Released Mar 31, 2026Knowledge cutoff Sep 1, 20252,000,000 context
$2/M input tokens$6/M output tokens$5/K web search
Grok 4.20 is xAI's newest flagship model with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering consistently precise and truthful responses.
Reasoning can be enabled/disabled using the reasoningenabled parameter in the API. Learn more in our docs
Providers for Grok 4.20
OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.