Grok 3 Thinking vs GPT-1

Compare Grok 3 Thinking by xAI against GPT-1 by OpenAI, context windows of 128K vs 1K, tested across 5 shared challenges. Updated April 2026.

Which is better, Grok 3 Thinking or GPT-1?

Grok 3 Thinking and GPT-1 are both competitive models. Context windows: 128K vs 1K tokens. Compare their real outputs side by side below.

Key Differences Between Grok 3 Thinking and GPT-1

Grok 3 Thinking is made by xai while GPT-1 is from openai. Grok 3 Thinking has a 128K token context window compared to GPT-1's 1K.

Our Verdict
Grok 3 Thinking
Grok 3 Thinking
GPT-1
GPT-1Runner-up

No community votes yet. On paper, Grok 3 Thinking has the edge — bigger model tier, newer, bigger context window.

Slight edge
Writing DNA

Style Comparison

Similarity
64%

Grok 3 Thinking uses 334.3x more bold

Grok 3 Thinking
GPT-1
46%Vocabulary65%
19wSentence Length14w
1.11Hedging0.27
3.3Bold0.0
2.6Lists0.3
0.00Emoji0.00
0.64Headings0.00
0.25Transitions0.41
Based on 6 + 7 text responses
vs

Ask them anything yourself

Grok 3 ThinkingGPT-1

Some models write identically. You are paying for the brand.

178 models fingerprinted across 32 writing dimensions. Free research.

Model Similarity Index

185x

price gap between models that write identically

178

models

12

clone pairs

32

dimensions

Devstral M / S
95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
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