GPT-5.1
Nothing here. The model returned empty. We stared at it for a while.
GPT-5.1 vs o3 Mini
Compare GPT-5.1 and o3 Mini, both from OpenAI, context windows of 400K vs 64K, tested across 52 shared challenges. Updated April 2026.
Which is better, GPT-5.1 or o3 Mini?
GPT-5.1 and o3 Mini are both competitive models. GPT-5.1 costs $1.25/M input tokens vs $1.1/M for o3 Mini. Context windows: 400K vs 64K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.1 and o3 Mini
GPT-5.1 is made by openai while o3 Mini is from openai. GPT-5.1 has a 400K token context window compared to o3 Mini's 64K. On pricing, GPT-5.1 costs $1.25/M input tokens vs $1.1/M for o3 Mini.
Our Verdict
GPT-5.1
o3 MiniRunner-up
No community votes yet. On paper, GPT-5.1 has the edge — bigger model tier, newer, bigger context window.
Slight edge
Writing DNA
Style Comparison
Similarity
89%
o3 Mini uses 13.8x more transitions
GPT-5.1
o3 Mini
62%Vocabulary65%
19wSentence Length17w
0.29Hedging0.74
3.5Bold3.9
7.2Lists1.7
0.00Emoji0.00
0.61Headings0.47
0.03Transitions0.38
Based on 14 + 12 text responses
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
Free preview13 of 58 slides
FAQ