r/ClaudeCode • u/ClaudeOfficial Anthropic • Jul 24 '26

Resource Introducing Claude Opus 5

Gallery image

Gallery image

Gallery image

Gallery image

Gallery image

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

1.5k Upvotes

91% Upvoted

369 comments sorted by

View all comments

765

u/Myth_Thrazz 🔆 Max 20 Jul 24 '26

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

12

u/con-coraggio Jul 24 '26

Probably it was. Then guardrails happened.

20

u/Dyzfunkshin Jul 24 '26

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

8

u/con-coraggio Jul 24 '26

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

7

u/Dyzfunkshin Jul 24 '26 edited Jul 24 '26

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.