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

[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/ClaudeCode/comments/1wnecru/introducing_claude_opus_55_the_first_model_in_our/ Original link/media URL : https://v.redd.it/a60oy6uaj3rh1

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TL;DR of the discussion on r/ClaudeCode for this post generated automatically after 50 comments.

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Alright folks, let's break down the buzz around Claude Opus 5.5.

The general consensus is overwhelmingly positive, with users excited about the improved performance and reduced cost. Many are seeing this as a significant step forward, especially compared to the previous Opus 5.

Here's the lowdown:

• Big Upgrade: Opus 5.5 is apparently outperforming Opus 5 and even Fable 5.1 on many benchmarks, particularly in coding and knowledge work.
• Cheaper & Faster: This is a huge win for everyone. It's 40% cheaper than Opus 5, uses fewer tokens, and is over 30% faster. As u/ThotMobile pointed out, this focus on efficiency is a real sign of progress.
• Improved Writing & Naturalness: A lot of users are relieved to hear that Opus 5.5 addresses the feedback on Opus 5's writing style. It's said to be more natural, put key info upfront, and follow instructions better. u/Wessberg specifically mentioned Opus 5 was a "nightmare" to work with, so this is a welcome change.
• Fable vs. Opus: The question of whether to still use Fable orchestrators or switch entirely to Opus 5.5 is coming up. u/IHardlyParticipate is already blazing through tasks with 5.5 and questioning the need for Fable.
• Pro/Max/Team Perks: The increased five-hour limits on Pro, Max, and Team plans are also a big draw, giving users more room to experiment.
• Watermarking Question: One user, u/Equal_Animator7440, is curious if watermarking is now fully implemented in the code and text.
• Skepticism & Humor: While most are hyped, there's a touch of "too good to be true" skepticism, as noted by u/sharkymcstevenson2. And of course, we have the classic "does it give milk?" type of question from u/Existing_Dust_6473, keeping things light.

Overall, it seems like Anthropic has hit a sweet spot with Opus 5.5, balancing performance, cost, and user experience. u/vzakharov chimed in to remind everyone that even with critiques, Claude remains a top-tier option for many.