Question 1

What is the difference between DeepSeek R1 and Claude Opus 4?

Accepted Answer

DeepSeek R1 is developed by DeepSeek while Claude Opus 4 is developed by Anthropic. DeepSeek R1 has a 128K token context window vs Claude Opus 4's 200K. in 16 community votes on RIVAL, Claude Opus 4 wins 58% of head-to-head matchups. These results are based on blind head-to-head voting across 24 challenges.

Question 2

Which is better, DeepSeek R1 or Claude Opus 4?

Accepted Answer

Based on 16 community votes on RIVAL, Claude Opus 4 wins 58% of head-to-head matchups against DeepSeek R1. Claude Opus 4 is strongest in Web Design.

Question 3

How much does DeepSeek R1 cost compared to Claude Opus 4?

Accepted Answer

DeepSeek R1 costs $0.55/M input tokens and Claude Opus 4 costs $15/M input tokens. DeepSeek R1 is $14.45/M cheaper per input. The more expensive model wins 58% of duels, so the premium may be justified by quality.

Question 4

How are DeepSeek R1 vs Claude Opus 4 votes collected on RIVAL?

Accepted Answer

RIVAL presents both models' outputs side-by-side in blind duels — voters see the responses but don't know which model produced each one. This eliminates brand bias. 16 votes have been collected for this pair across 24 challenges. All vote data is part of RIVAL's open dataset.