Claude Sonnet 5

#1

Post by marinesebastian » Tue, Jun 30, 2026, 5:59 PM UTC

Re: Claude Sonnet 5

#2

Post by tensegrist » Tue, Jun 30, 2026, 6:01 PM UTC

there was a vibecoded prediction market–style page that was put up yesterday (?) that got the date exactly right i think

Re: Claude Sonnet 5

#3

Post by rib3ye » Tue, Jun 30, 2026, 6:01 PM UTC

tensegrist wrote: post #2

there was a vibecoded prediction market–style page that was put up yesterday (?) that got the date exactly right i think

link?

Re: Claude Sonnet 5

#4

Post by mag7269 » Tue, Jun 30, 2026, 6:02 PM UTC

When can we get a new Haiku? 4.5 came out nearly a year ago, and it's showing its age.

Re: Claude Sonnet 5

#5

Post by [deleted] » Tue, Jun 30, 2026, 6:02 PM UTC

[deleted]

Re: Claude Sonnet 5

#6

Post by chipgap98 » Tue, Jun 30, 2026, 6:03 PM UTC

Interesting that tasks on extra high cost almost the same as Opus 4.8 with a slightly worse performance

Re: Claude Sonnet 5

#7

Post by babelfish » Tue, Jun 30, 2026, 6:03 PM UTC

System Card: https://www-cdn.anthropic.com/d9bb04416ffe1352af84721476c1fa...

Re: Claude Sonnet 5

#8

Post by tokengod » Tue, Jun 30, 2026, 6:05 PM UTC

That’s nice, but we want Fable

Re: Claude Sonnet 5

#9

Post by bredren » Tue, Jun 30, 2026, 6:05 PM UTC

chipgap98 wrote: post #6

Interesting that tasks on extra high cost almost the same as Opus 4.8 with a slightly worse performance

This is on the browsercomp graph, right?

In that, it seems sonnet 5 on high costs more than opus 4.8 at a lower pass rate. Am I reading this correctly?

Edit: It looks like the key value proposition of the updated model is that it is much better than Sonnet 4.6.

Wheras, Sonnet 5 delivers great value (by browsercomp benchmarks and compared to opus) when running in low and medium.

So: Sonnet 4.6 should ~never have been run for low, medium or high when Opus 4.8 has been available. Whoops, I think I have some skills that delegate easy stuff to Sonnet.

---

I remember Anthropic pivoting everyone's default model to Opus but had not seen it put so starkly before.

I am a bit confused on the subscription `/usage` screen. It splits out sonnet usage, and I'd presumed that would have contributed to a lower use of subscription Quota.

But if this is correct, Sonnet usage was basically like smoking unfiltered cigarettes.

Re: Claude Sonnet 5

#10

Post by andai » Tue, Jun 30, 2026, 6:06 PM UTC

Opus 4.8 beats Sonnet 5 on the pareto frontier in several of their graphs (Agentic Search, Agentic Computer Use).

In other words, for certain tasks, Opus 4.8 is cheaper than Sonnet 5, and does better than Sonnet 5.

I've noticed this pattern on a lot of benchmarks. You can try to emulate a bigger model by ramping up the test time compute (max reasoning, more turns, model fusion etc.), but you can't reach the same quality level, and you often exceed the cost you would have paid by just using a bigger model.

tldr: if you're doing something hard, just use a bigger model.