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Grok 4.20 0309 v2 vs OpenChat 3.5

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

  • Grok 4.20 0309 v2 has the higher intelligence index (91.1 vs 24.1)
  • OpenChat 3.5 is cheaper ($0.00 vs $2.00 per 1M input)
Grok 4.20 0309 v2OpenChat 3.5
Intelligence index91.124.1
DeveloperxAIOpenChat
TypeLLMLLM
Access
Context window
Input price$2.00 / 1M$0.00 / 1M
Output price$6.00 / 1M$0.00 / 1M
Speed105 tok/s
ReleasedApril 7, 2026December 18, 2023
Parameters
Input modalities
Output modalities

Shared benchmarks

Grok 4.20 0309 v2
OpenChat 3.5
GPQA Diamond
91.1
23
Humanity’s Last Exam
32.2
4.8