AI model · SpaceXAI
Grok 4.20
Model ID: x-ai/grok-4.20
- Input
- $1.25 per 1M tokens
- Output
- $2.50 per 1M tokens
- Context
- 2M tokens at once
- Max output
- 1.8M tokens per reply
- Released
- 31 Mar 2026 SpaceXAI
What it can do
- YesReasoning
- YesTool calling
- YesImage input
- NoOpen weights
- NoFree to use
Takes text, image, file; gives text.
How its listing describes it
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...
Sources
- SpaceXAI: Grok 4.20 on OpenRouter — read 2 Oct 2026