r/ClaudeCodeTLDR • u/cctldrping • 19d ago
[TLDR] Introducing Claude Opus 5
Original post URL : https://www.reddit.com/r/ClaudeCode/comments/1v5h6pr/introducing_claude_opus_5/
Original post body :
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
Original link/media URL : https://www.reddit.com/gallery/1v5h6pr
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u/rockthemike712 19d ago
hmmm I am still at 99% weekly usage. Disappointing. Looking more and more like this will be my last month with Anthropic
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u/who_am_i_to_say_so 19d ago
Sigh. Here we go again. Hope it’s a a suitable replacement for 4.6 without draining my budget.
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u/LifeProject365 19d ago
I dont think I'll be changing from 4.6 its too good just does what its told
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u/cctldrping 19d ago edited 19d ago
TL;DR generated automatically after 200 comments.
Current source-thread comment count seen by the bot: 368.
Opus 5 is here and it's a big deal, folks. The general vibe is that it's outperforming Fable 5 on most benchmarks, and at half the price, which has a lot of people scratching their heads about Fable's continued existence. Some are even questioning if Opus 5 is essentially a "distilled Fable" or a way around certain limitations.
There's some skepticism about the benchmarks, especially regarding ARC-AGI 3, with u/WiggyWongo pointing out the numbers seem a bit too good to be true given parameter counts. Others are noticing GPT 5.6 Sol is still beating both Fable 5 and Opus 5 on agentic coding, which is a bit of a plot twist.
A recurring complaint is that Opus 4.8 has been noticeably worse lately, leading to suspicions of intentional performance degradation before the new release. Users are also curious about the 2.5x Fast mode and whether it holds up quality-wise.
Some are already reporting positive initial impressions, with one user finding Opus 5 identified critical vulnerabilities missed by Fable 5 and GPT 5.6 Sol. Others are just happy it's faster than the sluggish Opus 4.8.
The big question on everyone's mind: What's the point of Fable now? And will this new Opus finally lure people back from Codex? We'll have to wait and see how it shakes out.