GPT-3.5 Turbo vs Grok 3

Compare GPT-3.5 Turbo by OpenAI against Grok 3 by xAI, context windows of 16K vs 128K, tested across 23 shared challenges. Updated April 2026.

Which is better, GPT-3.5 Turbo or Grok 3?

GPT-3.5 Turbo and Grok 3 are both competitive models. Context windows: 16K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-3.5 Turbo and Grok 3

GPT-3.5 Turbo is made by openai while Grok 3 is from xai. GPT-3.5 Turbo has a 16K token context window compared to Grok 3's 128K.

Our Verdict
Grok 3
Grok 3
GPT-3.5 Turbo
GPT-3.5 TurboRunner-up

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

Slight edge
Writing DNA

Style Comparison

Similarity
97%

Grok 3 uses 246.4x more bold

GPT-3.5 Turbo
Grok 3
61%Vocabulary49%
16wSentence Length18w
0.23Hedging0.94
0.0Bold2.5
3.7Lists3.0
0.00Emoji0.04
0.00Headings0.65
0.38Transitions0.08
Based on 11 + 17 text responses
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GPT-3.5 TurboGrok 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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