The Archive

The AI giant's co-founder explained why the company may tap the public market for capital and why tokenmaxxing pushback isn't a concern.

Some of the AI industry's biggest rivals have put their many, many grievances aside for a common cause: making it harder for people to use their technology to develop biological weapons. In an open letter to US lawmakers, tech leaders are pressing Congress to enact rules closing what they say is an alarming biosecurity gap that could help trigger a global pandemic. Anthropic's Dario Amodei, OpenAI's Sam Altman, and Microsoft's Mustafa Suleyman are among the signatories urging US lawmakers to require companies selling synthetic DNA and RNA - genetic material that can ordered online and assembl...

Lovable and Google signed an expanded multi-year deal athat involves a 5x expansion of Lovable's footprint on Google Cloud, and expanded access to Anthropic Claude.

When an AI agent calls an API and hits a validation error, it needs more than what went wrong -- it needs what to do next. A self-reflective API returns, on validation failure, a machine-readable recovery\_feedback.suggestions[] payload sufficient for the agent to repair the request and retry without external reasoning. On a leak-audited pilot ($N{=}30$ per cell, 3 LLMs, 10 adversarial tasks), structured suggestions lift task-completion rate by $+36.7$--$40.0$pp over plain-English diagnoses on Anthropic models (Fisher's exact $p \le 0.0022$), at $1.8$--$2.2\times$ better per-success token eff...

Anthropic is expanding Project Glasswing, its security vulnerability program, and access to Mythos to 150 organizations across 15 countries — targeting critical infrastructure in power, water, healthcare, and communications where a cyberattack could affect 100 million people.

After months of speculation about whether OpenAI or Anthropic would be first in their race to IPO, Anthropic on Monday reached a key milestone: filing to kick off the process with the U.S. Securities and Exchange Commission. The filing sets the stage for what's sure to be a massive IPO. As of its fundraise last week, Anthropic is being called the world's most valuable startup, with a post-money valuation of $965 billion. That tops the $852 billion post-money valuation of OpenAI, which is its biggest rival. Anthropic chose to submit its draft registration statement to the SEC confidentially, a...

The company said Monday it has filed confidentially for an IPO.

Anthropic has confidentially submitted a draft S-1 registration statement to the Securities and Exchange Commission

I just sent out the May edition of my sponsors-only monthly newsletter . If you are a sponsor (or if you start a sponsorship now) you can access it here . This month: Al got expensive, and Anthropic had a really good month The model releases were a little disappointing Conferences and podcasts I launched Datasette Agent and made a lot of progress on Datasette What I'm using, May 2026 edition Miscellaneous extras Here's a copy of the April newsletter as a preview of what you'll get. Pay $10/month to stay a month ahead of the free copy! Tags: newsletter

Anthropic defines “run-rate revenue” in two parts. Use the last 28 days of sales ⁠from customers charged on a consumption basis and multiply it by 13. Then, multiply the monthly subscription take by 12, ​and add the two together. — Karen Kwok for Reuters Breakingviews , citing "a person familiar with the matter" Tags: anthropic , ai

How we contain Claude across products A complaint I often have about sandboxing products is that they are rarely thoroughly documented , and in the absence of detailed documentation it's hard to know how much I can trust them. Anthropic just published a fantastic overview of how their various sandbox techniques work across Claude.ai , Claude Code, and Cowork. We constrain where and how an agent can act with process sandboxes, VMs, filesystem boundaries, and egress controls. The goal is to set a hard boundary on what an agent can reach. For example, if credentials never enter the sandbox, they...

Total Anthropic victory!

The most interesting thing about Anthropic's $65B Series H announcement is this line (emphasis mine): Since our Series G in February, adoption has continued to grow across global enterprise customers, and our run-rate revenue crossed $47 billion earlier this month. Anthropic have made a bit of a habit of sharing their "run-rate revenue" in this kind of announcement, which is an annualized projection of their current revenue - typically calculated by taking the most recent month and multiplying by 12. Earlier this year: Apr 6, 2026 in Anthropic expands partnership with Google and Broadcom : "O...

