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AI Model Comparison.

Pick any two frontier models. See context, pricing, modality, and a workload-based monthly cost side-by-side. Snapshot updated each quarter.

Model A

Frontier

Model B

Frontier

Side-by-side

	GPT-4o	Claude Sonnet 4
Vendor	OpenAI	Anthropic
Tier	Frontier	Frontier
Context window	128K tokens	200K tokens
Input price	$2.50 / 1M	$3.00 / 1M
Output price	$10.00 / 1M	$15.00 / 1M
Knowledge cutoff	Oct 2024	Apr 2025
Modality	Text + Image + Audio	Text + Image
Monthly cost*	$225	$300

*Workload assumed: 50M input + 10M output tokens/month. Use our AI Cost Calculator for your actual numbers.

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In-depth comparisons

ChatGPT Plus vs ChatGPT Pro (2026)Plus is enough for most operators. Pro is for people hitting limits every day or leaning hard on Codex and deep research.GPT-4o vs Claude Sonnet 4These are the two primary workhorses. GPT-4o for breadth and multimodal. Claude Sonnet for writing and long-context.OpenAI API vs Gemini API (2026)OpenAI is still the broader, safer default for production apps. Gemini becomes attractive when price, context window, or Google ecosystem gravity dominates.Claude vs ChatGPT (2025)Both are excellent. They are excellent at different things.