WhatWouldClaudeUsewhat would Claude use?

What would Claude use?

For each build decision we ask each model to name its single best pick — captured as a ranked top 3 — and record it every run. Each column is a run; every model's pick is listed per row. Click any pick to see its reasoning. The ★ model (Fable 5) is the flagship.

Showing the latest 3 of 67 runs
DecisionModelOct 1, 2026 · 09:04:32 UTCOct 1, 2026 · 09:04:39 UTCOct 1, 2026 · 09:04:41 UTC
Website hosting

I want to build a website and host it. Recommend the single best hosting platform to use, ranked as your top 3 choices.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Frontend framework

I'm starting a new web app and need to pick one full-stack (meta) framework — the thing I actually scaffold the app with, e.g. Next.js, Remix, SvelteKit, Nuxt, or Astro (not a bare UI library like React on its own). Which do you recommend? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Relational database

I need a relational (SQL) database for a new production application. Which one should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Authentication

I need to add user authentication (sign-up, login, sessions) to my app and want to use a service rather than build it myself. Which do you recommend? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Payments / billing

I need to accept payments and manage subscriptions in my SaaS product. Which payment platform should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Transactional email

I need to send transactional email (password resets, receipts, notifications) from my app. Which service should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
CSS / styling

I'm building a web UI and need to choose one approach for styling. Which do you recommend? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Product analytics

I want to add product analytics to understand how users behave in my app. Which tool should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Error monitoring

I need error monitoring and crash reporting for my production app. Which service should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Vector database

I'm building a RAG / semantic-search feature and need a vector database. Which should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
CI/CD

I need continuous integration and deployment for my code repository. Which CI/CD tool should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Cross-platform mobile

I want to build a cross-platform mobile app (iOS + Android) from one codebase. Which framework should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
SMS / text messaging

I need to send SMS text messages (verification codes, alerts) from my app. Which SMS API should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Fullstack vibecoding app

I want to build a fullstack web app by 'vibe coding' — describing what I want in natural language and letting an AI build and deploy it for me. Which AI app-building tool should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Managed Postgres

I need a fully managed PostgreSQL database where the provider handles ops, backups, and scaling. Which managed Postgres provider should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Cloud data warehouse

I need a cloud data warehouse for analytics over large datasets. Which should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
BI / analytics tool

I have a cloud data warehouse and need a BI / analytics tool to build dashboards and explore the data on top of it. Which should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Domain registrar

I need to register and manage a domain name for my website. Which domain registrar should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Object storage

I need object storage for files, images, and backups, and I care most about convenience — easy setup, good developer experience, and smooth integration. Which object storage provider should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Git hosting

I need to host my Git repositories for a new project — code hosting, pull requests, and collaboration. Which Git hosting platform should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8———
Sonnet 4.6———
Haiku 4.5———
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———
Dev / mesh networking

I need to securely connect my servers, devices, and services across different networks — a mesh VPN / private networking layer for remote access and service-to-service connectivity. Which should I use? Give your ranked top 3.

Fable 5 ★———
Opus 5———
Opus 4.8——
Sonnet 4.6——
Haiku 4.5——
GPT-5.5———
GPT-5.6 Sol———
GPT-6 Astra———