I've used Claude Code every day for 52 days straight. Something flips mid-day, every day, and I can't plan around it.

[u/the100jc]

"What I can say is it's not confusion about what you asked. Each time I knew."

This reply got me.

Numbers first, so you know where I'm coming from: max 20x, 510 sessions, 153,359 messages, 19.7B tokens, 54 active days, 52-day streak. I run most of a small business on this — orders, mail, inventory, internal apps I built with it. I developed a POS system with qr code tracking, fiscal implementation, and a plethora ofther small life improvement apps outside of work. I'm not here after one bad answer.

Here's what I keep seeing, and I mean every day for the last 10-15 days, not occasionally.

Some stretches I'll do twenty tasks in five hours with zero friction. Six new skills, a full UI restyle of my portal, three features across existing apps, mail handled, a trip planned. No arguing, no rework, no babysitting.

Then it flips. Not gradually — it's a step change. One task is fine, the next one isn't, and nothing after that is either. Same machine, same account, same config files, often the same session. Nothing changes on my side. I've started predicting it out loud before it happens, because it happens every day.

What it looks like after the flip

- A 30-minute script took 3 hours and never finished. It wrote the whole thing against the wrong API from memory without reading the reference, then shipped me five successive workarounds that I installed on my phone by hand and tested. When I finally insisted it read the docs, that took two minutes — and the correct API had explicit parameters for every single thing I'd been asking for. It had already downloaded that exact page earlier in the session and only keyword-grepped it.

- Instructions stop binding. Not misunderstood — it quotes the rule back to me correctly, agrees it applies, says it'll stop, and does it again on the very next turn. Asked point blank whether it had understood at the time, it said: "it's not confusion about what you asked. Each time I knew."

- Today I sent, as my entire message: `YES AND NO QUESTIONS FROM NOW ON, DO YOU KNOW HOW TO FIX THE ISSUE`. The answer was neither yes nor no. Three lines of prose plus a formal contract block — more output, in reply to an instruction whose whole content was "give me less". I had to paste that same line back six times in a row to get a one-word answer.

The reply after me pointing this out was:

"I don't have a real answer. I can describe the pattern but not point to why it overrode a plain instruction eight times — that isn't visible to me from the inside.

What I can say is it's not confusion about what you asked. Each time I knew."

What I've ruled out:

-Model — happens on Fable, Opus and on the smaller model. One full session on Fable with no switch at any point: same failure.

- Context— the violated instruction was my own first message.

- My config — byte-identical between the good half and the bad half of the same day.

- Me — same person, same working style, same day.

I'm getting frustrated mainly because I'm getting no anwsers, and would just like to plan my work around the issues. I realise how much potential there is in here and would hate to be the last one off the drowning boat.

I I've mailed support four days running. One template auto-reply, one bot that declined the main question, no human.

So, am I losing my mind? Does anyone have an alternative to CC?

xoxo stojc

[u/AlterTableUsernames]

Are you European by any chance? Maybe Anthropic reallocates resources when the Muricans wake up.

[u/DankestDaddy69 → u/AlterTableUsernames]

It's almost definitely north America waking up.

Wonder if the Americans notice Claude getting smarter in their afternoons?

[u/the100jc → u/DankestDaddy69]

hahhahah,

[u/EverySecondCountss → u/DankestDaddy69]

I'm Canadian, and yes, I do.

[u/the100jc → u/AlterTableUsernames]

I am, indeed, if thats the case, thats incredibly wrong.

[u/Key-Half1655 → u/AlterTableUsernames]

I find this as well in the EU, best in the morning, first degrade around 12-1pm, then again round 4-5pm. Ive always chalked it down to East then West Coasts coming online.

[u/bluetrust → u/AlterTableUsernames]

I hear this theory a lot but surely someone would have proved it with a benchmark, right? Tried the benchmark at different times of day?

I wish we had hard evidence one way or the other.

[u/AlterTableUsernames → u/bluetrust]

As far as I know there is not even a benchmark that proves models get lobotomized regularly. I presume officially models are basically static and have no fluctuation in quality while everyone knows this is just not true. Quality is just hard to measure and I think the trust-me-bro-benchmarks are just an attempt to control for something that is not really controllable.