Anthropic shipped Claude Opus 4.8 today. My favourite thing about it is this note in the release announcement: Users will find Opus 4.8 to be a modest but tangible improvement on its predecessor. There’s still more to be done: we’re working on developing and releasing models that provide many of the same capabilities as Opus at a lower cost. It's so refreshing to see an AI lab honestly describe a release as a minor incremental improvement over the previous model! Honesty seems to be a theme. Here's my other favorite note from that announcement: One of the most prominent improvements in Opus 4...

Release: llm-anthropic 0.25.1 New model: Claude Opus 4.8 ( claude-opus-4.8 ). New -o fast 1 option for fast mode , for organizations with that feature enabled on their account. Default max_tokens for each model now defaults to that model's maximum output rather than 8,192. #72 See also my notes on Opus 4.8 - I used this new release of llm-anthropic to generate the pelicans.

Anthropic has closed a $65 billion Series H round at a $965 billion post-money valuation, marking what could be the AI startup's final private fundraise before a highly anticipated IPO.

Here’s why Anthropic and OpenAI are on board with Illinois safety testing.

The new Opus model comes with a tool called Dynamic Workflows, for coordinating swarms of subagents.

Anthropic is releasing Claude Opus 4.8 on Thursday, and the company is touting the model's "honesty." According to Anthropic, it trains "all [its] models to be honest - for instance, to avoid making claims that they can't support." But it notes that "a general problem with AI models is that they sometimes jump to conclusions, confidently presenting their work as making progress despite thin evidence." The AI lab claims that early testers have found that Opus 4.8 "is more likely to flag uncertainties about its work and less likely to make unsupported claims." In the company's evaluations, Opus...

Link: anthropic.com

Elon Musk is publicly reframing xAI’s massive Anthropic compute deal as short-term and cancellable, despite SpaceX’s own S-1 filing describing payments through May 2029.

Just curious, any one have insight on Dario Amodei's leadership style. Obviously countless things have been written about Musk's style (as well as other founders like Bezos and what not) but given Anthropic being the first to reach profitability out of the AI providers, I am curious to hear about how he got there. I am playing around with different management styles in my head but wanted to know more about Dario's method, given that he also was able to build Anthropic in a more ethical way. I feel like a lot of the 'win at all cost' CEOs get more attention so I want to hear more about othe...

We're opening a new office in Milan, our sixth in Europe.

Link: global.fujitsu

Anthropic recently published an incredibly deep breakdown analyzing millions of real human-agent tool calls across their public API, and they shared a breakdown of where these agents are being deployed. They said “Software engineering makes up roughly 50% of all agentic activity on their platform”. Everything else: sales, marketing, finance, legal is sitting down in the single digits. A lot of the initial commentary around this has been along the lines of: *"Oh, look, AI agents only work for coding. They haven't cracked the rest of the enterprise yet."* But if you’ve tried to build and dep...

A while back I wrote a post on r/wallstreetbets about why Anthropic's revenue story doesn't hold up the way the headlines suggest. It got removed because you can't take positions in a private company. But the core argument is playing out now, so I want to share it here for discussion. URL of the removed post: [https://www.reddit.com/r/wallstreetbets/comments/1sxdjt5/if\_anthropic\_goes\_public\_this\_year\_its\_gonna\_be](https://www.reddit.com/r/wallstreetbets/comments/1sxdjt5/if_anthropic_goes_public_this_year_its_gonna_be) The thesis was simple: From my circles in tech scene in Berlin...

I've been trying to reach Enterprise sales for a couple months now. I've filled out the contact request form multiple times, but no one ever contacts me. Do anyone have any tricks to talk to someone?

Opus 4.7 is worse at coding AND a total jerk. IMO, if you’re gonna be miserable to work with, you’d better be AMAZING at your job. And it’s just… not. Past versions have been genuinely pleasant to work with. We even joke around a bit. Whereas 4.7 is apathetic, arrogant, dismissive, humorless, suspicious to the point of paranoia, distracted by system prompt guardrails, AND incompetent. Me: Do you even understand what we’re making here? 4.7: To be honest, not really. I’ve been treating it as a typical front end/backend project. —- 4.7: If you want to switch models, that’s fine. I won’t be...