Fable 5.1 launched yesterday. Your startup could go to market by Sunday.

It has never been a better time to build. That was true last week. But with the launch of Fable 5.1, that message got louder yesterday.

The much-awaited drop came with 75% lower cache reads and up to 45% cheaper agentic work, on what promises to be Anthropic’s best model yet. The cost of trying an idea has been falling for two years, and this was another step down.

Which leaves one question: what are you doing between now and Sunday? And if the answer isn’t building your startup, why not?

Fable 5.1 is here. You’re reading about it; you’re curious about it. Put that curiosity into building your tech startup.

Here’s a plan. It’s Wednesday. If you don’t have an idea already, decide today, validate Thursday, build Friday, ship Saturday, go to market Sunday. One phase per day, and under each we’ll recommend the tools you could use. Everything here is a tool we’ve seen recommended by devs, indie founders, and small teams.

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Wednesday — Decide

Things to get done: one idea, one sentence, one name, one domain.

Don’t have an idea? Your product is usually hiding in an unresolved problem. Notice what you work around: the tab you keep reopening, the step you do manually every week, the thing you complain about and then forget you complained about. Some of the biggest companies in the world started as the solution to someone’s smallest annoyance.

Do today:

1. Write down three things you worked around this week: small annoyances or problems.
2. Write them as one positive sentence: [who] can now [do what] without [the painful thing]. For example: people with full-time jobs can now keep a pet without struggling to find a sitter every time they travel.
3. Now work out what would make it possible. What would have to exist? In the example, a booking layer that finds a vetted sitter without the three-day group-chat hunt.
4. Give Claude 20 minutes to argue against it. Ask it to be the customer who says no, maybe an investor who’s bored. Whatever survives is worth building.
5. Ask Claude for help in generating a list of names for your startup. Look for ones that clearly say what you do; for example, if tech is at the core, put “tech” in there; if you’re building an AI solution, add that. Then lock the domain in right away. And if there’s tech in the name and at the core, get a .tech domain
   1. We even sponsor domains for 10-years if you’re a tech founder with a really promising startup idea. Scroll all the way down to know how you can apply for one.
6. Ask Claude to write an ideal customer profile for your idea: who it’s for, what they already use, what would make them switch. Then ask where those people spend time: which subreddits, newsletters, Discords, communities. Those are your distribution channels. 

Tools:

• Claude / ChatGPT / Gemini: LLM assistants for idea validation, drafting target user profiles, generating product names, and stress-testing concepts.

• Perplexity: Conversational search engine for real-time market research and finding existing competitors.

• Namify: AI domain and business name generator that creates short, brandable company names and checks for domain name availability.

Thursday — Validate

Things to get done: a one-pager that introduces the idea to a few people in your circle.

You haven’t written any code yet, and you don’t need to. A page that states the problem clearly and shows how your idea solves it will tell you more than a month of thinking about it.

Do today

1. Build a one-pager. Not a brochure: the problem in a sentence, your solution in three, and a way for someone interested to say so, a comment box or just a quick IM.
2. Send it to five or ten people you know who are in that situation. People you know is fine. You’re not running a study; you’re checking that the problem lands.
3. Don’t wait on responses to keep going. If nobody replies by Friday morning, build anyway. Early feedback is great but if you have conviction in your ideas, don’t slow down. 

Tools

• Lovable: AI web builder that turns prompt descriptions into interactive web apps.

• v0.dev: Generative UI tool by Vercel that creates React components and Tailwind CSS interfaces.

• Framer: Visual site builder with AI web generation and instant publishing.

• Tally: No-code form builder for creating waitlists, surveys, and lead capture forms.

• PostHog: Product analytics suite for tracking page views, visitor funnels, and click behavior.

Friday — Build

Things to get done: an MVP, the smallest working version of your idea.

A note on what follows: we’re not going to tell you how to build your product. You’re the builder; that’s your domain. We’ll just point to a few tools we’ve seen discussed the most in dev, builder, and founder circles. Especially ones that could work for any startup today.

This is the day that used to take a quarter; now you can test, iterate, and go live all in a day.

Do today

1. Build the MVP. The simplest working version of your idea (which, with agentic coding, could be very close to what the final version looks like).  This helps you get early feedback and build signals that point to your idea’s viability. Don’t get hung up on vanity features; focus on functionality.
2. Add accounts and a database if your product needs to remember anything between visits: a saved list, a history, a setting. If it doesn’t, skip this entirely; plenty of good first products have no login at all.
3. If you’re charging, set up payments today, so you can actually take money on Sunday instead of collecting interest you can’t convert. Subscriptions if it’s ongoing, one-time if it isn’t.

Tools

• Cursor: AI-powered code editor for writing, editing, and debugging full codebase context.

