xAI: Grok 4.20
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 `reasoning` `enabled` parameter in the API. [Learn more in our docs](https://openrouter.ai/docs/use-cases/reasoning-tokens#controlling-reasoning-tokens)
Undisclosed
Parameters
2.0M tokens
Context Window
Proprietary
License
Mar 31, 2026
Released
💰 Pricing
Input
$2.00
per 1M tokens
Output
$6.00
per 1M tokens
API Available
This model is accessible via API for integration into your applications.
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