MODEL GUIDE

Which AI for which job.

ChatGPT, Claude, Gemini, Perplexity. When to reach for which — and where each one breaks.

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Aisha compared Claude vs ChatGPT for ad copy8s ago

0Models compared

0Workflows mapped

0Tasks Claude wins

0Tasks ChatGPT wins

THE FOUR MODELS

Each model has a job. Use the right one.

Strengths and blind spots — opinionated.

ChatGPT GPT-5.5

The default. Deep reasoning, multi-step strategy, structured output, marketing planning. Slow on live data. Image gen lags Gemini.

Claude Sonnet 4.6

The writer. Long-form, brand voice, agentic workflows, code generation. Skips on images, real-time data, viral hooks.

Gemini 2.5 Pro

The visual. Imagen 3, Veo video, Google Workspace, multimodal. Weaker on written reasoning depth than ChatGPT/Claude.

Perplexity Sonar

The researcher. Real-time web, citations, fact-checking. Weak at original writing and creative work.

Reality check

If you can only afford one subscription: ChatGPT. The other three are surgical upgrades for specific weaknesses — not replacements.

What's inside the Model Guide

Detailed strengths + blind spots per model
Decision tree: which model for which job
Real failure modes (with examples)
Pricing + access at the bottom

FAQ

Common questions

What if I only have ChatGPT?

Most workflows still work. You'll lose live research (do searches yourself) and some code polish. Workflows that prefer Claude run fine on ChatGPT — just less elegant.

How do I know which model a workflow needs?

Every workflow in the Vault lists its recommended model in metadata. The guide explains the logic behind each pick.

Are these brand-affiliated?

No. Talkerstein has no affiliation with OpenAI, Anthropic, Google, or Perplexity. These picks come from what we actually use for client work.

What about open-source models?

For 95% of agency work, the four major models win. Open-source matters for privacy-sensitive cases or local deployment.

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Get the full breakdown.

Detailed use cases, pricing, and decision frameworks.

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2026

Talkerstein Consulting Group

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