Grok 4.20
language modelxAI
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...
Key facts
| Made by | xAI |
|---|---|
| Type | language model |
| Released | March 31, 2026 |
| Reads at once | 2,000,000 tokens |
| Price (API, per million tokens) | $1.25 in · $2.5 out |
| Input → output | text, image, file → text |
Questions about Grok 4.20
Who makes Grok 4.20?
Grok 4.20 is made by xAI.
When was Grok 4.20 released?
We first saw Grok 4.20 listed on March 31, 2026.
How much does Grok 4.20 cost?
Through OpenRouter it costs $1.25 per million input tokens and $2.5 per million output tokens. Prices change, so check the provider before you build on it.
How much text can Grok 4.20 read at once?
Up to 2,000,000 tokens, roughly 1.5M words.
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Modelcast collects this page automatically from public sources (OpenRouter). Facts are copied from those sources, not written by the maker. Not affiliated with xAI.