#04xAI· 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

1564

LMArena — human blind votes

AA Index

70.0

Artificial Analysis composite

LiveBench

82.9

Contamination-resistant

GPQA

89.7%

Grad-level science reasoning

MMLU-Pro

90.1%

Broad knowledge

SWE-bench

78.8%

Real GitHub bugs (Verified)

Terminal-Bench

56.1%

Agentic shell tasks

ARC-AGI

22.1%

Abstract reasoning

Aider Polyglot

85.6%

Multi-language code editing

Speed

76 tok/s

Median output speed