What is the difference between Claude Opus 4.8 and Gemini 2.5 Pro Experimental?

Claude Opus 4.8 is developed by Anthropic while Gemini 2.5 Pro Experimental is developed by Google AI. Claude Opus 4.8 has a 1.0M token context window vs Gemini 2.5 Pro Experimental's 1.0M. You can compare their actual outputs across 42 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4.8 or Gemini 2.5 Pro Experimental?

It depends on your use case. Claude Opus 4.8 and Gemini 2.5 Pro Experimental 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 Opus 4.8 cost compared to Gemini 2.5 Pro Experimental?

Claude Opus 4.8 costs $5/M input tokens and Gemini 2.5 Pro Experimental costs $1/M input tokens. Gemini 2.5 Pro Experimental is $4.00/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 Opus 4.8 and Gemini 2.5 Pro Experimental on Rival?

This page shows a side-by-side comparison of Claude Opus 4.8 and Gemini 2.5 Pro Experimental 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 May 2026

Claude Opus 4.8vsGemini 2.5 Pro Experimental

Gemini 2.5 Pro Experimental is cheaper than Claude Opus 4.8 at $1/M vs $5/M input tokens.

Claude Opus 4.8 and Gemini 2.5 Pro Experimental compared across 42 shared prompts
Spec	Claude Opus 4.8	Gemini 2.5 Pro Experimental
Input price	$5/M tokens	$1/M tokens
Output price	$25/M tokens	$2/M tokens
Context window	1.0M tokens	1.0M tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	May 2026	Mar 2025