Solar Pro 3 vs OpenAI o3

Compare Solar Pro 3 by Upstage against OpenAI o3 by OpenAI, tested across 39 shared challenges. Updated April 2026.

Which is better, Solar Pro 3 or OpenAI o3?

Solar Pro 3 and OpenAI o3 are both competitive models. Solar Pro 3 costs $0/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.

Key Differences Between Solar Pro 3 and OpenAI o3

Solar Pro 3 is made by upstage while OpenAI o3 is from openai. On pricing, Solar Pro 3 costs $0/M input tokens vs $10/M for OpenAI o3.

Our Verdict
OpenAI o3
OpenAI o3
Solar Pro 3
Solar Pro 3Runner-up

No community votes yet. On paper, OpenAI o3 has the edge — bigger model tier, major provider backing.

Too close to call
Writing DNA

Style Comparison

Similarity
96%

Solar Pro 3 uses 17.3x more emoji

Solar Pro 3
OpenAI o3
50%Vocabulary68%
21wSentence Length14w
0.42Hedging0.26
6.5Bold0.7
2.2Lists3.0
0.17Emoji0.00
0.56Headings0.38
0.12Transitions0.12
Based on 18 + 16 text responses
vs

Ask them anything yourself

Solar Pro 3OpenAI o3

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
FAQ

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