• Claude Code: Command-line agent that edits local files, runs terminal commands, and builds features directly in your repository.

• Bolt.new: In-browser development platform for building and deploying full-stack web apps from text prompts.

• ShipFast: Next.js boilerplate equipped with pre-built auth, payments, database integrations, and SEO defaults.

• Supabase: Open-source backend providing managed PostgreSQL databases, user auth, and file storage.

• Convex: Reactive serverless backend with real-time state sync and database storage.

• Stripe: Payment infrastructure for handling credit cards, checkout flows, and recurring subscriptions.

• Resend: Transactional email API for sending onboarding emails, password resets, and account alerts.

Saturday — Ship

Things to get done: connect your domain; set up analytics, and get it ready for traffic you don’t know.

Do today:

1. Get it hosted. Push the code; let the platform handle HTTPS and the build.
2. Connect your domain, so it lives on your .tech rather than a platform subdomain.
3. Add analytics and track one thing: did someone do the main action? Everything else is noise this week. DataFast is the quickest to get in, and it’ll tell you on Monday which channel actually worked.
4. Generate onboarding emails that go out when someone signs up. Make them personal if you like.
5. Generate launch posts and set up an agent to post them at your chosen go-live time for Sunday.

Tools

• Vercel: Cloud platform for hosting frontend applications and serverless APIs with automated GitHub deployments.

• Netlify: Web host for deploying static sites, edge functions, and web apps.

• Railway: Infrastructure platform for hosting backend APIs, microservices, databases, and Docker containers.

• Render: Unified cloud hosting for static websites, web apps, background workers, and PostgreSQL databases.

• Sentry: Real-time error monitoring tool that tracks runtime bugs and performance bottlenecks.

• Better Stack: Uptime monitoring and incident tracking platform with automated status alerts.

• DataFast: Revenue-focused analytics tool that attributes paying customers directly to traffic channels.

Sunday — Go-to-market

Things to get done: try to reach a hundred people who didn’t know this existed on Wednesday and have seen it.

This is the day our last piece was about. Channel beats volume. Post where Wednesday’s distribution list said the people are, not everywhere.

Do today

1. Put it up on the launch sites. Product Hunt, Show HN, BetaList — pick two or three and submit. There’s no perfect launch day, and waiting for one is how products stay unlaunched.
2. Go to the channels you identified on Wednesday and post it there. Lead with the problem, not the product: the thing you kept working around, and what you built about it.
3. Tell your own story. You had an annoyance on Wednesday and a product by Sunday; that’s more interesting than any feature list, and it’s the version people share.
4. Email the people who saw Thursday’s page. They already know the problem; now there’s something to use. If it’s ten people, send it yourself.
5. Reply to everything. Today is for conversations, not broadcasts.

Tools you can use:

• Typefully: Social media platform for writing, scheduling, and cross-posting content to X and LinkedIn.

• Product Hunt: Daily launch directory for showcasing new software products to early adopters.

• Show HN: Hacker News channel for sharing tech projects directly with developers.

• Resend Broadcasts: Email tool for sending launch newsletters and product updates to your subscriber list.

• Loops: Email automation service designed for SaaS product lifecycle emails and marketing campaigns.

• Indie Page: Portfolio tool for building a single landing page that showcases all your startup projects.

Monday morning

You go back to work. Or work on your idea full-time.

Your idea is built, your product is live, it’s out in three or four places your customers actually read, the posts are scheduled, and the analytics are collecting answers in the background. Somebody you’ve never met might sign up on Tuesday. That’s the whole point: the thing runs in the background now, and you spend your time improving and growing it instead of imagining it.

 

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It doesn’t have to be this plan

It’s not always a five-day-and-done sprint. We’ve seen it happen enough when the product can be conceived Saturday morning, live by Sunday afternoon. Maybe it needs hardware and a prototype, so it takes a lot longer.

We are not jumping on the “excuses are gone” wagon. No one is putting their ideas away because they couldn’t be bothered. There are real barriers like time, capital, and resources that get in the way. However, they are lowering by the day, and the launch of Fable 5.1 was another reminder of that.

Start tomorrow, start next Wednesday, be adventurous and start on a Monday.  The days aren’t the point. The point is that every one of these phases, which used to be a hire or a month, could now be an afternoon with AI.

Use Claude, don’t use Claude. Open-source it if you want to.  Just build that idea, because there has never been a better time.

For those of you who scrolled down, to get a sponsored .tech domain for 10-years, go to https://startup.tech. We are sponsoring .tech domains for 10 years for founders who are building great tech ideas. And maybe that’s you.

This program is also extended to leading accelerators and incubators, and we’ll share more about the great work we’ve been doing together.