GPT-5.4 Pro vs Solar Pro 3
Compare GPT-5.4 Pro by OpenAI against Solar Pro 3 by Upstage, context windows of 1.1M vs 128K, tested across 17 shared challenges. Updated April 2026.
Which is better, GPT-5.4 Pro or Solar Pro 3?
GPT-5.4 Pro and Solar Pro 3 are both competitive models. GPT-5.4 Pro costs $30/M input tokens vs $0/M for Solar Pro 3. Context windows: 1050K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.4 Pro and Solar Pro 3
GPT-5.4 Pro is made by openai while Solar Pro 3 is from upstage. GPT-5.4 Pro has a 1050K token context window compared to Solar Pro 3's 128K. On pricing, GPT-5.4 Pro costs $30/M input tokens vs $0/M for Solar Pro 3.
No community votes yet. On paper, GPT-5.4 Pro has the edge — bigger model tier, newer, bigger context window, major provider backing.
Style Comparison
Solar Pro 3 uses 17.3x more emoji
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
