What is the difference between OpenAI Codex Mini and GPT-6 Astra?

Both are developed by OpenAI but target different use cases. OpenAI Codex Mini has a 200K token context window vs GPT-6 Astra's 1.1M. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, OpenAI Codex Mini or GPT-6 Astra?

It depends on your use case. OpenAI Codex Mini and GPT-6 Astra each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How much does OpenAI Codex Mini cost compared to GPT-6 Astra?

OpenAI Codex Mini costs $1.5/M input tokens and GPT-6 Astra costs $10/M input tokens. OpenAI Codex Mini is $8.50/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 OpenAI Codex Mini and GPT-6 Astra on Rival?

This page shows a side-by-side comparison of OpenAI Codex Mini and GPT-6 Astra 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 Sep 2026

OpenAI Codex MinivsGPT-6 Astra

OpenAI Codex Mini is cheaper than GPT-6 Astra at $1.5/M vs $10/M input tokens.

OpenAI Codex Mini and GPT-6 Astra compared across 10 shared prompts
Spec	OpenAI Codex Mini	GPT-6 Astra
Input price	$1.5/M tokens	$10/M tokens
Output price	$6/M tokens	$50/M tokens
Context window	200K tokens	1.1M tokens
Weights	—	Closed
Free API (OpenRouter)	No	No
Released	May 2025	Sep 2026