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Grok-4

Multimodal
xAI

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 base model, it uses 100x more training compute than Grok 2 and 10x more reinforcement learning compute than Grok 3.

Key Specifications

Parameters
-
Context
256.0K
Release Date
July 8, 2025
Average Score
74.8%

Timeline

Key dates in the model's history
Announcement / Last Update
July 8, 2025
Today
March 25, 2026

Technical Specifications

Parameters
-
Training Tokens
-
Knowledge Cutoff
December 1, 2024
Family
-
Capabilities
MultimodalZeroEval

Pricing & Availability

Input (per 1M tokens)
$3.00
Output (per 1M tokens)
$15.00
Max Input Tokens
256.0K
Max Output Tokens
8.0K
Supported Features
Function CallingStructured OutputCode ExecutionWeb SearchBatch InferenceFine-tuning

Benchmark Results

Model performance metrics across various tests and benchmarks

Reasoning

Logical reasoning and analysis
GPQA
accuracy • Self-reported
88.0%

Other Tests

Specialized benchmarks
AIME 2025
accuracy • Self-reported
92.0%
LiveCodeBench
accuracy • Self-reported
79.0%
HLE
accuracy • Self-reported
40.0%

License & Metadata

License
proprietary
Announcement Date
July 8, 2025
Last Updated
July 8, 2025

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