Ask HN: Is Opus 5.5 another step change?

11 pointsposted a day ago
by consumer451

Item id: 49850798

14 Comments

A_D_E_P_T

21 hours ago

Yes, Opus 5.5 and Astra-6 are big improvements over Opus 5 and Sol-5.6. I'm at a point where I can automate much of my workflow, even for complicated tasks, which I could never do before.

Also the new Xiaomi model, Mimo v2.6, is outstanding as a light and cheap model. For coding, the new meta is using Astra-6-Max for orchestration and architecture, and Mimo for grunt work.

jryan49

8 hours ago

I have Opus 5.5 running subagents for the last 20h without any input from me after developing a plan and it seems to be going well somehow... but I will find out soon...

MoneyLovesSpeed

6 hours ago

20h with no input is insane

at that point the hard part is just trusting it didnt quietly go off track somewhere imo

jryan49

3 hours ago

I've been checking it and it's doing great I'm sure there are some bugs but it's doing a huge bulk of tedious simulation logic for my game. I was previous in the loop quite a bit but I found myself never having to redirect it so I tried the here a giant plan /loop until its done

KellyCriterion

7 hours ago

First of all, I consider it very expensive, somehow in the range of Fable:

I activated Opus 5.5 when the invitation popup showed up, and Im already paying as a pro-user - nontheless the usage of Opus 5.5 charged massivly additional on the last few days, around 12-13 USD per day.

Im still fine with Opus 4.6 or 4.8 for daily development.

nr378

20 hours ago

Yep, I'm personally finding Opus 5.5 to be the first real leap I've felt since Opus 4.5. The time-to-first-token seems dramatically better in Claude Code compared to Fable 5.1/Opus 5 as well, which really helps both interactivity and also overall time-to-completion.

It also burns Claude subscription quota much more slowly than Fable, which is nice.

tkgally

19 hours ago

I’m also finding Opus 5.5 to be a significant advance. In the past few days, I’ve given it several complex tasks related to two long-term dictionary-building projects [1, 2], and it handled them impressively—similar to Fable but with much lower token consumption. It also communicates better than Opus 5.1; I don’t think I’ve seen any obvious Claudisms yet.

[1] https://www.tkgje.jp/

[2] https://tkgally.github.io/eex-dict/index.html

JojoFatsani

17 hours ago

I just love that it knows how to form its thoughts into meaningful statements without rambling again.

sznio

14 hours ago

It's the first model that I feel I can just use freely without crashing into the 5 hour limits. I just manage to get my work done and still have tokens left over

brianwawok

19 hours ago

Feels like a faster and cheaper fable, which yes is a big jump.

smnplk

20 hours ago

yea, apparently you dont need to know Rust

grim_io

20 hours ago

It's less shit, so that's good I think.

moomoo11

6 hours ago

astra on ultra still blows it out of the water

m4rtink

20 hours ago

No. Next question ?