Grok 3 Thinking vs ChatGPT-4o (March 2025)

Compare Grok 3 Thinking by xAI against ChatGPT-4o (March 2025) by OpenAI, context windows of 128K vs 128K, tested across 11 shared challenges. Updated March 2026.

Which is better, Grok 3 Thinking or ChatGPT-4o (March 2025)?

Grok 3 Thinking and ChatGPT-4o (March 2025) are both competitive models. Context windows: 128K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between Grok 3 Thinking and ChatGPT-4o (March 2025)

Grok 3 Thinking is made by xai while ChatGPT-4o (March 2025) is from openai. Grok 3 Thinking has a 128K token context window compared to ChatGPT-4o (March 2025)'s 128K.

Our Verdict
Grok 3 Thinking
Grok 3 Thinking
ChatGPT-4o (March 2025)
ChatGPT-4o (March 2025)

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call
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