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  5. o3 MinivsSolar Pro 4
Updated Aug 2026

o3 MinivsSolar Pro 4

Solar Pro 4 is cheaper than o3 Mini at $0.09/M vs $1.1/M input tokens.

o3 Mini and Solar Pro 4 compared across 14 shared prompts
Speco3 MiniSolar Pro 4
Input price$1.1/M tokens$0.09/M tokens
Output price$4.4/M tokens$0.36/M tokens
Context window64K tokens524K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedDec 2024Aug 2026
Our Verdict
Solar Pro 4
Solar Pro 4
o3 Mini
o3 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

o3 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

o3 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

o3 Mini is developed by OpenAI while Solar Pro 4 is developed by Upstage. o3 Mini has a 64K token context window vs Solar Pro 4's 524K. You can compare their actual outputs across 14 challenges on Rival to see how they differ in practice.

It depends on your use case. o3 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.

o3 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 o3 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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o3 Mini59 outputs, specs and price
Solar Pro 4 logo
Solar Pro 414 outputs, specs and price
Rival
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Explore all of Rival

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