What is the difference between Claude Sonnet 4.5 and GPT-3.5 Turbo?

Claude Sonnet 4.5 is developed by Anthropic while GPT-3.5 Turbo is developed by OpenAI. Claude Sonnet 4.5 has a 200K token context window vs GPT-3.5 Turbo's 16K. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 4.5 or GPT-3.5 Turbo?

It depends on your use case. Claude Sonnet 4.5 and GPT-3.5 Turbo each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 42 challenges so you can judge which fits your needs best.

How much does Claude Sonnet 4.5 cost compared to GPT-3.5 Turbo?

Claude Sonnet 4.5 costs $3/M input tokens and GPT-3.5 Turbo costs $1.5/M input tokens. GPT-3.5 Turbo is $1.50/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Claude Sonnet 4.5 and GPT-3.5 Turbo on Rival?

This page shows a side-by-side comparison of Claude Sonnet 4.5 and GPT-3.5 Turbo 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 4.5vsGPT-3.5 Turbo

GPT-3.5 Turbo is cheaper than Claude Sonnet 4.5 at $1.5/M vs $3/M input tokens.

Claude Sonnet 4.5 and GPT-3.5 Turbo compared across 42 shared prompts
Spec	Claude Sonnet 4.5	GPT-3.5 Turbo
Input price	$3/M tokens	$1.5/M tokens
Output price	$15/M tokens	$2/M tokens
Context window	200K tokens	16K tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Sep 2025	Mar 2022