What is the difference between Claude Opus 5 and Gemini 3.1 Flash Lite?

Claude Opus 5 is developed by Anthropic while Gemini 3.1 Flash Lite is developed by Google AI. Claude Opus 5 has a 1.0M token context window vs Gemini 3.1 Flash Lite's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 5 or Gemini 3.1 Flash Lite?

It depends on your use case. Claude Opus 5 and Gemini 3.1 Flash Lite each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Claude Opus 5 cost compared to Gemini 3.1 Flash Lite?

Claude Opus 5 costs $5/M input tokens and Gemini 3.1 Flash Lite costs $0.25/M input tokens. Gemini 3.1 Flash Lite is $4.75/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 5 and Gemini 3.1 Flash Lite on Rival?

This page shows a side-by-side comparison of Claude Opus 5 and Gemini 3.1 Flash Lite 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.

What is the difference between Claude Opus 5 and Gemini 3.1 Flash Lite?

Claude Opus 5 is developed by Anthropic while Gemini 3.1 Flash Lite is developed by Google AI. Claude Opus 5 has a 1.0M token context window vs Gemini 3.1 Flash Lite's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 5 or Gemini 3.1 Flash Lite?

It depends on your use case. Claude Opus 5 and Gemini 3.1 Flash Lite each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Claude Opus 5 cost compared to Gemini 3.1 Flash Lite?

Claude Opus 5 costs $5/M input tokens and Gemini 3.1 Flash Lite costs $0.25/M input tokens. Gemini 3.1 Flash Lite is $4.75/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 5 and Gemini 3.1 Flash Lite on Rival?

This page shows a side-by-side comparison of Claude Opus 5 and Gemini 3.1 Flash Lite 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.

Claude Opus 5 vs Gemini 3.1 Flash Lite: Which Is Better?

Updated Jul 2026

Our Verdict

Claude Opus 5

Gemini 3.1 Flash LiteRunner-up

No community votes yet. On paper, Claude Opus 5 has the edge — bigger model tier, newer.

Gemini 3.1 Flash Lite is 17x cheaper per token — worth considering if cost matters.

Too close to call

What do Claude Opus 5 and Gemini 3.1 Flash Lite say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude Opus 5

Input

$5.00

Output

$25.00

Gemini 3.1 Flash Lite

Input

$0.25

20× cheaper

Output

$1.50

17× cheaper

Gemini 3.1 Flash Lite is cheaper on both — 20× input, 17× output

Writing DNA

Style Comparison

Similarity

66%

Claude Opus 5 uses 1.7x more emoji

Claude Opus 5

Gemini 3.1 Flash Lite

54%Vocabulary59%

21wSentence Length17w

0.40Hedging0.29

3.9Bold5.5

1.9Lists3.3

0.02Emoji0.00

0.71Headings0.93

0.05Transitions0.11

Based on 27 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude Opus 5 vs Ox AlphaNew provider

Gemini 3.1 Flash Lite vs MiniMax M3New provider

Claude Opus 5 vs GPT-5New provider

Updated Jul 2026

Our Verdict

Claude Opus 5

Gemini 3.1 Flash LiteRunner-up

No community votes yet. On paper, Claude Opus 5 has the edge — bigger model tier, newer.

Gemini 3.1 Flash Lite is 17x cheaper per token — worth considering if cost matters.

Too close to call

What do Claude Opus 5 and Gemini 3.1 Flash Lite say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude Opus 5

Input

$5.00

Output

$25.00

Gemini 3.1 Flash Lite

Input

$0.25

20× cheaper

Output

$1.50

17× cheaper

Gemini 3.1 Flash Lite is cheaper on both — 20× input, 17× output

Writing DNA

Style Comparison

Similarity

66%

Claude Opus 5 uses 1.7x more emoji

Claude Opus 5

Gemini 3.1 Flash Lite

54%Vocabulary59%

21wSentence Length17w

0.40Hedging0.29

3.9Bold5.5

1.9Lists3.3

0.02Emoji0.00

0.71Headings0.93

0.05Transitions0.11

Based on 27 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude Opus 5 vs Ox AlphaNew provider

Gemini 3.1 Flash Lite vs MiniMax M3New provider

Claude Opus 5 vs GPT-5New provider