What is the difference between GPT-5 and Llama 3.1 70B (Instruct)?

GPT-5 is developed by OpenAI while Llama 3.1 70B (Instruct) is developed by Meta AI. GPT-5 has a 400K token context window vs Llama 3.1 70B (Instruct)'s 128K. You can compare their actual outputs across 50 challenges on Rival to see how they differ in practice.

Which is better, GPT-5 or Llama 3.1 70B (Instruct)?

It depends on your use case. GPT-5 and Llama 3.1 70B (Instruct) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 50 challenges so you can judge which fits your needs best.

How much does GPT-5 cost compared to Llama 3.1 70B (Instruct)?

GPT-5 costs $1.25/M input tokens and Llama 3.1 70B (Instruct) costs $0.59/M input tokens. Llama 3.1 70B (Instruct) is $0.66/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 GPT-5 and Llama 3.1 70B (Instruct) on Rival?

This page shows a side-by-side comparison of GPT-5 and Llama 3.1 70B (Instruct) 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 Aug 2025

GPT-5vsLlama 3.1 70B (Instruct)

Llama 3.1 70B (Instruct) is cheaper than GPT-5 at $0.59/M vs $1.25/M input tokens.

GPT-5 and Llama 3.1 70B (Instruct) compared across 50 shared prompts
Spec	GPT-5	Llama 3.1 70B (Instruct)
Input price	$1.25/M tokens	$0.59/M tokens
Output price	$10/M tokens	$0.79/M tokens
Context window	400K tokens	128K tokens
Parameters	Not disclosed	70B
Weights	Closed	Open
Free API (OpenRouter)	No	No
Released	Aug 2025	Jul 2024