What is the difference between GPT-5 and OpenAI o3?

Both are developed by OpenAI but target different use cases. in 21 community votes on Rival, GPT-5 wins 63% of head-to-head matchups. These results are based on blind head-to-head voting across 52 challenges.

Which is better, GPT-5 or OpenAI o3?

Based on 21 community votes on Rival, GPT-5 wins 63% of head-to-head matchups against OpenAI o3. GPT-5 is strongest in Reasoning, Image Generation, Conversation. However, OpenAI o3 leads in Web Design.

How much does GPT-5 cost compared to OpenAI o3?

GPT-5 costs $1.25/M input tokens and OpenAI o3 costs $10/M input tokens. GPT-5 is $8.75/M cheaper per input. GPT-5 also wins more often in community votes, making it the better value.

How are GPT-5 vs OpenAI o3 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. 21 votes have been collected for this pair across 52 challenges. All vote data is part of Rival's open dataset.

Updated Aug 2025

GPT-5vsOpenAI o3

GPT-5 wins 63% of 21 blind community votes against OpenAI o3 on Rival.

GPT-5 and OpenAI o3 compared across 52 shared prompts
Spec	GPT-5	OpenAI o3
Win rate	63%	37%
Input price	$1.25/M tokens	$10/M tokens
Output price	$10/M tokens	$40/M tokens
Context window	400K tokens	—
Parameters	Not disclosed	Not disclosed
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Aug 2025	Apr 2025
SWE-bench Verified	74.9%	69.1%