o1 vs GPT-4

Compare o1 and GPT-4, both from OpenAI, context windows of 128K vs 8K, tested across 18 shared challenges. Updated March 2026.

Which is better, o1 or GPT-4?

o1 and GPT-4 are both competitive models. o1 costs $15/M input tokens vs $30/M for GPT-4. Context windows: 128K vs 8K tokens. Compare their real outputs side by side below.

Key Differences Between o1 and GPT-4

o1 is made by openai while GPT-4 is from openai. o1 has a 128K token context window compared to GPT-4's 8K. On pricing, o1 costs $15/M input tokens vs $30/M for GPT-4.

Our Verdict
o1
o1
GPT-4
GPT-4

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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