X @Elon Musk

Model Performance & Features - Grok 4.1 Fast is available for free on OpenRouter until December 3rd [1] - All Agent Tools are 100% free [1] - Tool calling performance is ranked 1 on the Berkeley leaderboard [1] - Achieves 100% on τ²-bench Telecom for real-world applications [1] - Context window of 2 million tokens, maintaining consistency on long tasks [1] - Hallucinations have been reduced by 50% compared to Grok 4 Fast [1] - Maintains the same speed as Grok 4 [1] Pricing - Input cost is $0.20 per million tokens [1] - Output cost is $0.50 per million tokens [1]