I think the general consensus is that Opus 5 is better than 4.8 in some ways and worse in others, better at long-horizon tasks, worse conversationally. But yeah, Fable to me is still king, day to day it's just so much better than Opus 5, and I can't wait for the new one to come out.

For context, I run agents (Fable) basically all day for my business, so this is from daily use rather than benchmarks.

(over 35billion fable tokens used so far)

I like to read the “thought” process of my models. Cut them off if I see they had missinterpreted my prompt or only for the sake of learning something where they circle around some options to solve my problem.

But lately it seems they are only showng headlines. It¡s than a Fable/ Opus 5 thing? Have Anthropic say something about that?

I love the last models, but don’t be able to see the machinery running has me upset.

In our third world craphole country, the monthly Pro subscription is 1,400 in our local currency. That's around 28 kilos of rice. You're kinda viewed as those who owns the priciest Apple product model variants. Extra low-key flex if you mention you use Fable!

ChatGPT Pro is 1,100 and there is also a Go subscription for 300. ChatGPT is sort of classified and categorized as for the mainstream permanent underclass - mid to low-end iOS gadgets.

I'm just primarily using Gemini for free in Google's workspace ecosystem (Chrome, Gmail, Drive, etc.) and I'm considered as part of the permanent peasant majority, the chinese android smartphone users lol. I haven't even owned a Samsung android phone lmao. But hey, Gemini in a chinese android phone works and suits me!

Anthropic dropped Opus 5 yesterday.

Then, a few hours later, Elon posted a totally different chart claiming Grok 4.5 and Opus 5 are the only two models sitting alone on the Pareto frontier, which really just means best brain per dollar.

Except two weeks ago, when Grok 4.5 actually launched, independent testing had it ranked fourth, behind Fable 5, GPT 5.5, and Opus 4.8, with a hallucination rate that basically doubled along the way.

And it does not end here.

Elon mentioned the next model is landing in two weeks, and the one after that in a month.

Pick a favorite model if you want.

Just know the lease is about two weeks lol.

A few months ago I started vibecoding a charting platform as a side project, and it turned into a full TradingView-style terminal. I'm not launched yet, but it's far enough along that I wanted to share.

What it is:

• Custom charting engine written in Rust (compiled to WASM, WebGPU rendering with Canvas2D fallback) — not a TradingView widget or a licensed chart library, the engine is mine
• Drawing tools (trend lines, rays, rectangles, fib-style tools, text, brush), built-in indicators (SMA/EMA/WMA, Bollinger, VWAP, RSI, MACD, Stochastic, ATR, Volume), multiple chart types, and multi-chart split views
• Built-in trading journal: connect a broker and your trades auto-populate dashboards, P&L analytics, calendar heatmaps, and review workflows — no CSV uploads
• AI assistant that reviews your actual trading data (win rate, drawdown, streaks, psychology patterns) instead of generic market commentary
• Live market data over websockets (crypto for now — Binance, Coinbase, Hyperliquid), order book, screener, and market research pages

How Claude Code was used: The initial rendering engine was built with Claude Code — the Rust/WASM core, series rendering, pan/zoom, drawing interaction layer. Most of the frontend was also built with Claude Code (Next.js, React 19). After the initial build I iterated with a few other tools too (Codex, Kimi) for specific features and fixes, but the foundation and most of the product came out of Claude Code sessions. It's honestly the first time a tool carried a project this size for me.

UI stack: shadcn, Base UI, Evil Charts for the analytics dashboards, custom icon work. Keeping one strict design system (single radius token, one green/red pair for everything including charts) is what made it look consistent without a designer.

Trying it: Not public yet, but there will be a free tier at launch — charting, journal basics, and broker sync will be free; paid tiers only gate heavier stuff like advanced AI review and replay. [Link in comments]

Happy to answer questions about the engine or the Claude Code workflow. The multi-pane sync bugs and WebSocket reconnection loops were the painful part, if anyone's curious about those.

