What is the difference between Claude Opus 4.1 and GPT-5?

Claude Opus 4.1 is developed by Anthropic while GPT-5 is developed by OpenAI. Claude Opus 4.1 has a 200K token context window vs GPT-5's 400K. in 104 community votes on Rival, Claude Opus 4.1 wins 58% of head-to-head matchups. These results are based on blind head-to-head voting across 51 challenges.

Which is better, Claude Opus 4.1 or GPT-5?

Based on 104 community votes on Rival, Claude Opus 4.1 wins 58% of head-to-head matchups against GPT-5. Claude Opus 4.1 is strongest in Web Design, Conversation. However, GPT-5 leads in Image Generation, Reasoning, Analysis.

How much does Claude Opus 4.1 cost compared to GPT-5?

Claude Opus 4.1 costs $15/M input tokens and GPT-5 costs $1.25/M input tokens. GPT-5 is $13.75/M cheaper per input. The more expensive model wins 58% of duels, so the premium may be justified by quality.

How are Claude Opus 4.1 vs GPT-5 votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 104 votes have been collected for this pair across 51 challenges. All vote data is part of Rival's open dataset.

Updated Aug 2025

Claude Opus 4.1vsGPT-5

Claude Opus 4.1 wins 58% of 104 blind community votes against GPT-5 on Rival.

Claude Opus 4.1 and GPT-5 compared across 51 shared prompts
Spec	Claude Opus 4.1	GPT-5
Win rate	58%	42%
Input price	$15/M tokens	$1.25/M tokens
Output price	$75/M tokens	$10/M tokens
Context window	200K tokens	400K tokens
Parameters	Not disclosed	Not disclosed
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Aug 2025	Aug 2025
SWE-bench Verified	74.5%	74.9%