Member of Technical Staff @AnthropicAI // prev. @Neo 22’ // @8vc fellow
Joined May 2019
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Isaac Fung retweeted
Claude has discovered a previously unknown enzyme system hidden in the DNA of bacteriophages. Beside the enzyme’s gene sits a long array of repeating DNA—a structure that looks somewhat similar to CRISPR.
We don’t yet understand what this system does, but only a handful of known systems share its features, and all of them are able to cut, copy, and paste DNA. Historically, the discovery of such programmable systems has helped revolutionize medicine. CRISPR, for instance, is now the foundation of genetic medicines. But it will take much more work to learn what this system does, and whether it can be put to similar use.
Read more: anthropic.com/news/claude-di…
Isaac Fung retweeted
We Must Pace the Frontier: I’ve written a new essay on why the AI industry should slow down, with a three-part plan for doing so.
Anthropic is unilaterally committing to the first of these steps. We’ll provide third-party evaluators with permanent, employee-level access to our systems, so that they can verify adherence to our safety measures, report on incidents, and assess models’ alignment during training.
You can read the full post here: darioamodei.com/post/we-must…
Isaac Fung retweeted
We're publishing our most detailed threat intelligence report to date.
It covers how people tried to misuse Claude—for cyberattacks, influence operations, surveillance, biology, and building weapons—and how we found and stopped them.
We disrupted every operation in the report, and used the lessons from them to strengthen our safeguards. Where appropriate, we also shared what we found with authorities and other AI companies.
These cases are not typical: we’re highlighting some of the most sophisticated misuse we’ve seen. But they’re especially important to discuss, because they show us where AI misuse is headed, where our safeguards work, and where they need to improve.
We’re publishing this report so others can spot the same activity on their own platforms, and so we can give the public a clearer view of how emerging threats develop.
Read the report: anthropic.com/threat-intelli…
Isaac Fung retweeted
Starting August 14, auto mode will be the default permission mode in Claude Code for Pro, Max, and Team users.
Auto mode reviews shell commands and actions with a separate classifier. In testing, it caught 89% of dangerous commands. Manual approval caught 14%.
Isaac Fung retweeted
New Anthropic research: A global workspace in language models.
Of everything happening in your brain right now, only a tiny fraction is consciously accessible—thoughts you can describe, hold in mind, and reason with.
We found a strikingly similar divide inside Claude.
Isaac Fung retweeted
We’re hosting a poker tournament with 24 top players from @cognition, @cursor_ai, @perplexity_ai, @anthropicAI, @thinkymachines, @midjourney, @tryramp, @xAI, @openevidence and more.
No buy-in. Big prizes. Live sushi chef, open bar, in a secret SF venue that’s never been open to the public.
Each company is sending 1 to 2 players to the table to see who can win it all.
We’ve reserved a small number of spectator spots. Register below for a chance to attend or tag someone who should be in the room.
Isaac Fung retweeted
We're hosting a sick poker tourney with 24 top players from @cognition, @cursor_ai, @perplexity_ai, @anthropicAI, @thinkymachines, @midjourney, @tryramp, @xAI, @openevidence, @DecagonAI, etc
1 player repping each company.
Prizes, live sushi chef, limited viewing spots, RSVP 👇
Isaac Fung retweeted
Introducing Claude Opus 4.7, our most capable Opus model yet.
It handles long-running tasks with more rigor, follows instructions more precisely, and verifies its own outputs before reporting back.
You can hand off your hardest work with less supervision.
ALT Claude Opus 4.7 Benchmarks
Isaac Fung retweeted
Wrote this in February as a half-serious toned but information theoretically sound outlook on why quantum computers are so good at breaking crypto. Coincidentally, big cos are now making me right. Recent work from Deepmind and NVIDIA only accelerates this
seunomonije.com/?work=ai-qua…
Isaac Fung retweeted
Introducing Project Glasswing: an urgent initiative to help secure the world’s most critical software.
It’s powered by our newest frontier model, Claude Mythos Preview, which can find software vulnerabilities better than all but the most skilled humans.
anthropic.com/glasswing
Isaac Fung retweeted
Claude Code's p99 memory usage dropped by 40x in the last two weeks, and by 6x since January - while growing rapidly & continuing to ship tons of new features.
ALT Claude Code P99 RAM Usage chart showing a 40× reduction in memory. The graph tracks RAM from January 16 to February 24. It starts at 10.2 GB on version 2.1.9, climbs through several peaks in the 20–35 GB range, spikes to a peak of 68.2 GB around February 13 (version 2.1.42), then drops sharply to 1.7 GB by February 24 on version 2.1.52.
Isaac Fung retweeted
We’ve identified industrial-scale distillation attacks on our models by DeepSeek, Moonshot AI, and MiniMax.
These labs created over 24,000 fraudulent accounts and generated over 16 million exchanges with Claude, extracting its capabilities to train and improve their own models.
Isaac Fung retweeted
Our run-rate revenue is $14 billion, and has grown over 10x in each of the past 3 years. This growth has been driven by our position as the intelligence platform of choice for enterprises and developers.
Read more: anthropic.com/news/anthropic…
Isaac Fung retweeted
We’ve raised $30B in funding at a $380B post-money valuation.
This investment will help us deepen our research, continue to innovate in products, and ensure we have the resources to power our infrastructure expansion as we make Claude available everywhere our customers are.
Isaac Fung retweeted
We're committing to cover electricity price increases from our data centers.
To ensure ratepayers aren’t picking up the tab, we'll pay 100% of grid upgrade costs, work to bring new power online, and invest in systems to reduce grid strain.
Read more: anthropic.com/news/covering-…
Isaac Fung retweeted
Opus 4.6 is state-of-the-art on several evaluations including agentic coding, multi-discipline reasoning, knowledge work, and agentic search.
We're also shipping new features across Claude in Excel, Claude in PowerPoint, Claude Code, and our API to let Opus 4.6 do even more.
ALT Benchmark comparison table showing Claude Opus 4.6 leading or matching top scores across 15 evaluations — including agentic coding, tool use, reasoning, and search — against Opus 4.5, Sonnet 4.5, Gemini 3 Pro, and GPT-5.2.