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AI Summary
- Grok 4 Fast is speed-optimized variant of Grok 4 prioritizing low latency and cost-efficiency, using 40% fewer 'thinking' tokens while maintaining comparable performance to flagship model
- Offers nearly 98% lower price per comparable performance unit with 2M-token context window, unified weight space for reasoning/non-reasoning tasks, and multimodal support
- Positioned as excellent daily driver for rapid iteration and coding workflows, though consensus suggests retaining slower models for most complex long-form reasoning