What is the difference between Claude Sonnet 3.6 (2022-10-22) and GPT-5 Codex?

Claude Sonnet 3.6 (2022-10-22) is developed by Anthropic while GPT-5 Codex is developed by OpenAI. You can compare their actual outputs across 50 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 3.6 (2022-10-22) or GPT-5 Codex?

It depends on your use case. Claude Sonnet 3.6 (2022-10-22) and GPT-5 Codex each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 50 challenges so you can judge which fits your needs best.

How can I compare Claude Sonnet 3.6 (2022-10-22) and GPT-5 Codex on Rival?

This page shows a side-by-side comparison of Claude Sonnet 3.6 (2022-10-22) and GPT-5 Codex across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Sep 2025

Claude Sonnet 3.6 (2022-10-22)vsGPT-5 Codex

GPT-5 Codex is the newer model, released after Claude Sonnet 3.6 (2022-10-22).

Claude Sonnet 3.6 (2022-10-22) and GPT-5 Codex compared across 50 shared prompts
Spec	Claude Sonnet 3.6 (2022-10-22)	GPT-5 Codex
Input price	$3/M tokens	—
Output price	$15/M tokens	—
Context window	200K tokens	—
Free API (OpenRouter)	No	No
Released	Jun 2024	Sep 2025
SWE-bench Verified	49.0%	74.5%