Pyyan / Language Models / Grok 4.20 Reasoning

Grok 4.20 Reasoning

Agentic reasoning SKU.

currentxAI ↗Verified 2026-08-13

1M

context

Specifications

Context	1Msource · as of 2026-08-13
Input ($/Mtok)	$1.25source · as of 2026-08-13
Output ($/Mtok)	$2.5source · as of 2026-08-13
Licence	Proprietary
Model ID	grok-4.20-0309-reasoningsource · as of 2026-08-13

Official links

Grok 4.20 Reasoning model page xAI official site

Compare with

All 5 side by side →

Grok 4.20 Reasoning vs Claude Fable 5 →Grok 4.20 Reasoning vs Claude Opus 5 →Grok 4.20 Reasoning vs GPT-5.6 Sol →Grok 4.20 Reasoning vs Gemini 3.1 Pro →Grok 4.20 Reasoning vs Claude Sonnet 5 →

Also in Language Models

Claude Fable 5 · Anthropic Claude Opus 5 · Anthropic GPT-5.6 Sol · OpenAI Gemini 3.1 Pro · Google Claude Sonnet 5 · Anthropic