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Grok 4.20

Name: Grok 4.20
Author: xAI

by xAI

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 promp

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Models

Grok 4.20

Added 10 July 2026

#x-ai

Overview

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...

How to use / API access

Call via OpenRouter with model id `x-ai/grok-4.20`.

openrouter · x-ai/grok-4.20 Docs

OpenRouter id: x-ai/grok-4.20

Benchmarks

Design Arena androidnative (other) : 1176 elo · #16
Design Arena fullstack (other) : 1113 elo · #22
Design Arena godotgamedev (other) : 1131 elo · #17
Design Arena mobileapps (other) : 1180 elo · #20

Notes

Grok 4.20 is listed in the EDNA Models directory from the OpenRouter catalogue.

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