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.
SCORES LIKE THESE MODELSGemini 3.8 FlashGoogle DeepMind · Sep 2026156.54Claude Opus 4.7Anthropic · Apr 2026156.34GPT-5.6 LunaOpenAI · Jul 2026156.31Claude Sonnet 5Anthropic · Jun 2026156.22
Full Epoch Capabilities Index ranking ↗From the lab
Launch announcement · Aug 12, 2026Introducing Grok 4.6RELEASE 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.