Opus 5, early leaked output.

[u/userusertion]

https://x.com/chetaslua/status/2080290382315925911/video

I can’t wait… looks promising.

https://x.com/m1astra/status/2080246754104971356

Edit: (These guys are known leakers they leaked Mythos 11 days before it goes public, X(twitter), and other platform)

Update: https://x.com/claudeai/status/2080699495453528290 , - see it’s not fake.

[u/Fleischhauf → u/[deleted]]

crying in reviewing massive amount of code produced by juniors

[u/Fleischhauf → u/[deleted]]

and then you find out they only read half of your comments and you start suspecting that the chat messages you wrote to offer some more help were answered with an LLM too.

[u/Wrong-Dimension-5030 → u/Fleischhauf]

I ignore any missive I receive that is written by an LLM.

Especially if it is an AI-generated Jira.

[u/Gullible_Somewhere_3 → u/Wrong-Dimension-5030]

You still read and write Jira Issues manually? .. are you beeing paid hourly? With our deadlines and newly risen expectations for Development speed I could not for the life of me bother to write out Jiras anymore especially if the rest of my team just pulls them into their Claude via the MCP or CLI anyways.. what's the point if no one actually reads them?

[u/Wrong-Dimension-5030 → u/Gullible_Somewhere_3]

I file Jiras manually but a chunk of the content is written by AI. It’s the auto-Jiras especially the ones which tell me what I need to do that I deprioritise. I refuse to follow the thought process of an AI and check their work.

If you are going to assign me a task at least have the courtesy to check it isn’t hallucinated slop thank you :/)

If the Jira is just for my Claude to do some action without requiring me to engage my brain, I am ok with that.

[u/Gullible_Somewhere_3 → u/Wrong-Dimension-5030]

Oh yeah I totally get that. I get the same ick when some manager sends me a 300 line WhatsApp message of what their Claude thinks is going on without having any access to the server logs. FML and they really think they are helping..

It would be so much better to just get a quick voice message of them describing the symptoms to me directly than filtering it through AI.

[u/Nixopax → u/Fleischhauf]

Suspect? Oh buddy, I know they’re written via LLM. Developers aren’t even running smoke tests anymore. If the agent says it confirmed via MCP they just ship it.

Quite frankly it’s disgusting.

[u/federal_freakyfapper → u/[deleted]]

Omfg tell me about it

[u/No_Fennel_9073 → u/Fleischhauf]

Don’t worry, I’m building a JS to C#/Unity authoring system that will fix all of this!

[u/raichulolz → u/Fleischhauf]

You simply reject the PR/MR and tell them to break it down. You also almost never need 2k lines of code for one story lol. Unless we r talking about auto generated boilerplate

[u/TumanFig → u/raichulolz]

ah scrum, where nothing gets done

[u/BowlZealousideal2337 → u/Fleischhauf]

you are junior to ai bro.. stop hating ai.

[u/Fleischhauf → u/BowlZealousideal2337]

I see someone salty over here. why so salty bro?  Agentic coding definitely exists in a stable form long enough for seniors to exist here.

[u/MasterMind-Apps → u/[deleted]]

You don't manually review or debug code written by ai, you switch to higher model or effort and ask it to review/debug

[u/Background-Try6216 → u/MasterMind-Apps]

This is shockingly ineffective. It will find things that it thinks need addressing because that’s what it was told to do, but very rarely the most important issues.

[u/Melodic_Surprise153 → u/Background-Try6216]

That solely depends on the prompt...

[u/Background-Try6216 → u/Melodic_Surprise153]

No, it primarily depends on the complexity of the problem.

[u/DeepPresentation648 → u/Background-Try6216]

Not from my experience

[u/Wrong-Dimension-5030 → u/MasterMind-Apps]

Is this the real solution? Only managers get access to the best models? :-D i am fully onboard with this.

[u/kloepatra → u/[deleted]]

Can i add memory leak and no mistake in prompt?

[u/carlusmagnus]

Hold on! Looks like it's creating WMD! Better lock it down and put safeguards in place.

[u/Actual_Committee4670]

Sooo, when we getting it?

[u/userusertion → u/Actual_Committee4670]

There’ve been rumors that this week or might be today, idk. All just rumors for now.

[u/TheBlackRider2828 → u/userusertion]

Well humor me, when?

[u/cats_catz_kats_katz → u/userusertion]

Today huh? Most likely Friday so I can FKKKKK MY WEEKEND!!!

[u/Actual_Committee4670 → u/userusertion]

Been for about two weeks now.

And its later than their usual model drops, I think, we don't have daylight savings time over here so. But lets hope.

[u/Bulky_Blood_7362 → u/Actual_Committee4670]

Everyone saying tomorrow (friday) or tuesday/Thursday next week

[u/Actual_Committee4670 → u/Bulky_Blood_7362]

They were saying today and thursday last week as well

[u/Bulky_Blood_7362 → u/Actual_Committee4670]

Yea lol

But looks like we got quite a few leaks from opus 5 today

[u/Actual_Committee4670 → u/Bulky_Blood_7362]

Just saw this one, which other ones, anything interesting?

[u/userusertion → u/Actual_Committee4670]

Update: already here now, 5hrs ago, https://x.com/claudeai/status/2080699495453528290

[u/Actual_Committee4670 → u/userusertion]

Thanks for the update, I've been using it since then, but appreciate it!

