GPT-5.2 Pro vs Grok 3 Thinking
Compare GPT-5.2 Pro by OpenAI against Grok 3 Thinking by xAI, context windows of 400K vs 128K, tested across 7 shared challenges. Updated April 2026.
Which is better, GPT-5.2 Pro or Grok 3 Thinking?
GPT-5.2 Pro and Grok 3 Thinking are both competitive models. Context windows: 400K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.2 Pro and Grok 3 Thinking
GPT-5.2 Pro is made by openai while Grok 3 Thinking is from xai. GPT-5.2 Pro has a 400K token context window compared to Grok 3 Thinking's 128K.
No community votes yet. On paper, GPT-5.2 Pro has the edge — newer, bigger context window.
Style Comparison
Grok 3 Thinking uses 15.8x 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.
