What is the difference between Claude 3 Sonnet and Mercury?

Claude 3 Sonnet is developed by Anthropic while Mercury is developed by Inception. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Sonnet or Mercury?

It depends on your use case. Claude 3 Sonnet and Mercury each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 13 challenges so you can judge which fits your needs best.

How much does Claude 3 Sonnet cost compared to Mercury?

Claude 3 Sonnet costs $3/M input tokens and Mercury costs $10/M input tokens. Claude 3 Sonnet is $7.00/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 3 Sonnet and Mercury on Rival?

This page shows a side-by-side comparison of Claude 3 Sonnet and Mercury 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 Jun 2025

Claude 3 SonnetvsMercury

Claude 3 Sonnet is cheaper than Mercury at $3/M vs $10/M input tokens.

Claude 3 Sonnet and Mercury compared across 13 shared prompts
Spec	Claude 3 Sonnet	Mercury
Input price	$3/M tokens	$10/M tokens
Output price	$15/M tokens	$10/M tokens
Context window	—	32K tokens
Free API (OpenRouter)	No	No
Released	Mar 2024	Jun 2025
HumanEval	73.0%	90.0%