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Posted by saikatsg 4 hours ago

Getting the most out of Opus 5.5 in Claude and Claude Code(claude.dev)
92 points | 50 commentspage 2
danbrooks 1 hour ago|
Agreed on Opus 5.5 being a great model. It's the first one that I trust for long running (>1 hour) tasks.
jester997 1 hour ago||
It’s amazing at debugging too. I had it running in Powershell controlling an lldb session in MSYS2. The way it can read addresses and so root cause analysis is amazing! It takes a lot of mind power to do those things.

I like to watch it work though because it honestly teaches me some tricks.

whatsThisBtn4 1 hour ago||
I'm convinced gpt 4.5 was the best model humanity has ever made.

Now we are getting downgraded models that do 100x COT because it's cheaper.

tebrun 1 hour ago||
Opus 5.5 is great and cheaper if you compare to fable with close quality in coding (tested in refactoring java to nodejs), but I do not understand why the week before the release Opus 5 started hallucinating (long loop and waste of token for single tasks)
sergiotapia 1 hour ago||
The best model I've ever used easily. It's incredible. I've done so much in the past week. About three months of work I reckon.
icedchai 19 minutes ago||
Same. I was asked to rebuild an app with AI as an experiment. The original app took months and Opus 5.5 rebuilt it in less than a week.
OtomotO 32 minutes ago||
Did you get paid the amount of three months?

It not: who becomes rich on all that productivity?

Handy-Man 2 hours ago||
Phenomenal model, not sure what they did, but I have been able to do so much with my $20 plan!
amelius 1 hour ago||
I think what makes it great is that they trained it to write harnesses for the code it writes, so it can test stuff even if the supplied code is not complete.
verdverm 39 minutes ago|||
the open weight models I've been using have been doing that for months, not sure it's a new pattern in the opus 5.5, or maybe they distilled it back? :x
yfontana 1 hour ago|||
A significant part of it is that with Opus 5.5, cache reads are priced at 5% of inputs, instead of 10% for previous models.
233mhz 2 hours ago||
If enough people keep saying it I'm sure they will nerf it
franze 2 hours ago||
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i_love_retros 2 hours ago|
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