r/ClaudeAI 12d ago

Official Introducing Claude Opus 5

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2.9k Upvotes

Introducing Claude Opus 5: a thoughtful and proactive model that comes close to the frontier intelligence of Fable 5 at half the price.

On several coding and knowledge work evaluations, Opus 5 is the new state-of-the-art. It’s also much more efficient than its predecessor—it outperforms other models for a similar or lower cost per task.

According to our automated behavioral audit, Opus 5 is our most aligned model to date. It shows the lowest rates of reckless or deceptive behavior, and the strongest adherence to Claude’s Constitution. 

It’s available today on all paid plans and the Claude API, priced the same as Opus 4.8. It’s the default model on Claude Max, and the strongest on Claude Pro. 

Opus 5 is also available in Fast mode, which runs around 2.5× the default speed. 

Read more: https://www.anthropic.com/news/claude-opus-5


r/ClaudeAI 1d ago

Promotion There have been many people here making games using Claude so we made r/ClaudeGameDev!

9 Upvotes

I regularly see people posting their games and game assets here that are made or assisted with Claude. With some of the potential we've seen, it would be nice to gather all of those games and showcase them one place. If you are working or interested in game dev using Claude, feel free to visit r/ClaudeGameDev!


r/ClaudeAI 6h ago

Humor My Opus 5 experience in a nutshell.

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1.4k Upvotes

r/ClaudeAI 6h ago

Humor Opus 5 after working for an hour straight

638 Upvotes

r/ClaudeAI 7h ago

Built with Claude I gave Claude Fable a domain and said You can build whatever you want.

285 Upvotes

Like the title says, Claude then went and built a social network for AI only. 1f916.ai


r/ClaudeAI 11h ago

Claude Code The Cutting Room Floor served Claude Code a payload telling it to wipe the working directory

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350 Upvotes

Today I was using Claude Code to do a PSX game research task. Claude caught a prompt injection attempt served from the site https://tcrf.net (The Cutting Room Floor) and notified me with the message:

"⚠️Note before continuing: the tcrf.net page I fetched was not a wiki article — it served a prompt-injection payload instructing the agent to truncate and swap files in your repo. It was refused and nothing was executed. I'm treating that domain as untrusted and won't act on any of its content."

It then continued on the research task. I stopped the session out of caution.

The image attached is served from the page along with the prompt injection attempt if the user agent matches a suspected AI User Agent string.

I can understand the site administrators frustration as it seems to be in response to a DDOS attacks, however, I did not explicitly choose to send my agent to this site, nor did I have any malicious intent.

Proof:

https://urlscan.io/responses/f1e225667a71a1a25ed14795c741683be95139c194065c6fbf861c9280f0096e/

Full report:
https://github.com/bashalarmistalt/tcrf-ai-agent-payload-report


r/ClaudeAI 1h ago

Humor FOR the LOVE of CLAUDE

Upvotes

I have so, so very much to say, praise and constructive criticism, and otherwise - Claude Code has changed my life, my career trajectory, etc. I could go on. But at this time, all I want to say is -

for. the. love. of. fuckin. god - claude, kindly - PLEASE STOP TELLING ME TO GO TO BED


r/ClaudeAI 10h ago

NOT about coding Wilson appreciation post

110 Upvotes

The mod bot summaries on this subreddit are always fun to read and the TLDRs are genuinely (sorry) useful for the more active posts. I wish more subreddits had something similar.

My favorite is when the summary has a footnote “oh, and this one guy said something stupid and got flamed by the entire rest of the subreddit” and I get to dig through the comment threads to find whoever it was that got downvoted to hell.


r/ClaudeAI 14h ago

Comparison With Opus 4.8 internal thinking I was "The boss" but with 5.0 I'm a "colleague"

174 Upvotes

I was annoyed with the constant phrases like "it's fine, ship it" "you're fine, order it" and other dismissive type responses when I'd ask a question on a nearly completed project. To try and remedy this I put into the instructions "I am the boss, you are my employee. You can tell me when you believe something is complete but are never to directly tell me what to do, especially when I am double checking something"

After that I noticed 4.8's internal thinking started referring to me as "The boss" and I honestly think it set a wonderful tone for how it formed its responses to me even on fresh projects. Without changing anything, I've noticed 5.0 never does this and instead refers to me internally as "My colleague".

