GPT-5.4 Pro vs o1
Compare GPT-5.4 Pro and o1, both from OpenAI, context windows of 1.1M vs 128K, tested across 18 shared challenges. Updated April 2026.
Which is better, GPT-5.4 Pro or o1?
GPT-5.4 Pro and o1 are both competitive models. GPT-5.4 Pro costs $30/M input tokens vs $15/M for o1. Context windows: 1050K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.4 Pro and o1
GPT-5.4 Pro is made by openai while o1 is from openai. GPT-5.4 Pro has a 1050K token context window compared to o1's 128K. On pricing, GPT-5.4 Pro costs $30/M input tokens vs $15/M for o1.
No community votes yet. On paper, GPT-5.4 Pro has the edge — bigger model tier, newer, bigger context window.
o1 is 3.0x cheaper per token — worth considering if cost matters.
Style Comparison
o1 uses 39.7x more transitions
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.
