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Grok 4.20API
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities.
Prices update automatically — checked daily against provider list prices.
- $1.56 per 1M tokens, assuming 3 input for 1 output the convention used by Artificial Analysis
- cheaper than 59% of the 226 commercial models tracked here
- 4 of 8 xAI models tracked here, from cheapest
Benchmarks & performance
Independent benchmark scores for Grok 4.20, measured by Artificial Analysis. Higher is better. Measurement mode: Reasoning.
About this model
Grok 4.20 is a commercial AI model by xAI. The specifications below are tracked automatically: pricing is refreshed daily from public list prices, so the numbers on this page reflect the current cost of using the model through its API.
Frequently asked questions
What is Grok 4.20?
Grok 4.20 is an AI language model from xAI. It is a proprietary model, available through an API.
Is Grok 4.20 free?
Grok 4.20 is not free: it costs $1.25 per million input tokens and $2.5 per million output tokens. Open-weight alternatives can be self-hosted at no per-token cost.
What is Grok 4.20 good at?
Independent benchmarks from Artificial Analysis give it GPQA 91.1%, Humanity's Last Exam 34.5%, Long Context Reasoning 69%, IFBench 81.2%, τ²-Bench 93%, Terminal-Bench Hard 37.9%.