Grok 4.5

xAI's Grok model for chat, coding, agentic tools, and lower hallucination risk

ECI STANDING#32 of 266
SCORE153.92152.49–156.04 CI
FRONTIER LAGLaunched 6.9 months behindScores about what GPT-5.2 Pro did in December 2025.
Full Epoch Capabilities Index ranking

From the lab

Launch announcement · Jul 16, 2026Introducing Grok 4.5
RELEASE DATEJul 8, 2026
WEIGHTSClosed weights
CONTEXT WINDOW500K
MAX OUTPUT500K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image
OUTPUTStext

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