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GPT-3.5 Turbo 16k vs Grok 4.20 0309

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

  • Grok 4.20 0309 is cheaper ($2.00 vs $3.00 per 1M input)
GPT-3.5 Turbo 16kGrok 4.20 0309
Intelligence index88.5
DeveloperOpenAIxAI
TypeLLMLLM
AccessAPI only
Context window16,385 tokens
Input price$3.00 / 1M$2.00 / 1M
Output price$4.00 / 1M$6.00 / 1M
Speed97 tok/s
ReleasedAugust 28, 2023March 10, 2026
Parameters
Input modalitiesText
Output modalitiesText