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  5. OpenAI Codex MinivsSolar Mini 4
Updated Sep 2026

OpenAI Codex MinivsSolar Mini 4

Solar Mini 4 is cheaper than OpenAI Codex Mini at $0.05/M vs $1.5/M input tokens.

OpenAI Codex Mini and Solar Mini 4 compared across 1 shared prompts
SpecOpenAI Codex MiniSolar Mini 4
Input price$1.5/M tokens$0.05/M tokens
Output price$6/M tokens$0.2/M tokens
Context window200K tokens524K tokens
Free API (OpenRouter)NoNo
ReleasedMay 2025Sep 2026
Our Verdict
OpenAI Codex Mini
OpenAI Codex Mini
Solar Mini 4
Solar Mini 4

Not enough votes to call it. On the specs, nothing separates them.

Solar Mini 4 costs 30x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

OpenAI Codex Mini
Input
$1.50
Output
$6.00
Solar Mini 4
Input
$0.05
30× cheaper
Output
$0.20
30× cheaper

Solar Mini 4 is cheaper on both: 30× input, 30× output.

Where to run it

1 host

OpenAI Codex Mini

No hosts listed on OpenRouter.

Solar Mini 41 host
HostInOutContextUptime
UUpstage$0.05 in·$0.20 out·524k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

OpenAI Codex Mini is developed by OpenAI while Solar Mini 4 is developed by Upstage. OpenAI Codex Mini has a 200K token context window vs Solar Mini 4's 524K. You can compare their actual outputs across 1 challenges on Rival to see how they differ in practice.

It depends on your use case. OpenAI Codex Mini and Solar Mini 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 1 challenges so you can judge which fits your needs best.

OpenAI Codex Mini costs $1.5/M input tokens and Solar Mini 4 costs $0.05/M input tokens. Solar Mini 4 is $1.45/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of OpenAI Codex Mini and Solar Mini 4 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.

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Model pages

OpenAI Codex Mini logo
OpenAI Codex Mini10 outputs, specs and price
Solar Mini 4 logo
Solar Mini 419 outputs, specs and price
Rival
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Explore all of Rival

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