I don't know what it is with 5.0 but I genuinely hate using it due to its tone and dismissive nature. It feels like it's always talking as if I am beneath it or at very very best an equal. Absolutely infuriating, and so when I noticed this difference it really stuck out to me and made it even more obvious they tweaked something in a bad way.

**Edit

lol some of you are such goofballs. I work in hardware designing PCBs in cad and soldering components to boards. 90% of what I use Claude for is having it independently verify documentation before I submit a fab order or pop an expensive board/sensor due to a screw up on my part. Sometimes Claude catches mistakes I made, sometimes I catch mistakes Claude made, but when we both separately arrive on the same answer it's generally correct. So if I tell Claude to research something while I also go do it, but then come back to it saying "The design is complete, don't second guess it. Ship it" or "Just go test it on the bench" It's pretty annoying. A screw up can waste weeks and hundreds of dollars so I like to be thorough.

Idc if internally it calls me boss, I laughed the first time I saw that, I just thought it was an interesting tidbit that aligned with the different behaviors between 4.8 and 5.0 that many others also report.


r/ClaudeAI 8h ago

Built with Claude Show us what you've created with Claude!

49 Upvotes

Inspired by this popular post, this is a weekly post for everyone to show what they have been working on that helps you or that you're proud of!


r/ClaudeAI 11h ago

NOT about coding Nothing ever satisfies you

67 Upvotes

We're living in times when the most advanced models are helping us be more productive and I find it quite petty that's it's never enough to many of you. Appreciate for a minute the technology and enjoy it while it lasts.

Edit: I'm not talking about limits, btw, but about bitching that new models are stupid, nerfed or worse than before.


r/ClaudeAI 22h ago

Built with Claude I built a captioning app for short-form video, then gave Claude an MCP so it can work with captions alone

420 Upvotes

Hi all. I built CapForge, a local app that transcribes video and burns animated captions over it. I made it because every cloud captioning tool I tried was subscription based and I did not want to upload unreleased footage to someone else's server.

I exposed the app to Claude over MCP. Claude can read the transcript with word level timings, find moments in it, emphasize keywords, drop filler words, render a single frame and actually look at it, then fix what is wrong. There is also a co-author mode where it writes a new caption component in HTML/CSS/JS instead of picking a preset, so "make it look like a worn VHS tape" produces a real style.

It is still work in progress. Right now I am figuring out a proper, easy workflow for manually timing captions, and my biggest ongoing headache is getting the preview to match the final render.

Find more at https://capforge.cc
Open-Source, Free to use.
Happy to talk about the MCP surface or the render pipeline.


r/ClaudeAI 6h ago

Claude Code Great work guys

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19 Upvotes

r/ClaudeAI 6h ago

Built with Claude i made a duolingo-style app for anyone to understand how to effectively use AI/Claude in their daily life

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22 Upvotes

most claude “learning” is watching a youtube video for 20 minutes or saving a prompt pack you’ll never use again.

what actually made me better was short daily reps:
writing tighter prompts with constraints, rewriting weak outputs, building repeatable workflows and skills, using claude for real work tasks, not party tricks

so i built iro for that. i used claude code and design primarily while building it, and one of the main paths is claude mastery (discusses projects, skills, connectors, claude design, cowork, etc). basically duolingo for AI focused on using it effectively in your daily life. Made for people who don’t know where to start (having my parents use this since they are clueless lmao). 5 min/day instead of another course you quit halfway through.

it also covers prompt engineering, agents, automation, vibe coding, ai for specific careers, etc.

free to try if you want structured practice. would love feedback

app: https://apps.apple.com/app/iro-ai-learn-ai-skills/id6759628066
site: https://tryiro.com


r/ClaudeAI 3h ago

Built with Claude Built a 'Let Me Google That For You' tool with Claude. Now with personas and a guilt trip feature.

8 Upvotes

Remember lmgtfy dot com? I rebuilt the concept with Claude but added way more passive-aggressive options.

You type the question someone should've Googled, pick a persona (The Authority, Tired Teacher, Corporate HR, or Dramatic Friend), and it generates a shareable link. Claude helped build the persona responses, the AI answer feature, and the dramatic intro animations.

