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  5. OpenAI o3vsSolar Pro 4
Updated Aug 2026

OpenAI o3vsSolar Pro 4

Solar Pro 4 is cheaper than OpenAI o3 at $0.09/M vs $10/M input tokens.

OpenAI o3 and Solar Pro 4 compared across 14 shared prompts
SpecOpenAI o3Solar Pro 4
Input price$10/M tokens$0.09/M tokens
Output price$40/M tokens$0.36/M tokens
Context window—524K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedApr 2025Aug 2026
Side by side

Same prompt, both answers

Opening lines from 2 of the 14 prompts both answered. Formatting stripped, words untouched.

Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

OpenAI o3279 words
Golden Peanut Butter Oat Bars A chewy-crisp, sweet-salted snack bar you can whip up with nothing but pantry staples. Estimated time Prep: 10 minutes Bake: 18–20 minutes Cool: 15 minutes Total: ≈45 minutes The 7 ingredients 1½ cups quick-cook or old-fashioned rolled oats ½ cup creamy peanut butter ⅓ cup honey (or maple…
Read the full answer
Solar Pro 4294 words
🍝 Golden Umami Silk Noodles A savory-sweet pasta dish that transforms basic pantry staples into a glossy, flavorful meal. It's quick, comforting, and relies on the balance of soy, honey, and butter for a rich sauce without needing fresh produce.
Read the full answer

Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

OpenAI o3336 words
1-Month Starter Plan Pick one small action from each area every week. Add the next step when the first feels easy. Food Week Do this 1 Add one fruit or veg to every meal. Drink one extra glass of water. 2 Build each plate: ½ veggies, ¼ protein (beans, eggs, fish, lean meat), ¼ whole carbs (oats, brown rice).
Read the full answer
Solar Pro 4859 words
Here’s a simple, progressive 1-month plan built around Diet, Exercise, and Sleep. Each week adds one small, beginner-friendly shift to each area. The goal isn’t perfection; it’s building consistent, sustainable habits that compound over time.
Read the full answer
Our Verdict
OpenAI o3
OpenAI o3
Solar Pro 4
Solar Pro 4Runner-up

Not enough votes to call it. On the specs, OpenAI o3 has the edge: bigger model tier, major provider backing.

Solar Pro 4 costs 111x less per token.

Too close to call
API pricing

Cost per 1M tokens

OpenAI o3
Input
$10.00
Output
$40.00
Solar Pro 4
Input
$0.09
111× cheaper
Output
$0.36
111× cheaper

Solar Pro 4 is cheaper on both: 111× input, 111× output.

Where to run it

2 hosts

OpenAI o31 host
HostInOutContextUptime
OpenAI$2.00 in·$8.00 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 o3 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 o3 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 o3 costs $10/M input tokens and Solar Pro 4 costs $0.09/M input tokens. Solar Pro 4 is $9.91/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 o3 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

OpenAI o3 logo
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Solar Pro 4 logo
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