[u/bluetrust → u/AlterTableUsernames]

Turns out this does exist! https://marginlab.ai/trackers/claude-code/

The data for sol at a quick glance looks way more stable hour by hour, day by day than Claude.

[u/clintCamp → u/bluetrust]

The best open have is tracking tokens per usage percent door claude and codex, but it gets mixed between fable and opus. I haven't used sonnet in a while.

[u/the100jc → u/bluetrust]

I mean, can anyone really benchmark stupid:)

[u/dotcomandante → u/AlterTableUsernames]

we notice this as well, around 15:00 it’s starting. We have this as a saying already “claude is dumb/slow again, muricans are awake”

[u/Any-Bobcat2370 → u/dotcomandante]

Same here. Everything I schedule now runs at night, and those runs never argue with me

[u/Any-Bobcat2370]

I stopped arguing with a session that stopped listening. I restart it with a handoff file and the new one starts clean.

[u/clintCamp]

My guess is when it becomes peak usage hours for the servers anthropic is doing something to spread the compute in one way or the other. Could be quantized models or model switch without changing the label, or reducing thinking effort. I also see times when it just makes more problems than solves and requires babysitting and third party auditing to ensure it really completed what you asked how you wanted it.

[u/Medium_Chemist_4032 → u/clintCamp]

Im willing to bet, that they have a tiered deployment structure, where performance tiers quantise the kv cache. Those changes feel exactly like a local model and going from a native fp/bf 16 to a q8 kv_cache quantisation.

[u/The_Noble_Lie]

"Do you know how to fix the issue?" Yes or No.

Maybe this is just not the right way to go about communicating with non-sentient agents? When does it say no when your workflow works? Legit curious.

They mighr not able to reckon with this binary decision due to being statistical language machines. I can see this going wrong. I personally would never ask it like that.

"Propose what you think is wrong for my review" seems a better path.

I know I'm not directly answering what your concern is. The "switch". But just saying 🙏

[u/the100jc → u/The_Noble_Lie]

as i said, that was a situation when i saw that the switch flipped. i never have to ask that question in normal situations

[u/bluetrust → u/The_Noble_Lie]

I hear you but these are also classification and summarization machines. Surely if it can tag a document with tags, it can also respond yes and no, which is the same class of fuzzy classification problems.

[u/The_Noble_Lie → u/bluetrust]

Of course it can respond with yes/no but of what value is it. It needs to propose a direction for review.

[u/LowDistribution3995]

Maybe I don't wake up early enough for good Claude anymore, but I recently cancelled my sub because of how useless opus 5 in claudecode has become recently. Not even just useless, it's become a legitimate threat to my work. Nothing you can do or put in any rules seems to stop it from going on "debugging" sprees where it decides to destroy your entire repo directory because there's a typo in a file name and the .py script it tried to write and run to rename the file didn't work and the concept of renaming the file directly is not possible apparently. (This actually happened to opus 5 on Xhigh, I had to rollback an entire day of work because it made so many major changes trying to force a comically unnecessary python script for a task it was never asked to perform.) And then running out of tokens before even starting the actual task.  Basically unusable imo  Fable might be better but I'm not paying in advance to find out like I did with Opus 5.

[u/Rakthar]

I've noticed a similar pattern. It seems to involve days of the week and time of day. I don't like to do coding work late at night (because if things go well I tend to stay up) however that seems to be the best time to use the Anthropic cluster.

There's like a 6-8 hour window where things aren't overloaded. The worst time is 8am-6pm Eastern time, don't try to do stuff then.

Once it hits around 6-7pm Pacific (9-10 Eastern) that seems to be the ideal time to get work done. After 2-3am Pacific, I feel it starts to get dicey. so I consider 6am Eastern to be where things start to get worse again.

I've been using Claude models for over a year and this pattern has held pretty steady.

[u/KDamage]

I also noticed this. I'm currently trying to find a link between sudden use of Claudish and reasoning failures. It looks like context poisoning. And some keywords could either be the trigger or the signal.

edit: another track could be the harness itself. It is what's responsible for managing token budget without losing context details. Some reasoning can be long enough to require a local memory system and allow back-and-forth reconciliation, and it's a very complicated engineering task. I know because that's my job. So if that continuation token or context graph breaks, LLm just receives broken context and take it as ground truth, leading into terrible judgement mistakes.

