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Grok 4.20 0309 vs o1-preview

xAI vs OpenAI — benchmarks, pricing, and capabilities side by side.

  • Grok 4.20 0309 has the higher intelligence index (88.5 vs 57.3)
  • Grok 4.20 0309 is cheaper ($2.00 vs $15.00 per 1M input)
  • Grok 4.20 0309 is faster
Grok 4.20 0309o1-preview
Intelligence index88.557.3
DeveloperxAIOpenAI
TypeLLMLLM
AccessAPI only
Context window128,000 tokens
Input price$2.00 / 1M$15.00 / 1M
Output price$6.00 / 1M$60.00 / 1M
Speed97 tok/s66 tok/s
ReleasedMarch 10, 2026September 12, 2024
Parameters
Input modalities
Output modalities

Shared benchmarks

Grok 4.20 0309
o1-preview
GPQA Diamond
88.5
73.3