Looks similar
Claude 4 System Card(simonwillison.net)
638 points by pvg | 237 comments
Simon Willison's blog post highlighting notable details from Anthropic's 120-page system card for Claude Opus 4 and Claude Sonnet 4.
Watching o3 guess a photo's location is surreal, dystopian and entertaining(simonwillison.net)
919 points by simonw | 405 comments
Simon Willison blog post describing how OpenAI's o3 model guesses where a photo was taken, testing it on a photo from El Granada, California.






