karozi

I Mapped the Opus 4.7 Release to Your Role, Goals, and Real Workflows

Opus 4.7 Cheat Sheet for AI Learners, Writers, Knowledge Workers, Vibe Coders & System Builders A read for builders, PMs, and anyone who refuses to ship without thinking.

TL;DR

Anthropic shipped Claude Opus 4.7 on April 16, 2026. Same sticker price at $5/$25 per million tokens, but a new tokenizer makes the real cost up to 35% higher on code-heavy prompts. Three API changes can break existing code: thinking.budget_tokens, temperature, and top_p now return 400 errors, and reasoning traces default to hidden. A new xhigh effort tier sits between high and max, Claude Code defaults to it, and mobile push notifications arrived in Claude Code 2.1.110. SWE-bench Verified hit 87.6% in vendor tests, but Terminal-Bench 2.0 regressed versus GPT-5.4 and r/ClaudeAI users report consumer Claude.ai following instructions worse than 4.6. This post translates the marketing claims, the migration guide, and the Reddit rage into what changes

karozi

Discounts for Premium Members (Q2 2026)

Your PwA subscription pays for itself in tool discounts and credits. A read for builders, PMs, and anyone who refuses to ship without thinking.

Updated April 2026· Actively maintained

TL;DR: Product with Attitude is the only newsletter discount bundle that combines AI builder tools, community‑made tools, and curated newsletter discounts for $11/mo instead of inflated enterprise pricing. Every discount is for a hands‑on‑tested product (not just a paid partnership) or a tool built by PwA community members, backed by editorial deep‑dives.

I’ve been stacking valueuntil Premium membership is a no-brainer and not subscribing means leaving money on the table.

karozi

Everything I Can Offer You In Q2.

One year of building in public, 17K-member AI newsletter community, three built-in products, and discounts that make your Substack paid subscription a no-brainer. A read for builders, PMs, and anyone who refuses to ship without thinking.

When I started Product with Attitude 13 months ago, the goal was simple: learn in public by writing. Push further into AI product building. Research harder.

I was convinced I was writing for Product Managers, because who else would read this?

And then the first REAL writer joined our Community Chat.

karozi

I Tested Atoms, Lovable, and Replit. One of Them Solves the Problem That Kills Most Apps.

A test-driven review of Atoms.dev, the multi-agent AI platform for solo founders. Includes Atoms vs Lovable vs Replit comparison and a live SEO/AIO/GEO experiment. A read for builders, PMs, and anyone who refuses to ship without thinking.

The failure data for vibe coded apps is brutal:

• #1 killer is the wrong audience: CB Insights analyzed 150+ startup post-mortems; 42% failed because there was no market need.
• **#2 killer is wrong positioning:**users are unable to understand what the product does, can’t tell it apart from competitors, or simply can’t find it.
• **#3 killer is wrong features.**Or so many of them, that the product becomes confusing for new users.

karozi

I Built a Claude Cowork Loop That Improves Itself. Here's the Exact Setup.

Anthropic slipped Cowork’s most interesting behavior into a support article. I turned it into a Karpathy-inspired system that gets smarter without writing a line of code. A read for builders, PMs, and anyone who refuses to ship without thinking.

TL;DR Cowork Self-Improving Loop = Karpathy Auto-Research pattern + recurring tasks.

Somehow, Anthropic managed to hide Cowork’s best kept secret in a support article about recurring tasks.

Very few people seem to know about it, and I haven’t seen anyone intentionally building on top of it.

karozi

I Built a Claude Cowork Loop That Improves Itself. Here's the Exact Setup.

Anthropic slipped Cowork’s most interesting behavior into a support article. I turned it into a Karpathy-inspired system that gets smarter without writing a line of code. A read for builders, PMs, and anyone who refuses to ship without thinking.

TL;DR Cowork Self-Improving Loop = Karpathy Auto-Research pattern + recurring tasks.

Somehow, Anthropic managed to hide Cowork’s best kept secret in a support article about recurring tasks.

Very few people seem to know about it, and I haven’t seen anyone intentionally building on top of it.

karozi

What AI Builders Are Shipping in the PwA Community Right Now

Product with Attitude is evolving from newsletter to builder lab. Here’s the new creator showcase format spotlighting what this AI community ships. A read for builders, PMs, and anyone who refuses to ship without thinking.

I can’t keep up anymore. There’s so much being built inside this community that deep dives on every project stopped being realistic weeks ago.

It’s a beautiful problem to have.

This publication has evolved into something bigger than a newsletter.

karozi

Save Credits in Perplexity Computer: Advanced Guide, Part 2 (2026)

How to cut Perplexity Computer credit costs by 50% with thread management, scripting, and tiered automation. Tested workflow patterns for agentic AI builders in 2026. A read for builders, PMs, and anyone who refuses to ship without thinking.

It took me less than a month to burn through 45,000 Perplexity Computer credits.

It wasn’t accidental; I was deliberately stress-testing every workflow I could think of.

Vibe coding projects, visualizations, content pipelines, SEO audits.

karozi

Your AI Agents Are Engineers Now. Manage Them Like It.

AI agents fail when management fails. Define-Deliver-Drive helps you manage agents like human teams: clear specs, WIP limits, and a delegation ladder. A read for builders, PMs, and anyone who refuses to ship without thinking.

The moment you add AI agents to your workflow, you’re no longer just a builder.

The creative maker part of the work evolves into something that looks a lot like engineering leadership.

Because it is.

karozi

Your AI Agents Are Engineers Now. Manage Them Like It.

AI agents fail when management fails. Define-Deliver-Drive helps you manage agents like human teams: clear specs, WIP limits, and a delegation ladder. A read for builders, PMs, and anyone who refuses to ship without thinking.

The moment you add AI agents to your workflow, you’re no longer just a builder.

The creative maker part of the work evolves into something that looks a lot like engineering leadership.

Because it is.