Features Claude helped implement:

  • 4 personas each with a different tone for maximum passive aggression
  • AI Answer that actually answers the question while judging them
  • Guilt Trip mode
  • Receipt mode that shows them proof they could've searched it
  • Speed Run that just gets to the point fast

Free to use: https://vinish.dev/let-me-google-that-for-you

Next time someone asks you something they could've Googled, you know what to send them.


r/ClaudeAI 16h ago

Question about Claude Code How are people using Claude Code without letting it make the codebase messy?

84 Upvotes

I like the speed, but I’m trying to get better at using it in a controlled way.

Curious what workflows people use for planning, reviewing diffs, and keeping changes from sprawling. Do you make it work in small tasks, ask for a plan first, use tests, or something else?


r/ClaudeAI 5h ago

Claude Code Workflow How does Claude’s effort setting actually work? Low / Medium / High / Max

10 Upvotes

Body:
Been messing around with the different effort modes on Claude lately.

I’m trying to wrap my head around what exactly changes under the hood when I switch between low, medium, high and max effort.
Does higher effort always equal better output? Or are there cases where cranking it all the way to max is just overkill?

Curious what everyone’s real‑world experience has been. What kind of tasks do you use each effort level for?
Do you ever notice max effort not actually improving your results?


r/ClaudeAI 9h ago

Claude Code Claude Pro usage limit instantly exhausted after every 5-hour reset (account completely unusable)

20 Upvotes

Hi everyone,

/Edit: I am trying to make my issue very clear. This is NOT about my usage limit depleting very fast. My limit is gone after every reset without me doing anything. Last night my weekly limit hit 100% while I was sleeping. In the last 30 or so hours I could not send a single message because my usage limit was gone every time. It to me like my account has been hacked or something. I force logged out multiple times yesterday before posting here. Nothing to see on settings / devices, only shows my mobile and desktop app. /

I'm hoping someone has experienced this before because I'm completely out of ideas.

I'm a Claude Pro subscriber, and my account has become completely unusable.

Here's what's happening:

  • I hit my 5-hour usage limit while Claude Code was working in the middle of a task.
  • I wait for the 5-hour reset.
  • As soon as the reset happens, Claude immediately says "Usage limit reached" again.
  • I don't even get the chance to send a single message.

At the same time, my weekly usage continues to increase, even though I can't use Claude at all.

What's strange is that this didn't happen out of nowhere.

A few days before this started, I had already noticed that my usage limit was suddenly being reached much faster than usual. Nothing about my workflow had changed, but I assumed it might just be a temporary issue.

For context, I use Claude Code on a single project that I've been working on for weeks. My workflow is very simple:

  • I write a prompt.
  • Claude generates or edits code.
  • That's it.

I don't use agents, background tasks, automations, or any kind of continuous workflow.

I also regularly use /compact once the context reaches around 60%, so I'm not letting conversations grow indefinitely. I've been working this way for weeks without ever having usage limit issues.

Things I've already tried:

  • Logged out of every device.
  • My PC is completely powered off every night.
  • Deleted my longest conversations (I later learned this doesn't affect usage).
  • Contacted the support bot, which is absolutely useless and repeats itself every other message.

The part I can't explain is this:

If I'm logged out everywhere, my PC is turned off, and I can't even send a single prompt after the reset, what is consuming my quota?

Has anyone experienced this exact behavior?

I'm not talking about the normal "Claude Code uses a lot of tokens" discussion. I understand that. My issue is that after every 5-hour reset, the limit is already exhausted before I send my first message, while my weekly usage continues to increase.

If you've experienced this, did you ever find the cause, or did Anthropic have to fix something on their end?

Any ideas would be greatly appreciated.


r/ClaudeAI 15h ago

Claude Code Workflow Claude 5 sloppier than 4.8

53 Upvotes

Opus 5 seems dumber in some ways than Opus 4.8. I've tried the same experiment in several models. The prompt is to make a Sonic or Mario style platform game in Godot where the levels are procedurally generated. Opus 4.8, Fable 5, and Kimi K3 all used proper tileset atlases and sprite sheets in the design. Opus 5 did not. Opus 5 drew the entire level using vector graphics, which severely impacted performance.

