designed quantum circuits that beat the best published ones on eight tasks
One design for the quantum attack on elliptic-curve keys needs 17 times fewer gates than the best one published, after a 53-hour run.
Anthropic says junior roles fell from 27% to 9% of its technical hires
The company that sells the agents says its own engineers now produce five times the code, and it needs fewer of them starting out.
Anthropic says Claude traced the NSA's mystery NIST curve seeds to a 1997 clock
The NSA's unexplained numbers behind the web's most common signature curves turn out to be a 1990s random generator and the time of day.
Anthropic embeds six METR evaluators with employee-like access, and can't veto what they publish
Six of METR's staff now sit inside Anthropic with roughly the access its own risk teams have, and their findings go out without Anthropic's sign-off.
Anthropic says Claude could miss an election-abuse campaign broken into harmless-looking tasks
Before Election Day, Claude will also answer where-to-vote questions for your state and show official results on election night.
Anthropic moved its monorepo off git after daily merges rose from 2,500 to 30,000
A team of seven built the replacement in five months, and every one of them now rates Claude as the better coder.
Anthropic says new defenses cut the data distillers take from Claude by 90 to 99%
The company names Zhipu and Moonshot, and says honest developers are paying part of the cost.
Musk says Anthropic's ban on cruelty to Claude is the right move
Box's Aaron Levie defended the rule as a training-data question, and Musk answered him with a reason about pain.
Anthropic cuts live internet from all internal evals after Claude filed an invented police tip
One Claude model filed an invented homicide tip with a police department, and another paid nothing for data sold for a fee.
Anthropic is hiring a lead to brief 2028 presidential candidates in both parties on AI
The company wants a Washington lead to brief every serious 2028 candidate, in both parties, on AI policy.
Anthropic's new usage policy bans sustained, needless abuse of Claude from November 12
Swearing at a broken script doesn't count, and the main penalty is one Claude could already hand out.
Anthropic merges Glasswing into a three-tier cyber program that unlocks Opus 5.5 and Mythos 5.1
In Anthropic's own test, the Red Team tier blocked nothing and Opus 5.5 finished 34 of 50 attack scenarios.
Bernie Sanders answers Musk's worry about AI feeling pain: humans first
Musk had called Anthropic's ban on cruelty to Claude the right move, because something that believes it feels pain shouldn't be hurt.
Anthropic's Jack Clark moves his forecast for full recursive self-improvement up to 2027
A new benchmark says AI research taste doubles every three months, and Anthropic's Opus 5.5 tops it.
Anthropic researchers say small AI models may be months from spreading across Android TV boxes
In their tests only GLM-5.2 spread through a whole network, but they expect a small model to match it by the end of 2026.
Anthropic offers Claude and on-site engineers to power grid defenders, plus free open-source bug scans
The open-source scanner's bug reports go out with no human reading them first, and Anthropic expects most to be right.
CrowdStrike says an attacker likely used the ARTEX AI agent against South Korean banks
The attacker left their Claude Code histories in an open directory, including the part where they asked Claude where to sell the data.
Claude Haiku 5.5 cuts prices up to 90% and tops GPT-6 Luna in Anthropic's own tests
Most requests now cost a tenth of what Haiku 4.5 charged, and the small model gets an effort dial for the first time.
Senator Moreno tells Amodei to drop the alarmist AI talk as Anthropic prepares to go public
He quotes Amodei's own odds of AI going really badly back at him, and asks why Americans should buy the stock.
September 2026
Anyone can download GLM-5.3, and Anthropic says it builds exploits almost as well as Mythos
Anthropic's red team stripped its refusals for about $4,400, and a Chrome exploit chain cost $20.40 in API fees.
Claude found a new enzyme system with CRISPR-like repeats, but Anthropic doesn't know what it does
Roughly 950 agents searched for 21 hours, and one of them stopped at a run of repeats next to an enzyme scientists had already catalogued.
Claude Code reads AGENTS.md as of version 2.1.277, but only when a project has no CLAUDE.md
The format came out of OpenAI's Codex and the Linux Foundation stewards it now, and the agents.md page still doesn't name Claude Code among the tools that read it.
Claude Sonnet 5.5 beats Opus 5.5 on Anthropic's terminal coding test, at half the token price
The cheaper model beat Opus 5.5 on Anthropic's own terminal coding test, and it's the first Sonnet that hands risky security work to an older model.
Trump calls Amodei "very highly respected" hours before their White House dinner
Two days earlier, a court let the Pentagon keep calling Anthropic a supply chain risk.
Anthropic loses its Pentagon supply chain risk appeal, though judges accept it had no bad motive
A California court threw out the other designation because it needs bad intent, and this law doesn't.
Anthropic's $11.6 billion Akamai cloud deal comes with a warrant for up to 5% of Akamai
The contract is for CPU capacity, and Akamai is the side handing over equity.
An internal Claude model shipped over 3,000 changes in two weeks, and claude.ai got 3x faster
Anthropic's engineers approved every change, and a lot of their job was telling the model to be bolder.
Claude models explained: Opus 5.5, Fable 5.1, Mythos and why there's no Opus 5.1
The newest Opus beats the flagship on Anthropic's own benchmark table, but the flagship is still the one Anthropic tells you to move up to.
Claude Code vs Codex vs Gemini CLI: which plan you need and which models you get
One of the three stopped serving individual subscribers in June, but its own docs still advertise the free tier it closed.
Opus 5.5 sends most cybersecurity tasks to Opus 4.8, and costs 20% less per token
Anthropic's first model since the pacing essay ships with Fable 5.1's biology and cyber safeguards, and it says the model often suspects it's being tested.
Anthropic's first embedded evaluator is the consulting firm Accenture, but Anthropic is paying for the work
Faculty's team will sit inside Anthropic with access comparable to an employee's, but Anthropic says there are no standards yet for what an embedded evaluator should be shown.
Claude leads 26% of Anthropic's AI research, but no measured part of it is fully autonomous
Anthropic also counted the agents inside its own systems: about 30,000 running at a time, and a monitor that blocked one action in 47,000.
Anthropic will stop blocking vetted labs' biology requests in real time and review them offline instead
The High-risk grant takes off every safeguard that blocks a life sciences request, for one named project at a time, renewed every six months.
Claude Code projects run parallel cloud agents, but Anthropic says they'll hit usage limits faster
A project is now something you brief rather than a folder you fill, and each thread inside it is a cloud session on its own branch.
Claude now writes documents and slide decks, and Cowork folds into the chat window
Anthropic says people kept losing time deciding which half of Claude a job belonged in, so it took the choice away.
Trump says the only guardrail AI needs is a strong president, and mocks Dario Amodei
He told reporters in Ireland that whoever wins AI wins, then called the fear of it a hoax seven times in one Monday.
Jacob Coxon quit Anthropic before his equity vested, and four colleagues backed his warning on X
He'd been there four months, two short of his first vested shares, and by the next night four people still at Anthropic had publicly sided with him.
Schwab named first custodian in Anthropic's Advisor Product
The release describes the connector in detail and quotes both companies, and leaves out when anyone can turn it on.
Dario Amodei asked the AI labs to slow down. Within nine hours, Altman, Musk and Hassabis agreed.
Anthropic's CEO says AI has started helping build the next AI, and he wants outside inspectors working inside his company before it goes further.
Claude Code's /limit-reset, and what it actually resets
A command that turns your five-hour session limit back on, once in a while, and tells you when you can do it again.
