Grok-4

Overview

Grok 4, announced by xAI in summer 2025, represents a major leap in AI capabilities, described as 'the smartest AI in the world.' Built on version 6 of xAI's foundation model, it uses 100x more training compute than Grok 2 and 10x more reinforcement learning compute than Grok 3. The model achieves PhD-level performance across all academic disciplines simultaneously, scoring perfect on standardized tests like the SAT and near-perfect on graduate exams like the GRE. Unlike Grok 3, tool usage is built into the training process rather than relying on generalization. Trained using 200,000 GPUs, Grok 4 excels at complex reasoning, mathematical problem-solving, and coding tasks, though it has acknowledged weaknesses in multimodal capabilities that are being addressed in the next version.

Grok-4 was released on July 9, 2025. API access is available through xAI.

Benchmarks

Grok-4 Performance Across Datasets

Scores sourced from the model's scorecard, paper, or official blog posts

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llm-stats.com - Wed Jan 14 2026

Pricing

Pricing, performance, and capabilities for Grok-4 across different providers:

Provider	Input ($/M)	Output ($/M)	Max Input	Max Output	Latency (s)	Throughput	Quantization	Input	Output
xAI	$3.00	$15.00	256.0K	8.0K	0.7	100.0 c/s	—	Text Image Audio Video	Text Image Audio Video

API Access