Build With Shawn free guide

OpenAI vs Claude: which model should you use?

A simple field guide for founders, operators, and creators who want to pick the right model without memorizing every benchmark.

Simple rule: use the cheaper fast model for drafts and repeated work. Use the stronger model when the task is ambiguous, high-value, or needs careful reasoning.

The short version

Use case Start here Why
Writing, rewriting, summaries, customer emails Claude Sonnet or OpenAI mini/standard models Fast enough, strong language quality, lower cost for daily work.
Complex strategy, coding, agents, messy workflows OpenAI GPT-5.2 / GPT-5 or Claude Opus / Sonnet Better for multi-step reasoning, debugging, and planning.
Large documents, research packs, long transcripts Claude long-context models or OpenAI long-context models Both can handle big context windows; test with your real files.
Cheap high-volume classification or extraction Haiku / mini / nano style models Use small models when the task is clear and repeatable.

How to think about OpenAI

Best for

  • Agent workflows with tools and structured outputs.
  • Coding, debugging, app-building, and automation logic.
  • Tasks where you want control over reasoning effort.

Model ladder

  • GPT-5.2 pro: stronger, more precise responses for high-value work.
  • GPT-5.2: strong workhorse for coding, agents, and business tasks.
  • GPT-5 mini / nano: cheaper repeated tasks, extraction, tagging, drafts.

How to think about Claude

Best for

  • Clear writing, rewriting, analysis, and long-form documents.
  • Reading a lot of context and turning it into useful structure.
  • Thoughtful business, product, and content feedback.

Model ladder

  • Opus: hardest reasoning and deep coding.
  • Sonnet: best balance of intelligence, speed, and price.
  • Haiku: fastest and cheapest for simple repeated jobs.

My practical workflow

  1. Draft with a fast model. Use cheaper models for first drafts, outlines, extraction, and simple transformations.
  2. Upgrade only when stuck. Move to GPT-5.2, GPT-5, Claude Opus, or Claude Sonnet when the task needs reasoning.
  3. Keep the prompt stable. Test the same prompt on two models before deciding which is better.
  4. Judge by output, not vibes. The winning model is the one that saves time or creates a better result for your exact workflow.

Decision cheat sheet

If you need... Try...
A client email, landing page rewrite, or content polish Claude Sonnet first, then compare with OpenAI standard/mini.
A no-code automation plan or API workflow map OpenAI GPT-5.2 or Claude Sonnet.
A difficult code or agent debugging session OpenAI GPT-5.2 pro or Claude Opus.
Thousands of simple rows to classify Haiku, mini, or nano models.

Prompt to compare models

Paste the same prompt into two models:

You are helping me choose the best model for this workflow. Complete the task, then score your output from 1-10 on accuracy, usefulness, clarity, and how much editing I would need before using it.

Sources checked May 15, 2026: OpenAI API model comparison docs and Claude API model overview docs. Model names, prices, and limits change; always check the official docs before building production systems.

Made by Shawn Pan. Build With Shawn.