What is the difference between GPT-4.1 Nano and GPT-5.3-Codex?

Both are developed by OpenAI but target different use cases. GPT-4.1 Nano has a 1.0M token context window vs GPT-5.3-Codex's 400K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-4.1 Nano or GPT-5.3-Codex?

It depends on your use case. GPT-4.1 Nano and GPT-5.3-Codex each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does GPT-4.1 Nano cost compared to GPT-5.3-Codex?

GPT-4.1 Nano costs $0.1/M input tokens and GPT-5.3-Codex costs $1.75/M input tokens. GPT-4.1 Nano is $1.65/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-4.1 Nano and GPT-5.3-Codex on Rival?

This page shows a side-by-side comparison of GPT-4.1 Nano and GPT-5.3-Codex 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 Feb 2026

GPT-4.1 NanovsGPT-5.3-Codex

GPT-4.1 Nano is cheaper than GPT-5.3-Codex at $0.1/M vs $1.75/M input tokens.

GPT-4.1 Nano and GPT-5.3-Codex compared across 53 shared prompts
Spec	GPT-4.1 Nano	GPT-5.3-Codex
Input price	$0.1/M tokens	$1.75/M tokens
Output price	$0.4/M tokens	$14/M tokens
Context window	1.0M tokens	400K tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Apr 2025	Feb 2026