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  5. Gemini 2.5 Flash Preview 05-20 (thinking)vsSolar Mini 4
Updated Sep 2026

Gemini 2.5 Flash Preview 05-20 (thinking)vsSolar Mini 4

Solar Mini 4 is cheaper than Gemini 2.5 Flash Preview 05-20 (thinking) at $0.05/M vs $0.15/M input tokens.

Gemini 2.5 Flash Preview 05-20 (thinking) and Solar Mini 4 compared across 1 shared prompts
SpecGemini 2.5 Flash Preview 05-20 (thinking)Solar Mini 4
Input price$0.15/M tokens$0.05/M tokens
Output price$3.5/M tokens$0.2/M tokens
Context window1.0M tokens524K tokens
Free API (OpenRouter)NoNo
ReleasedMay 2025Sep 2026
Our Verdict
Gemini 2.5 Flash Preview 05-20 (thinking)
Gemini 2.5 Flash Preview 05-20 (thinking)
Solar Mini 4
Solar Mini 4Runner-up

Not enough votes to call it. On the specs, Gemini 2.5 Flash Preview 05-20 (thinking) has the edge: bigger model tier, bigger context window, major provider backing.

Solar Mini 4 costs 18x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemini 2.5 Flash Preview 05-20 (thinking)
Input
$0.15
Output
$3.50
Solar Mini 4
Input
$0.05
3.0× cheaper
Output
$0.20
18× cheaper

Solar Mini 4 is cheaper on both: 3.0× input, 18× output.

Where to run it

1 host

Gemini 2.5 Flash Preview 05-20 (thinking)

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

Gemini 2.5 Flash Preview 05-20 (thinking) is developed by Google AI while Solar Mini 4 is developed by Upstage. Gemini 2.5 Flash Preview 05-20 (thinking) has a 1.0M 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. Gemini 2.5 Flash Preview 05-20 (thinking) 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.

Gemini 2.5 Flash Preview 05-20 (thinking) costs $0.15/M input tokens and Solar Mini 4 costs $0.05/M input tokens. Solar Mini 4 is $0.10/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 Gemini 2.5 Flash Preview 05-20 (thinking) 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.

Keep exploring

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Model pages

Gemini 2.5 Flash Preview 05-20 (thinking) logo
Gemini 2.5 Flash Preview 05-20 (thinking)12 outputs, specs and price
Solar Mini 4 logo
Solar Mini 419 outputs, specs and price
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