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GPT-3.5 Turbo vs Grok 4.3

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

  • Grok 4.3 has the higher intelligence index (90.1 vs 35.2)
  • GPT-3.5 Turbo is cheaper ($0.50 vs $1.25 per 1M input)
  • GPT-3.5 Turbo is faster
  • Grok 4.3 has a larger context window (1M)
GPT-3.5 TurboGrok 4.3
Intelligence index35.290.1
DeveloperOpenAIxAI
TypeLLMLLM
AccessAPI onlyAPI only
Context window16,385 tokens1,000,000 tokens
Input price$0.50 / 1M$1.25 / 1M
Output price$1.50 / 1M$2.50 / 1M
Speed100 tok/s88 tok/s
ReleasedMarch 1, 2023May 6, 2026
Parameters
Input modalitiesTextText, Image
Output modalitiesTextText

Shared benchmarks

GPT-3.5 Turbo
Grok 4.3
GPQA Diamond
30.8
90.1