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  5. OpenAI o4-minivsSolar Pro 4
Updated Aug 2026

OpenAI o4-minivsSolar Pro 4

Solar Pro 4 is cheaper than OpenAI o4-mini at $0.09/M vs $1.1/M input tokens.

OpenAI o4-mini and Solar Pro 4 compared across 14 shared prompts
SpecOpenAI o4-miniSolar Pro 4
Input price$1.1/M tokens$0.09/M tokens
Output price$4.4/M tokens$0.36/M tokens
Context window—524K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedApr 2025Aug 2026
Our Verdict
Solar Pro 4
Solar Pro 4
OpenAI o4-mini
OpenAI o4-miniRunner-up

Not enough votes to call it. On the specs, Solar Pro 4 has the edge: bigger model tier, newer, bigger context window.

Solar Pro 4 costs 12x less per token.

Too close to call
API pricing

Cost per 1M tokens

OpenAI o4-mini
Input
$1.10
Output
$4.40
Solar Pro 4
Input
$0.09
12× cheaper
Output
$0.36
12× cheaper

Solar Pro 4 is cheaper on both: 12× input, 12× output.

Where to run it

2 hosts

OpenAI o4-mini1 host
HostInOutContextUptime
OpenAI$1.10 in·$4.40 out·200k·100% up
Solar Pro 41 host
HostInOutContextUptime
UUpstage$0.09 in·$0.36 out·524k·99.8% up

Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

OpenAI o4-mini is developed by OpenAI while Solar Pro 4 is developed by Upstage. You can compare their actual outputs across 14 challenges on Rival to see how they differ in practice.

It depends on your use case. OpenAI o4-mini and Solar Pro 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 14 challenges so you can judge which fits your needs best.

OpenAI o4-mini costs $1.1/M input tokens and Solar Pro 4 costs $0.09/M input tokens. Solar Pro 4 is $1.01/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 o4-mini and Solar Pro 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

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OpenAI o4-mini59 outputs, specs and price
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