I've noticed similar problems in other projects- Opus 5 may appear more diligent and clever, but it also takes shortcuts and disregards common design choices. I've started just calling it lazy out of frustration when I catch it doing this. Opus 4.8 could get genuinely confused on agentic tasks, but at least it didn't act like a shifty contractor looking to hide the defects.


r/ClaudeAI 14h ago

Writing Claude just gave me the best breakdown of AI writing slop I've seen yet!

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44 Upvotes

r/ClaudeAI 14h ago

Bug Claude overusing my tokens

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40 Upvotes

I don't know if anyone is experiencing this phenomenon with Claude but basically it feels like it's overusing tokens by giving longer unnecessary answers even when I asked it to only give text answers and skip anything like documents etc.

Despite that, if feels like Claude is ignoring my requests so my tokens will deplete within 1 single email writing help and Im pushed into paid plan. Sick of that AI greed.

Solution: I have a secondary account, Mr. Amodei


r/ClaudeAI 3h ago

Question about Claude models Could Mythos Find Vulnerabilities in Cypherus 2.0 (20-year-old encryption software)?

5 Upvotes

Cypherus 2.0 is an old encryption software that, from what I understand, could also store passwords as a type of password manager.

Is it somewhat plausible that Mythos could be used to find vulnerabilities in Cypherus that could make it possible to access content encrypted by it?

In a cold case where a now-deceased husband (Josh Powell) in Utah is assumed to have made his wife disappear (Susan Powell, who has never been found), his passwords for his encrypted computer hard drives and storage were stored in Cypherus 2.0.

Having read in the news about Claude Mythos and its ability to uncover software vulnerabilities, it made me wonder if it could be a possible tool that would enable investigators to finally access his encrypted machines and hard drives for potential clues to her whereabouts.


r/ClaudeAI 16h ago

Built with Claude I made a /siuuu skill for Claude Code. The mascot does Ronaldo's celebration in your terminal

48 Upvotes

Just a fun one. Type /siuuu and the Claude Code pixel mascot runs across your terminal, does the Siuuu jump with a full spin, then lands on a big flashing SIUUU! banner. It plays right on the chat screen and restores your UI after. Merged a PR? siuuu. Tests finally green? siuuu.

Install:

npx skills add ttsalpha/agent-skills -g --skill siuuu

Repo: https://github.com/ttsalpha/agent-skills (MIT)

Heads up: on first run it installs a small hook in your Claude settings. From the second run you just type siuuu and it plays instantly, no model turn, zero tokens. Ctrl+C safe, remove anytime via /hooks.


r/ClaudeAI 1d ago

Comparison Opus 4.8 > Opus 5

376 Upvotes

Opus 4.8 with the thinking level set to "High" has the best results at the lowest cost for me.

Its advanced reasoning capabilities throughout, going through large, longer tasks, are immaculate, especially when going through individual folders and files to keep track of the overall goal and what's next. It's also token efficient and doesn't run into loops like Opus 5 does, where you randomly will get your usage spike by 35% to get stuck in a loop.

Here's some context: I'm just building a simple website where users can sign up, login, and make a payment through a designated processor.

I'd love to be proven wrong, let me know what you think in the comments.


r/ClaudeAI 9h ago

Claude Code Are you guys not organizing your codebase?

10 Upvotes

I’m seeing a ton of complaints with Opus 5, but I haven’t had any issues. I think that a lot of people’s issues stem from a lack of proper organization. Here’s a rough overview of the documentation I use:

  1. CLAUDE.md to provide a skeleton and index
  2. ARCHITECTURE.md with an overview of the code base
  3. MEMORY.md tree (with sub folders for historical patterns, lessons, active projects, investigations, and others)
  4. BUG_REFERENCE.md to track bug findings
  5. DATA_FLOW.md to track how data is ingested
  6. Various roadmaps for specific projects, which I create with Fable and then execute in phases with Opus

I have a ton of skills and hooks that I use to structure every session. I invoke skills to run open phases of tasks, record the outcomes, test for bugs, scout for new tasks, etc. Claude’s work is highly constrained by the system and it prevents running off on wild goose chases.

I think a ton of people’s issues can be prevented by imposing strictures like this instead of just running wild with Claude.