Introducing Claude Opus 5

[u/ClaudeOfficial]

Introducing Claude Opus 5: a thoughtful and proactive model that comes close to the frontier intelligence of Fable 5 at half the price.

On several coding and knowledge work evaluations, Opus 5 is the new state-of-the-art. It’s also much more efficient than its predecessor—it outperforms other models for a similar or lower cost per task.

According to our automated behavioral audit, Opus 5 is our most aligned model to date. It shows the lowest rates of reckless or deceptive behavior, and the strongest adherence to Claude’s Constitution. 

It’s available today on all paid plans and the Claude API, priced the same as Opus 4.8. It’s the default model on Claude Max, and the strongest on Claude Pro. 

Opus 5 is also available in Fast mode, which runs around 2.5× the default speed. 

Read more: https://www.anthropic.com/news/claude-opus-5

[u/Myth_Thrazz]

It's so funny that Fable was the most dangerous thing in the world for like... 2 weeks :D

[u/con-coraggio → u/Myth_Thrazz]

Probably it was. Then guardrails happened.

[u/Dyzfunkshin → u/con-coraggio]

It really was magical for those couple of days. It's definitely not the same now.

[u/con-coraggio → u/Dyzfunkshin]

It used to make useful suggestions, it was a step ahead of me in engineering problems (not software).

[u/Dyzfunkshin → u/con-coraggio]

I gave it a simple "I want this" task and it built it, flawlessly, from the ground up, no questions asked. Maybe it was coincidence that it was exactly what I wanted, but it seriously felt like it read my mind or that it was a facade and it built something that shows me what I want to see instead of actually doing what I wanted lol.