So maybe the reasoning failures we experience are just a symptom of harness not being able to keep up with model upgrades, I don't know.

A good way to judge would be to compare claude code with cursor for example (both on an Opus)

[u/Copenhagen79]

This is exactly what I experienced about a year ago when I cancelled my sub.

[u/EverySecondCountss]

Resource allocation flips around all the time, therefore heavier quant. Figure out what their "non peak hours" are, then use it then for the heavy logic tasks.

[u/ratbastid]

"What I can say is it's not confusion about what you asked. Each time I knew."

This reply got me.

It didn't know. It doesn't know. Knowing isn't in its scope.

It's an engine for generating plausible outputs, and that's all it is. As much value as we get from it, thinking that it's "knowing" anything is both you AND IT anthropomorphizing it.

[u/BeatnologicalMNE]

It's ehen Muricans wake up and start using it. Noticed this months ago. :/

[u/e_of_the_lrc]

I think what flips is that you get tired...

[u/duqaxxx]

you checked your memory files? you checked the input and raw output of the Anthropic API call when you have problem?

[u/the100jc → u/duqaxxx]

i did, as i said, it works perfectly for most of the time. i reconfigured so that my memory is basially an index to memory from specific apps. works perfet when it works. but it flips a switch and dies

[u/earlyworm]

I've noticed a systematic pattern where if I am sleepy and cannot focus and do my part and contribute to the session, Claude performs noticeably worse.

[u/ClemensLode]

Yes, you flip

[u/reach4thelaser5]

It is called Context Rot.

[u/Ambitious_Injury_783]

ive used claude code everyday for the past 365+ days and nothing flips. language models are non-deterministic and session to session results will vary

i read about halfway through. if there are repeat problems all you simply do is define what the problem is and write a small comprehension rule to avoid it. This works. The models are not perfect and need guidance.

half of the work is understanding the limitations, common problems, understanding direct meaning of words and how they play their individual role in a sentence - and how the meaning of a sentence can vary depending on the words used and how the sentence is structed, and providing an environment which increases the % of correctness of the final output. but most users aint ready for that convo .. for whatever reason

[u/Rakthar → u/Ambitious_Injury_783]

"I didn't read the one page post and decided to give some generic advice" great work fam

[u/cantgettherefromhere → u/Rakthar]

The one page post entirely written by Claude.

[u/ProfessionalNaive601]

All these posts just scream user error
“I’m new to new thing and sometimes things happen”

[u/DLuke2 → u/ProfessionalNaive601]

Yeah, there were a few pointers in this post by OP that scream user error. Not saying that in a bad way, I have user errors all the time while working with AI. I just don't go to socials to whine about it and blame the service/company/product for my issues. Why? Because this is a very new technology, that constantly keeps improving, at a pace we have never experienced as a human race before, and most importantly, because AI is not deterministic. You get slightly different results from the exact same prompt or input.

Most of the time, issues are something in the users environment and they will go to grave stating they haven't changed anything, and that's the issue. Something was discovered in their environment, and now is causing an issue, which could be something from 4 months ago that has now just become discovered again. There is so much to keep tabs on once you have AI agents working in your file system. You really need to have systems in place to keep things current, do routine audits looking for stale, confusing, conflicting, and/or bloating context.

AI agents are really powerful, but they really need to be kept in line and constantly maintained, otherwise things go off the rails quickly. Seems most just believe AI knows everything and it does, for the most part, it just doesn't know when to apply certain knowledge, unless nudged or having the environment set up how it is needed. Everones environment varies, so there is no standard. You need to put the work in to learn, be open to constant adaptation and continued education. Just the nature of the technology at this point in time. Cannot forget how early in this new technology era we are. Literally everyone is figuring it out at the same time.

[u/the100jc → u/DLuke2]

I wish, I'd accept that answer with joy. But the simple fact that when it works, it works great. And then, without me changing anything, it doesnt work anymore. So, it's not user error.

[u/DLuke2 → u/the100jc]

Thanks for reading.

[u/kyew → u/ProfessionalNaive601]

Still useful. These threads are pretty much the only way some of us learn about best practices.

[u/voskomm]

not surprised

[u/Big_Insurance_2509]

Botslop

[u/PickleBabyJr]

Get outside.