ChatGPT vs Claude (2025): Which AI is better for Doctors?

Last reviewed: 2025-12-19 · Reviewed by

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At a Glance

Who is it for?

ChatGPT (GPT-4):General

Claude (3.5 Sonnet):General / Professional

Why choose ChatGPT (GPT-4)?

  • **Tool Use**: Native web search, image generation (DALL-E), and data analysis.
  • **Ecosystem**: Superior mobile app, voice mode, and 'Custom GPTs'.
  • **Speed**: Generally faster inference for quick queries.
  • **Versatility**: Better at code, images, and creative tasks.

Why choose Claude (3.5 Sonnet)?

  • **Context Window**: Can read massive documents (e.g. 100-page guidelines) with high accuracy.
  • **Tone**: Writes in a more natural, human, and less 'robotic' clinical style.
  • **Safety**: Built with 'Constitutional AI', often reducing hallucinations.
  • **Reasoning**: Often outperforms on complex nuance and logic tasks.

Feature Comparison

CapabilityChatGPT (GPT-4)Claude (3.5 Sonnet)
Writing StyleVerbose / FormulaicNuanced / Professional
AnalysisGoodExcellent for long texts
CapabilitiesMultimodal (Voice/Image)Text/Code Specialist

In-Depth Analysis

Overview

For doctors, Claude (Anthropic) is gaining a reputation as the "Thinking Clinician's AI." Its architecture favors large context windows (reading whole books/guidelines at once) and producing writing that sounds less like a machine. It is excellent for summarizing long medical documents or drafting sensitive letters.

ChatGPT (OpenAI) remains the "King of Versatility." If you need to search the web for a drug price, generate an image for a presentation, or use voice mode to dictate, it is superior.

Key Differences

Use ChatGPT for tasks (searching, creating images, voice). Use Claude for thinking (reasoning, writing, summarizing).

Looking for a faster way?

While ChatGPT (GPT-4) and Claude (3.5 Sonnet) are powerful tools, iatroX offers a free, AI-driven alternative focused specifically on rapid UK guideline retrieval and exam prep.

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Use-Cases

Drafting a Patient Letter

When to choose ChatGPT (GPT-4)

  • Good, but often uses flowery AI language ('I hope this finds you well').

When to choose Claude (3.5 Sonnet)

  • **Winner.** Captures an empathetic, professional tone significantly better.

Summarising a PDF Guideline

When to choose ChatGPT (GPT-4)

  • Good.

When to choose Claude (3.5 Sonnet)

  • **Winner.** Claude's large context window handles massive documents with fewer errors.

Visualizing a Diagram

When to choose ChatGPT (GPT-4)

  • **Winner.** Can generate images or charts.

When to choose Claude (3.5 Sonnet)

  • Cannot generate images.