Grok 4.20 Beta vs o3 Mini
Compare Grok 4.20 Beta by xAI against o3 Mini by OpenAI, context windows of 2.0M vs 64K, tested across 53 shared challenges. Updated April 2026.
Which is better, Grok 4.20 Beta or o3 Mini?
Grok 4.20 Beta and o3 Mini are both competitive models. Grok 4.20 Beta costs $2/M input tokens vs $1.1/M for o3 Mini. Context windows: 2000K vs 64K tokens. Compare their real outputs side by side below.
Key Differences Between Grok 4.20 Beta and o3 Mini
Grok 4.20 Beta is made by xai while o3 Mini is from openai. Grok 4.20 Beta has a 2000K token context window compared to o3 Mini's 64K. On pricing, Grok 4.20 Beta costs $2/M input tokens vs $1.1/M for o3 Mini.
No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, newer, bigger context window.
Style Comparison
o3 Mini uses 2.8x 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.
