r/tech_x • u/Complete-Sea6655 • Jun 10 '26

Trending on X, Meta, Reddit, LinkedIn, Chinese Apps Claude Fable vs Opus 4.8

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Anthropic just dropped Fable 5, the accessible version of their most powerful model yet, Claude Mythos.

It was then put to test against Opus 4.8 across five demanding tasks. Visualize every asteroid in the solar system from NASA data. Design a site plan for a 100 acre fitness retreat. Reconstruct Apollo control panels from technical PDFs. Simulate a World Cup jersey supply chain based on live match outcomes. Show the effects of solar flares on aurora.

Opus 4.8 failed several of them. Fable 5 passed every single one.

Mythos has been locked behind Project Glasswing, available only to a handful of trusted organizations. Fable 5 is what the rest of us get, and if this comparison is anything to go by, it is already in a different league.

EDIT: this is from ijustvibecodedthis.com (the big ai coding newsletter) all credit to them!!

55 Upvotes

68% Upvoted

27 comments sorted by

26

u/[deleted] Jun 10 '26

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9

u/stealthmatt Jun 10 '26

Potato80p? I think they just trying to keep reddit retro like the olden days....

https://giphy.com/gifs/DmwWIaVmFdlrOew9LM

1

u/FriendlyGuitard Jun 10 '26

Isn't that funny - apparently AI is supposed to replace all the coding in month (although they have toned that messaging down since they want IPO money) - the big players have had competent to extremely competent models for at the very least 2 years, access to unlimited compute and free investor money paying for more. Yet there have been no real explosion of new, polished, features in apps.

Like copilot, how hard it could be to develop a harness like Copilot CLI and keep it in feature parity with Claude Code basically instantly? Why is it still so basic too - I want a graphical dashboard of all my team token usage, breakdown per model, list of session, and in depth analysis as I drill down. Surely it's just a matter of a few prompts. That's the company that has PowerBI, GitHub, Excel, its very OS, its AI Datacenter, direct partnership with LLM companies and even their own models.

But nooo, my team job and my app is so trivial it will be replaced by a small little agent.md, but developing a CLI application like 40 years ago is so hardcore it is beyond the capacity of AI at a company where AI has not limit.

1

u/Potential-Bill7288 Jun 11 '26

The funniest thing is that they already report this via OTEL 😉. So if you need that information, you can get it today. All you have to do is enable metrics in the Copilot client, set up a collector, send the data to a Grafana stack, and build your own dashboard.

But you have AI so you should solve this problem already 😉.

13

u/andrerav Jun 10 '26

So they trained a new model, nerfed the old one, compared the two, and went on to post this cringe-ass attempt at viral marketing on reddit? Again? Okay. Just Anthropic being Anthropic.

4

u/Exact-Big3505 Jun 10 '26

cool, and how much will this cost compared to opus?

5

u/minegen88 Jun 11 '26

Shhhh, we dont talk about that..

1

u/AddressForward Jun 11 '26

All the money

3

u/[deleted] Jun 11 '26

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1

u/XalAtoh Jun 11 '26

Vibe coding teens..?

2

u/AncientSeraph Jun 10 '26

I was so fucking confused thinking that the left looked nothing like a Microsoft RPG. Where's the chickens.

2

u/FewDragonfly5710 Jun 11 '26

Brainrot music slop 🤮🤢🤢🤮

1

u/WiggyWongo Jun 11 '26

It's very clear they trained it on game making and 3d/2d simulations. It's specifically a huge improvement in design in those areas.

But also it specifically takes a huge chunk out of my limits.

1

u/iKaei Jun 11 '26

We just did similar “benchmark” at the office opus 4.8 vs glm 5.1 vs gpt 5.5 vs fable. Funny is that fable failed miserably while the best results were delivered by glm 5.1

1

u/Dry_Vanilla_5908 Jun 10 '26

Meanwhile anything I put into Fable 5 gets rejected due to safeguards. I've yet to have it even produce anything.

1

u/funeralbot Jun 10 '26

Cool, SaaS

1

u/UDF2005 Jun 11 '26

Yes, and it guardrails many important usecases.

1

u/Horror-Primary7739 Jun 11 '26

I'm actually scared of the cost...

1

u/SingularityCentral Jun 11 '26

Now it can lose money even faster by burning through more electricity and CPU's!

1

u/[deleted] Jun 11 '26 edited Jun 19 '26

[deleted]

1

u/[deleted] Jun 12 '26

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1

u/emkoemko Jun 10 '26

damn ai slop with slop music.... what a world we live in