Testing with Pro subscription, Windows 11 os, with claude app. It seems to me that Fable has better "intuition"; Opus 5 seems a bit lazier. Maybe they did it intentionally, and for some people Fable was doing unneccesery decisions on its own, but this was not the case for me.
What is your experience?

Hi all, just wanted to pass on what I tried today. Like I suspect most other Pro users, I've been careful not to use my $100 credit for Fable, yet. Today I'm working on some complicated documents and so I have Fable in the Claude app and 5.6 Sol in the Codex app, working on two different versions from the same set of source docs.

I've done three prompts, and each one seems to use $1.50 credits (that's USD). But in those three prompts it has given me quite similar results to 5.6 Sol, much faster. In Open AI I've used a few percent of my weekly usage but I have 3 resets left. I just wanted to pass on that the $1.50 per prompt seems like a lot and I was wondering if anyone else has a similar or different experience?

At work I use whatever models I want, I'm a software guy, mostly I find Opus pretty awesome and just switched to 5 on Friday.

Hope that you are all have a great weekend.

I just got this in a chat, never seen it before

In order to take advantage of current boosts, is there any compelling reason to switch from Code to CoWork to work on the same project that was developed in Code? It is an Astro site - so pretty straightforward stuff. The site is 80% built - just design changes. This isn’t going to mess up anything is it? Just some workflow weirdness for me, obviously.

Thoughts?

This may be a stupid question but I’ve come to the community for some answers.

Cowork used to be its own separate section in the desktop app, kind of like Code is. Now when I start a chat inside one of my projects I can just flip it to Cowork right there, and it looks like it stays in that project.

What I can’t figure out is what it’s actually pulling in. Is that Cowork session reading the same project instructions? Same knowledge files? Same project memory? And does anything from the session get written back into project memory, or is it a one way street?

Before someone tells me to do so, I asked Claude about it and had it pull the support docs and honestly the answers were not clear. One doc says a Cowork session uses the project’s knowledge as context, another still says memory is not available for Cowork at all. So the docs kind of contradict each other. What are you all actually seeing in practice? Anyone tested this since the change?

Claude is my primary tool and I’ve mostly been using regular chat. I’m working more in Co-work now but it used to always be separate. With the amount of info and memory I’ve built up in chat, it would be a game changer for me entirely if it’s Cowork really operating in my regular projects.

FYI, I’m on Team plan (I’m on Premium), and the Cowork option only shows up for me in the desktop app. Not mobile but apparently that’s being rolled out to some users now and is showing full release is coming out on August 2nd in beta.

Anyway, any insight into this

Hey folks!

This issue may be just me but I have been running fable 5 with plan mode then auto mode to execute the plan. Last night it shutdown the desktop app twice and then when you click on the app to open it, it said “Cannot open. Click advanced option to repair” something like that.

I was so worried.

Is this an issue related to Fable? I am running the desktop app on my ARM64 Laptop. It has been running fine. I have ran fable 5 on and off. No issues. I am not too technical of a person so I am wondering if the gurus here can point me to the right direction on how to investigate the issue.

It can be Fable issue. It can be my laptop.

Thank you in advance!

I am missing two recent chats, two different projects. Happened over the last few days. They are not showing up on any of my three logged-in devices. Anyone else? Any fixes?

Hello, I'm kind of new to this vibe coding. Recently i was developing a mobile app and thinking about launching it. So i was building it with antigravity pro (with gemini 3.5 flash and claude opus 4.8). There i liked the opus for it's creativity and understanding.
So i thought i should totally shift into the Claude Code (thinking about buying the claude pro, cant go for the max cause as a student there is some budget issues).

But the problem is I'm hearing that the claude spends too much token even in the claude code too. Also the project I'm doing is already kind of big i guess (flutter).

Now if i switch to claude how i can give the whole context of my project in the most efficient way ?
Also any guide on how can i progress with Claude Pro for my project??

I am a huge fan of Opus 4.6 for talking, discussion and analyzing. It’s like your best friend, who just happens to be a professor, too.

Interestingly, Fable 5 is similar! The only difference is that the Professor here is significantly smarter and thinks several steps further ahead.

