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, delive

Creator: xAI
Lifecycle: Active
Context: 2.0M
Max output: —
Released: Mar 31, 2026
Status: up

Input: $2.00 / 1M tokens
Output: $6.00 / 1M tokens
Cached read: $0.20 / 1M tokens
Cached write: — / 1M tokens
Batch discount: —%
Source: OpenRouter
Verified: Apr 5, 2026 (High)

Capabilities

Modalities: textimage→text
Capabilities: reasoningimageInputpromptCachingfunctionCallingstructuredOutputs

Official Links

Intro

https://openrouter.ai/x-ai/grok-4.20

Docs

https://openrouter.ai/x-ai/grok-4.20

Pricing

https://openrouter.ai/models

Benchmark Coverage

Benchmark	Version	Score	Date	Source	Notes

Release History

Release	Alias	Lifecycle	Release Date	Deprecation	Shutdown	Summary
Grok 4.20	x-ai-grok-4-20	Active	Mar 31, 2026	—	—	Model available via OpenRouter.

Host Coverage

Host	Type	Context	Pricing Note	Differences
OpenRouter	aggregator	2.0M	$2.00/1M in · $6.00/1M out via OpenRouter	—

Migration Guidance

Change Events

Date	Type	Title	Description	Source
Mar 31, 2026	family_added	Grok 4.20 published	Model made available via OpenRouter.	OpenRouter

Other models from xAI

Grok 2, Grok 3, Grok 3 Beta, Grok 3 Mini, Grok 3 Mini Beta, Grok 4, Grok 4 Fast, Grok 4.1 Fast, Grok 4.20 Beta, Grok 4.20 Multi-Agent, Grok Code Fast 1