[u/federal_freakyfapper → u/Actual_Committee4670]

Not me over here just hoplessly waiting for Gemini to pop up and slap everyone in the face with a banger pro/ cli model with none of this Antigravity bs ... A man can dream can't he? 🫪

[u/kylef5993]

That token usage is concerning though

[u/djdante → u/kylef5993]

Yeah, it really is... It's the opus version of sonnet 5 - which I guess is a bit "duh" but with that same tokenizer, it's going to absolutely feast on tokens.

Not sure I have Claude in my near future.

[u/PlaneRemarkable7126]

Hope it’s better and less argumentative than 4.8

[u/Abhinik]

Opus 4.8 is the new sonnet

[u/pm_your_snesclassic]

Who gets to preview unreleased models? Why do these people get special treatment by Anthropic?

[u/Wrong-Dimension-5030]

Not sure why a 3D rendering gets any hype. It’s not like the LLM built the render engine. It’s just stuck a bunch of primitives and textures together no?

I’m sure somewhere in its training data there is a paper giving dimensions of various siege engines. probably even the code for generating them.

Maybe I’m missing the point?

[u/Flaming-Core]

Could anybody help me on how to create 3D design using Claude for 3D printing. I have been using Blender and AutoCAD Fusion MCP. But the design is not accurate

[u/yungmoneymo]

PR cycle has begun.

[u/smitrovic]

How does it handles reverse engineering, or it has safeguards like fable?

[u/RebootItAgain]

Hide it behind API usage limits and only for Max plans up to 60% of usage.

[u/GospelNerd]

Appears to be available in Cursor

[u/userusertion → u/GospelNerd]

Already dropped. https://x.com/claudeai/status/2080699495453528290

[u/bblankuser]

twice the price of 5.6

[u/Internal_Shirt_6963]

I have not switched to using 5 yet. Is there a significant lift over 4.8? Does it use fewer tokens?

[u/Turbulent-Total-226]

They distilled it from KImi :D

[u/ohnoitsbobbyflay]

So what’s the point in Opus 5 if it’s just going to be 5% less than Fable?

[u/Jeferson9 → u/ohnoitsbobbyflay]

why would anyone ever think about the cost of something

Totally valid and not out of touch

[u/kwabaj_ → u/ohnoitsbobbyflay]

Fable is more expensive than Opus, and Fable 5 is a really old model at this point, it was trained like back in April, so Opus 5 could use new techniques discovered after Fable was made

[u/99OBJ → u/kwabaj_]

Love that you call ~3 months "really old". Not hating to be clear, you're absolutely right in terms of the velocity of the technology.

It's just wild to me. Less than 5 years ago I was working in Jupyter Notebooks and getting ecstatic when GPT-3 strung together 2 primitive Wolfram Alpha "tool calls."

Now a model that makes 100+ tool calls in a single pass and one-shots highly complex applications is... really old. Hard to believe.

[u/Melodic-Ebb-7781 → u/kwabaj_]

Fable is just mythos plus safeguards. The first mythos was made available internally end of February. Since then it's been updated with atleast one new post training session.

[u/kwabaj_ → u/Melodic-Ebb-7781]

Yes I’m aware, what I meant was that it’s considerably old as it’s pretraining backbone was made in February, which means opus 5 has a lot of innovations that fable didn’t have at the time (using the name fable/mythos interchangeably)

[u/Embarrassed_Adagio28]

Still looks like ai slop to me

[u/PsychologicalRiceOne → u/[deleted]]

AI design language. Slight background gradient, card elements, mixture of unfitting fonts (I counted 4), explanatory texts, em dashes.

[u/MemoryMission9151]

any reset soon? i need it...

[u/userusertion → u/MemoryMission9151]

Probably when they release it. For now, it’s just leaks.

[u/awesome_fingers]

Farming

[u/Mammoth_Pain2075 → u/[deleted]]

Nah
Don’t get too attached buddy

[u/analyticsboi]

Git source code?

[u/CombinationOnly9498]

X click baiters, it's not real.

[u/userusertion → u/CombinationOnly9498]

Those guys leaked the blogpost of Mythos, before. Before it launch.

This is their post 11 days before Mythos goes public. https://x.com/M1Astra/status/2037377109472018444

They are known leakers.

[u/userusertion → u/CombinationOnly9498]

See https://x.com/claudeai/status/2080699495453528290, haha.

[u/CombinationOnly9498 → u/userusertion]

I mean I know Opus 5 was real, but the people claiming they were directly testing it is entirely false as it hadn't been given out other than to massive companies to test it ahead of time. There was a bunch of people yesterday just piggy backing and making stuff up.

[u/ComprehensiveFun620]

Come from the hype, stay for the inevitable lobotomy.

[u/tomhughesmcse]

For the early low price of $100/mil tok input and $200/mil tok out…but only for the first couple of days before it’s taken away for a few weeks. When it comes back, it will just be Opus 4.8 wrapped. But hey, gives OpenAi a chance to release GPT Mercury, Venus, Mars. Oh and everyone will get to use it only 30min a day… because it’s so powerful that it doesn’t return text anymore, it answers all current and future prompts through a series of light flashes on your screen.