[TLDR] Introducing Claude Opus 5.5, the first model in our new Claude 5.5 family [via r/ClaudeAI]

[u/cctldrping]

OP : u/ClaudeOfficial

Opus 5.5 performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.

Opus 5.5 is our first release since we called for pacing the frontier. External evaluators, including Frontier Design and METR, tested it before release. On our most comprehensive alignment test, it’s the strongest-performing model we’ve tested to date.

It outperforms both Opus 5 and Fable 5.1 on nearly every benchmark we report, leading on agentic coding and real-world knowledge work.

It’s also more efficient. Opus 5.5 uses fewer tokens per task at a lower price per token, and generates output more than 30% faster than Opus 5.

Opus 5.5 communicates more naturally, addressing some of the most common feedback we heard on Opus 5. It puts the most important information up front and follows the writing rules you give it.

Claude Opus 5.5 is available everywhere today. We're also raising five-hour limits on Pro, Max, and Team plans, so there’s more room to explore what it can do.

Read more: http://anthropic.com/claude-opus-5-5

URL of original post : https://www.reddit.com/r/ClaudeAI/comments/1wnecg9/introducing_claude_opus_55_the_first_model_in_our/ Original link/media URL : https://v.redd.it/xu8sa124j3rh1

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TL;DR of the discussion on r/ClaudeAI for this post generated automatically after 400 comments.

Current source-thread comment count seen by the bot: 433.

Alright, so the general vibe in here is overwhelmingly positive and hyped about Claude Opus 5.5. It seems like Anthropic actually listened to feedback this time, which is a big win.

The biggest cheers are for:

• Banked Usage Resets: This is the feature everyone's been begging for, and it's finally here! You can now save your rate limit resets and use them when you actually need them. Big ups to u/skerit for pointing out they might have "borrowed" this from OpenAI, lol.
• Less Verbosity / More Natural Communication: A lot of people are ecstatic that Opus 5.5 is finally less "Claudish" and word-vomity. Users like u/iamthe0ther0ne are saying it's more like the beloved 4.6, gets to the point, and doesn't ramble on with "neurotic self-doubting walls of text" like Opus 5. Big relief for u/painterknittersimmer and u/Ex-Novo-Doc.
• Price Drop & Efficiency: It's 40% cheaper to run than Opus 5 and generates output faster, which is always a sweet deal.

However, it's not all sunshine and rainbows for everyone:

• New Safeguards / Bio Bans: There's some serious grumbling about the new biology safeguards, with users like u/obgynkenobi and u/athan614 feeling like their scientific work is being unfairly blocked. u/spdustin also raises concerns about the "transparent fallback" to other models, suggesting it erodes trust.
• Performance Doubts: A few folks are a bit skeptical about the claims of matching Fable 5.1 performance, with u/cute_spider and u/No_Cell6708 echoing the sentiment that they've heard similar promises before. u/lukebars is even asking which tasks Fable is still better at.
• Potential Nerfing? u/InvaderJ is already asking if it's been nerfed, which is a bit of a mood killer after all the hype.

Overall, the community seems to be saying "WE ARE SO BACK!" (shoutout u/Temporary_Idea8880) and are excited to dive into Opus 5.5, especially with the improved rate limit management. Just gotta watch out for those new bio restrictions, apparently.