Grok 4.20 Beta

Current highest-end xAI family for complex reasoning, multimodal input, and web-aware workflows.

Capabilities

Modalities: textimage→text
Capabilities: reasoningwebSearchimageInputbatchSupportpromptCachingfunctionCallingstructuredOutputs
Strengths: Flagship Grok family, Very large context
Tradeoffs: Beta lifecycle, Higher cost than Fast

Official Links

Intro

Docs

Pricing

Release note

Benchmark	Version	Score	Date	Source	Notes

Release	Alias	Lifecycle	Release Date	Deprecation	Shutdown	Summary
Grok 4.20 Beta	grok-4-20-beta	Preview	Feb 18, 2026	—	—	Current published model family snapshot.

Host	Type	Context	Pricing Note	Differences
xAI API	first-party	2.0M	Reference access to flagship Grok beta families.	Structured outputs; Image input

Migration Guidance

Primary upgrade target from Grok 4 Fast when higher reasoning depth matters.

Replacement models: grok-4-fast

Change Events

Date	Type	Title	Description	Source
Feb 18, 2026	family_added	Grok 4.20 Beta published	Initial public model family launch.	Grok 4.20 Beta release notes