What is the difference between GPT-5.1-Codex and Amazon Nova 2 Lite?

GPT-5.1-Codex is developed by OpenAI while Amazon Nova 2 Lite is developed by Amazon. GPT-5.1-Codex has a 400K token context window vs Amazon Nova 2 Lite's 1.0M. You can compare their actual outputs across 35 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1-Codex or Amazon Nova 2 Lite?

It depends on your use case. GPT-5.1-Codex and Amazon Nova 2 Lite each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 35 challenges so you can judge which fits your needs best.

How much does GPT-5.1-Codex cost compared to Amazon Nova 2 Lite?

GPT-5.1-Codex costs $1.25/M input tokens and Amazon Nova 2 Lite costs $0.5/M input tokens. Amazon Nova 2 Lite is $0.75/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 GPT-5.1-Codex and Amazon Nova 2 Lite on Rival?

This page shows a side-by-side comparison of GPT-5.1-Codex and Amazon Nova 2 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.

Updated Dec 2025

GPT-5.1-CodexvsAmazon Nova 2 Lite

Amazon Nova 2 Lite is cheaper than GPT-5.1-Codex at $0.5/M vs $1.25/M input tokens.

GPT-5.1-Codex and Amazon Nova 2 Lite compared across 35 shared prompts
Spec	GPT-5.1-Codex	Amazon Nova 2 Lite
Input price	$1.25/M tokens	$0.5/M tokens
Output price	$10/M tokens	$1.5/M tokens
Context window	400K tokens	1.0M tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Nov 2025	Dec 2025