#03xAI· released 2026-07-08

xAI: Grok 4.5.

Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.

Context

500K

Input $/1M

$2.00

Output $/1M

$6.00

Modality

text · image · file

Benchmarks

Arena Elo

1565

LMArena — human blind votes

AA Index

69.0

Artificial Analysis composite

LiveBench

82.8

Contamination-resistant

GPQA

89.7%

Grad-level science reasoning

MMLU-Pro

87.4%

Broad knowledge

SWE-bench

74.9%

Real GitHub bugs (Verified)

Terminal-Bench

53.8%

Agentic shell tasks

ARC-AGI

20.9%

Abstract reasoning

Aider Polyglot

85.8%

Multi-language code editing

Speed

68 tok/s

Median output speed