Grok 4.6

xAI's frontier model for long-running agents, coding, knowledge work, and visual projects

ECI STANDING#17 of 266
SCORE156.35154.77–158.88 CI
FRONTIER LAGLaunched 6.2 months behindScores about what GPT-5.3 Codex did in February 2026.
Full Epoch Capabilities Index ranking

From the lab

Launch announcement · Aug 12, 2026Introducing Grok 4.6
RELEASE DATEAug 12, 2026
WEIGHTSClosed weights
CONTEXT WINDOW500K
MAX OUTPUT500K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image
OUTPUTStext

Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.