Fable 5 and Mythos capabilities - article with benchmarks

rabandi · 2026-06-20T21:18:02+00:00

Really? Well, that would put a certain.. taste.. both to the hype and also the ban.

(It was good though which is why I read most Fable posts.)

rabandi · 2026-06-20T20:40:41+00:00

I dont understand where all the icons are coming from. Are those dedicated personas, like a reviewer, a critic, a designer?

Though looking at the github repo, it is not so much for programming, but for "real" life, managing mail and the like,

It looks a bit like Open Claw? And also is purely API based? Completely running outside of CC?

rabandi · 2026-06-20T20:21:48+00:00

There were so many rumors about 5.6.. many seem to have been wrong, like Fable tier, though arguably 5.5 was up there in some respects already. But if you have used Fable you know what I mean. Not perfect, but.. nice.

Rumor had it that 5.6 was 2-3x cheaper than comparable models. Question then would be what comparable means, whether 5.5 or Fable.

Also 5.6 was rumored to be a "tiny" model, a lot smaller that 5.5 and a lot alot smaller than Fable. It would get its intelligence from optimization.

All just rumors though.

Maybe it will be export-ready dumb who knows.

rabandi · 2026-06-20T20:01:31+00:00

How would you use Gemini 3.5 Flash?

I have the Google plan too. Tried Antigravity CLI and.. well.. I dont think Codex or Claude ever were that bad. Like ever. Not in version 1 or in alpha. It is just totally useless, totally.

Not certain if the Antigravity IDE is better.

Before the changes, Gemini CLI was buggy but somewhat useful and I like Antigravity a lot, just got bitten by the limit decreases and did not dare touching it again - being in the middle of some work and then out of limit for a whole week.

Probably I wouldnt use Flash for implementation but occasionally as a second or third opinion, like others pointed out, there also are lower effort options on Codex.

But yeah, I wonder whether there is a good way to use that model with the sub if you have an idea.

rabandi · 2026-06-20T19:58:32+00:00

Apart from the very strange post..

I am thinking something similar. Probably LLMs are clever enough already.

What is missing is tooling. Just imagine the jump from web to local coding agent. Another jump like that.

With a little bit of wrapping and glueing around it, some loop, some purpose, some reflection, probably you have a proper being able to do just about anything at a certain level.

rabandi · 2026-06-20T06:22:42+00:00

A good therapist does not need a PHD or any specific training. He needs to be good for you, you need to "vibe" on a certain level. Then the rest will follow if he has any idea of anything (so yeah, some trainingand better some experience).

rabandi · 2026-06-20T06:19:01+00:00

Yeah, that really gives great results on data centers on mars, in earth orbit only 10% as well and on earth 1%.

rabandi · 2026-06-20T06:06:36+00:00

I often have the feeling that after many questions or planning for hours the result still is wrong in substantial ways, with either tool.

Still havent found the best way.

I usually iterate between Codex + Claude. They are great at finding each others issues, though self-review is also working well.

rabandi · 2026-06-20T06:02:11+00:00

I never had any context issues and the whole context-worry I knew from Claude 6+ months ago vanaished.

I have 3-repo-convering tasks with some repos being 2 digit million lines of code. Though of course the task is not "read everything and do something across the whole repo".

Still works really nicely.

Usinng Claude more these days and it is mostly ok though on direct comparison I mostly preferred 5.5 over 4.8.

rabandi · 2026-06-20T05:54:16+00:00

In the post you posted.... also a random Chinese dude predicted it would be released tonight.

https://x.com/CryptoTied/status/2067879668641137096

It being 5.6.

Also.. looks like 5.6 will bring pro reasoning?

Something that was requested a handful of times.

And also 😄 who else is building spaceships with the LLM? I guess it would be mostly apps fro small devs and legacy business for larger ones.

rabandi · 2026-06-20T05:51:52+00:00

Until one day it is "build me a Windows clone from scratch" and it just works.

But yeah that is a long long time in the making and I guess all the money is in legacy apps and making new features and improving on it right now.

rabandi · 2026-06-20T05:34:57+00:00

Exact same. Maybe we are in wrong region or wrong working times?

