xAI launches Grok-4-Fast: Unified Reasoning and Non-Reasoning Model with 2M-Token Context and Trained End-to-End with Tool-Use Reinforcement Learning (RL) - MarkTechPost
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xAI launches Grok-4-Fast: Unified Reasoning and Non-Reasoning Model with 2M-Token Context and Trained End-to-End with Tool-Use Reinforcement Learning (RL)

xAI’s Grok-4-Fast unifies reasoning/non-reasoning, 2M-token context, tool-use reinforcement learning RL, aggressive pricing