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xAI: Grok 4.20
x-ai/grok-4.20
VisionTool useJSONReasoningStreaming
Grok 4.20 is a reasoning model from xAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...
Pricing
Input
$1.25 / 1M
Output
$2.50 / 1M
Specs
Context
2,000,000 tokens
Input
text, image, file
Output
text
Knowledge cutoff: 2025-09-01
Released: 2026-03
Supported parameters
include_reasoninglogprobsmax_tokensreasoningresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_logprobstop_p