Grok 4 Fast is xAI's latest multimodal model with SOTA cost-efficiency and a 2M token context window. It comes in two flavors: non-reasoning and reasoning. Read more about the model on xAI's news post. Reasoning can be enabled using the reasoning enabled parameter in the API. Learn more in our docs
Prompts and completions may be used by xAI or OpenRouter to improve future models.
Route requests across multiple providers. Copy a provider slug to set your preference.
Direct request success rate on AI Gateway and per-provider.
P50 throughput on live AI Gateway traffic, in tokens per second (TPS).
P50 time to first token (TTFT) on live AI Gateway traffic, in milliseconds.
Token volume and request traffic to this model over time.
Token volume broken down by the provider that served each request. Larger segments indicate providers handling more of this model's traffic.
Scores on standardized evaluations. Higher percentages are better — and rank percentile shows
Metrics sourced fromArtificial Analysis
Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for. View All
More models from xAI
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Artificial Analysis
