Claude Opus 5.5 Should Raise Your Ambitions

Claude Opus 5: The System Card

Claude Opus 5 is trying to be the best of both worlds.

you can just do stuff

arpa and xerox parc, agency, stoicism, a set of guidelines for ambitious endeavors

‘Find Your Passion’ Is Awful Advice

A major new study questions the common wisdom about how we should choose our careers.

Why ‘Follow Your Passion’ Is the World’s Worst Career Advice

The popular "follow your passion" advice has become an overused and generic phrase. Below is another method that may just do the trick in helping people's careers.

Introducing Claude Opus 5

Opus 5 is a step change improvement for the Opus tier powering long-running agents while delivering improvements in coding and professional work.

Introducing Claude Opus 5.5

Claude Opus 5.5 leads in agentic coding and knowledge work, and costs 40% less to run than Opus 5 on typical workloads.

Claude Fable 5 and Claude Mythos 5

Today we’re launching Claude Fable 5: a Mythos-class model that we’ve made safe for general use.

Claude Opus 5 Is Highly Capable, But Is No Mythos

Claude Opus 5 is a weirder than usual release to evaluate, for two reasons.

Claude Fable is relentlessly proactive

After two days of experience with Claude Fable 5 I think the best way to describe it is relentlessly proactive. It knows a whole lot of tricks and it will …

Introducing Claude Opus 4.6

Claude Code, Claude Cowork and Codex #5

It feels good to get back to some of the fun stuff.

Leveling Up: Career Advancement for Software Developers | Peter Lyons

Staff Engineer, Back End

A field guide to Claude Fable 5: Finding your unknowns | Claude | Claude by Anthropic

Practical patterns for agentic coding with Claude Fable: how to find your unknowns before, during, and after implementation, from the team at Anthropic.

The School for Moral Ambition

Moral ambition redefines success: not by what we accumulate, but by what we contribute. Build a legacy that truly matters. Join the movement.

Prompting Claude Opus 5

Behavioral differences and prompting patterns for Claude Opus 5, covering response verbosity, agentic narration, task scoping, subagent delegation, self-correction, and output artifacts when thinking is disabled.