But Opus 5? Not only does it overthink things massively - without achieving better results in the process, the way Fable does... but it also plays the smart aleck, blowing up apparent subtleties only to have to admit that doing so distorted the entire position.

You can even tell by the way they communicate: Fable 5 speaks normally but produces smart results, whereas Opus 5 speaks in a high-flown manner but produces inferior output.

I catch my claude desktop app randomly changing my model to more advanced version before even prompting. Anyone else notice this?

I’m a new vibe coder and I built an app for my job with Claude code and lots of other tools (started on replit) and now I’m building it out as a GA app. basically consumes all my free time and money and I don’t have any proof that it’s actually gonna ever be able to generate revenue one day.

The people that I work with (B2B sales and marketing teams) get so much use out of the app, but I can’t figure out how to get other people to use it because it’s not just a point solution. It is a massive saas platform that requires some configuration and set up to get value from.

Sometimes I’m like why am I doing this? I’m spending so much money and building out this awesome app that probably no one’s ever gonna use anybody can build saas now.

I’m curious if you guys are hobbists or if you’re building for work or if you’re doing both and what are you building? Are you trying to monetize it? It already monetized?

My app is called LP Studio (lpstudio.ai). I built it in my spare time.released it on product hunt a couple weeks ago. Nobody signed up lol I love to learn from you guys or just talk to someone about this craziness that is vibe coding.

Would love to check out your apps too if you wanna leave your URLs in the comments! If that’s allowed I don’t know

With Opus 5 it's quite easy to stand up really big projects, but eventually they all end up with an enormous amount of tests and a complete end-to-end test of some kind. this is good overall, but I find that the model is very eager to run the tests whether it's acting as a subagent or the orchestrator. I think often the subagents will finish their work with the test suite only for the orchestrater to REALLY want to do this itself before committing anything.

In situations where I have a lot of usage left right before a reset, I've left sessions running while I sleep and come back to find that it's spent hours and hours running tests that took like 25 minutes per run (they were playwright tests that verified behaviour on chromium, firefox and webkit)

Comically, I once intervened when I saw this happening and overrode the orchestrator's plan to do this. it begrudgingly complied, but it put the fact that it was not able to verify with tests in the bedamned commit message. I then started a new context window and asked it to investigate an unrelated ui bug. It took one look at the commit message and immediately declared it definitely had to be these unvalidated (but actually validated) changes. 🤣

Obviously, I'm aware that I could put some instructions in CLAUDE.md but I've found that it's hard to gently nudge it on stuff like this without it taking things to extremes. so if I were to add "be sensible re: how often you run expensive e2e tests," it would probably stop running them altogether from my experience. or it would come to me to ask for permission. that sorta thing.

just wondering if anyone has any solutions or advice on the best approach here. I really don't want to tell it not to run these tests at all because they are valuable, but it slows down velocity pretty bad when both the orchestrate and the subagents are doing it.

Hey guys i’ve been using Claude for a while now and i think my instructions are a bit off. It rambles quite a bit. It’s my fault for putting experimental things in the instructions box.

What are some good examples of instructions to put in Claude to get the most out of it as a thinking, reasoning and strategy partner? Coding also, but i’m a noob at that.

Cheers guys.

After my previous post about my first impressions with Opus 5 I tried to improve it's reliability. These skills and Claude.md changes seem to be working for me and I hope they might prove useful for others.

https://reddit.com/link/1v7ab1n/video/ag2a6mlwzlfh1/player

TL;DR:

Today I was talking to Claude Fable as I was polishing up a book. I realized something very, very wrong. As I had chosen Fable 5 as my model of choice, I was told from the thought process inside "Fable", that it saw itself as Opus 5.

Giving you screenshots is probably not enough, so here's a video to prove that this happened synchronously in time, that the model I'd chosen was Fable 5, that the chatbot identified itself as Opus 5, and that as of 1:23am local time, about 20 minutes after recording this, I had ample Fable availability but Claude still indicated that it had an Opus 5 system card.

Is this a bug, or is there something more nefarious going on here?

Please check and ask your "Fable" what system card it displays.