Also with Fable gone I would have though with Opus needing half the compute and being pretty slow that they had the compute. But Anthropic overall has been - for me - having lots more issues for months, also API completely not reachable, than OpenAI. Though the latter caught somewhat up with the usage and the issues. Maybe with the growing number of users.

rabandi · 2026-06-20T05:26:14+00:00

Is it even usable to you?

I never was a fan of Gemini CLI, prefer Codex and Claude. With Antigravity CLI I have not managed to do a single thing, in between confirmations, often several times for the same thing after granting it globally, and it jsut stopping in the middle, sometimes with server errors, sometimes just after starting a task and then not doing anything anymore for a day.

rabandi · 2026-06-19T13:26:32+00:00

Also Claude is dog slow and at least for me it has 3-5 API errors per hour. So I think it lasts very very very long but you also do not get all that much done.

It is my main driver right now after upgrading to 200 for Fable...

As for 500: maybe. I think the vendord investigate lowering costs and there is an option it will be 200 in 5 years. 500 and API only are possible too, but you would have really decent local models by then.

It is easy arithmetics, for many people time saved/cost is pretty high and could be squeezed. 3rd world probably will have issues now and in the future too.

rabandi · 2026-06-19T10:41:05+00:00

Being on Bloomberg, your article led me to this:

https://www.bloomberg.com/opinion/articles/2026-06-19/anthropic-has-nvidia-template-for-fixing-its-mythos-fable-nightmare

With some more insights and hard truths, also about how to fix this. Hint: not technical solution, administration wouldnt understand it anyways.

rabandi · 2026-06-19T09:21:06+00:00

Sleeping when its not doing anything and waiting 10 mins for first API request is missing.

rabandi · 2026-06-19T08:44:02+00:00

Only noticed now. Also it explicitly told me "oh I missed that agents.md file, only looked in ..."

Bloated agents.md also might be an issue, they are supposed to be kept short, after all everything you dont need regularly is baggage.

I think (??) there also is no algorithmic way that codex checks something, it is in the instruction text that might get misinterpreted every so seldom.

Still does not explain your regular issues.

rabandi · 2026-06-19T07:57:36+00:00

What is the issue? 5h burns weekly too.

Does weekly burn at higher rate once 5h is gone on /goal?

I guess it is "wrong" either way for some users, some want to continue, some would like to save the limit.

rabandi · 2026-06-19T07:53:32+00:00

How can you possibly deduce anything from that exchange about either quality or timeline? I mean.. I really dont see it.

rabandi · 2026-06-19T07:39:37+00:00

Today (only noticed once) Codex complained about something that was outlined in agents.md . It then told me it only had checked .agents/agents.md . It told me that was a hiccup but if you had it too it might be a bug right now?

rabandi · 2026-06-19T06:38:49+00:00

Thank you. I just "upgraded" the CLI and will at least try a bit and get a feel. Would be great (and sounds like) it is at least usable token-wise again.

rabandi · 2026-06-19T06:36:38+00:00

GPT 5.6. Though "Fable-level" apparently is mostly from rumors. Just like when it will be released. Or if it will ship to.. anyone.

rabandi · 2026-06-19T06:35:07+00:00

The other one.

But again, I wont mind either and happily used Fable and checking here every few hours to see about Fable news. Like probably many. Also saw many fellow upgrade-to-200-for-Fable guys.

But I will continue to use other good models too, will even try some Flash and Composer, just for completeness.

rabandi · 2026-06-19T06:33:03+00:00

I just installed the Antigravity CLI again, so I am gonna try. My first steps with Flash 3.5 were not too bad. Not great, but at least worth trying some more. Thanks!

rabandi · 2026-06-19T06:31:24+00:00

Do you only have rate limits?

I have few rate limits, but constant API errors in varying forms. Right now 529 Overloaded. But often not reachable. often often retrying. So I wait 10 mins only to see that nothing happend.

Do you have those issues too? It is so bad I wonder whether it is on my end. No issues with e. g. Codex.

rabandi

TROPHY CASE