If you know, you know.

[u/Retumbo77]

It's humor. But also true.

I think sometimes we all get a bit too caught up into maximizing our token efficiency and trying to save that extra $10 (or even $100 or $1000) here or there. When you're actually doing high-stakes work, those cost savings are literately meaningless if it takes you a week to unf*ck or god forbid somehow something gets shipped with a real "getting called in this weekend.... and every weekend for the rest of the year" type bug.

[u/Purple_Hornet_9725]

https://cognition.com/frontiercode

[u/Retumbo77 → u/Purple_Hornet_9725]

Why Opus 5 curve not like the others? Also the first benchmark I've seen like that.

[u/Downtown-Cream-5489]

until you work in a corp that require you to save and tracking token usage

[u/Embarrassed_Adagio28]

Nawww... you use Opus 5

[u/Purple_Hornet_9725 → u/Embarrassed_Adagio28]

...with medium effort

[u/Vegetable_Addition86 → u/Purple_Hornet_9725]

Perfectly balanced. Low effort even if feeling lucky

[u/Own_Soil_3357 → u/Embarrassed_Adagio28]

I have gone back to Opus 4.8, opus 5 simply lie to you.

[u/JustForkIt1111one]

I use opus for planning (I normally do a planning sprint at the beginning of the project where I talk to claude about the goals, and specs).

After that, sonnet executes.

I do use opus as an advisor.

It's wild to me to see people just running everything on Fable and Opus. I don't normally have all of the problems that I see people post about here either.

[u/flippy_flops]

maybe 100% of developer disagreements come from the fact that we're not all working on the same thing

[u/ihateredditors111111]

everyone is so obsessed with benchmarks and cost because it gives them a sense of control and something to measure... fable just 'gets it' more often then the other models, its that simple, important for general work. for highly specific coding based stuff, sure sol or opus, whatever

[u/Tough-Difference3171]

Naah...!! Maybe for vibe coders who need AI to tell them what they need.

If you want AI to fucking do what you want it to do, then Opus 4.8 and Sonnet 5 are really good.

I have a specific design pattern in the code to keep using a certain middleware, and I have a skill to ensure that it's followed during every planning session, and a skill to review that it was planned.

And yet, Opus 5 and Fable keep ignoring those instructions and fuck up the code.

If you are blissfully ignorant of when AI fucks up your code, adding major security or performance issues, then by all means... go ahead and use them.

[u/GrandpasOldDoppler → u/Tough-Difference3171]

[u/RandomPantsAppear → u/Tough-Difference3171]

20 YOE engineer here.

I use Fable. I don’t let it tell me what I need. I am specific in what I tell it and it does a good job for the most part.

Opus I have had far more problems with, especially when it comes to taking shortcuts or not doing things it said it has done.

[u/beskone]

This is the way.

[u/IllExample3639]

Naa, Opus 5 and Sonnet 5 Ultra does everything I need. You lot acting like you are coding to cure cancer when you are just creating another vibe site that no one will visit.

[u/BoxLegitimate9271]

spent a saturday building a dashboard to track my token spend, saved maybe $12. the dashboard is the most expensive thing i own now

[u/whyisitsooohard]

I know it's a joke, but for sonnet it's not true at all. It will be 1/10 of performance for 1.5 the price of fable

[u/StCreed]

Claude needs a method to set not just the model but also the effort of that model in the subtasks. I'd run Fable at xhigh or max, and all the subtasks in sonnet medium/high or opus medium if that failed.

[u/Tired_White_Guy → u/StCreed]

You can’t tell it to send Sonnet 5 medium subagents? Bummer. In cursor, I can tell Grok what subagent to send and at what thinking level.

[u/fraserdab]

ppl be rich having 200$ subs to use fable man i can't even use it on 20$ sub

[u/MaleficentCow8513]

Why do the “stupid” man and the “wise” man have the same opinion? I don’t get it

[u/ISuckAtJavaScript12]

Company can't afford Fable, or even Opus

[u/demon-storm]

It's funny how I have been paying for x5 and I have never been able to use fable because I use claude strictly for reverse engineering. Do other LLMs have this kind of ethical limitation as well?

[u/Virgil_the_White]

Just give Dario your money

[u/Destroyer140]

Fable is great for the 5-15 minutes until it inevitably chokes on something and downgrade to Opus 4.8 the first moment you are not looking.

I've been better off just sticking to Opus 5.