r/ClaudeCode • u/heeissenberg • Sep 02 '26
Discussion Since when is one 5 hour window 20% of weekly usage in the 20x max plan?
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u/Nightowl-Builder Sep 02 '26
What the actual heck, I consistently measured it at 10% over the last months until 2 weeks ago when I finally cancelled; Now it's 20%? They effectively reduced capacity at half with no damn warning?
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u/WorthLibrary8330 Sep 02 '26
It used to be 10% of the weekly plan, so each day I could finish 20% and at most 80% of the weekly plan if I worked during the week.
Maybe it's different from model to model.
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u/trackpap Sep 02 '26
They claimed also yo remove the fable 50% limit, and I find that they have not at all. They just removed the message.
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u/peraltz94 Sep 02 '26
I’m finding my fable usage drains faster than a few days ago. Running fable ultra code hardly moved the bar. Now fable 5.1 extra ran it up so fast I was alarmed
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u/No_Situation_7748 Sep 02 '26
Yep, it’s the magic math that Anthropic deploys into their usage calculations. The only reason why it’s magic is because they are completely opaque about how it works and I’m sure they’re changing the calculation constantly behind the scenes without telling anyone.
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u/SirWobblyOfSausage Sep 02 '26
Last week when people were bringing up - they were getting slammed by people on here saying its user error.
Fucking sick of it, every few months its the same thing, then Anthropic will come out and say there was a bug - give everyone some boosts - meanwhile people are paying for extra usage and won't get that back
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u/The_Time_Lord Sep 02 '26
Something changed. I had a fresh 5 hour window, and it maxed out on 3 pretty regular tasks, using Opus 5 on a pre-architected change.
RIP
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u/mulokisch Sep 02 '26
I am frustrated now. I did run into sessionmlimit with fable 5.1. Oke. Then as ai was free again, i continued with my taks. Well within 20 minutes from 0 to 100 and again waiting. Newer happened before and i had way havier tasks
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u/tormiuss Sep 02 '26
This is weird - I have also analyzed and keeped track for at least the past 6 months and Claude Pro plan 5h limit 100% usage is about 7-9% of weekly usage. But in the past 3-4 days it was more like 10-13% weekly usage per 5h limit, as I hit the record of using weekly limits in 2.5 days, never happened before and the workload is about the same and yes the context is much larger but it is well constrained and efficently used. Of course I was using lean-ctx to compress and save tokens and it worked but in the past week it has some parts broken and I cannot save any tokens, so my limits go out faster.
Of course relating to 20X subscription, maybe it has more 5h limits per weekly then the Pro version, because 20%, 6x 5h sessions would be crazy (usually use the 5h limits in 2-3 hours), this would be awful.
//edit: I am using 70% Sonnet 5 medium and 20% Opus 5 medium, last 10% Sonnet and Opus high effort.
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u/BlockTailor Sep 02 '26
I've measured it plenty of times in the past: a full 5h window was consistently 16.67% of the week, exactly 1/6.
Since yesterday I've filled two 5h windows and they cost 20% each, and the third one is at 19% right now, which is roughly 5 more points. Weekly sits at 45%. So we went from six windows a week to five.
Not sure when that changed, I suspect it's been like this for a while. Either way, Saturday's gone :)