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Grok 4.20

xAIProprietaryPending Human Review

Grok 4.20 is a proprietary xAI language-model release. The publicly documented API release improves coding, knowledge work, instruction following, and hallucination behavior. Reasoning and non-reasoning endpoints are joined by a multi-agent serving option that runs parallel cooperative agents. The multi-agent orchestration is grouped as a variant rather than assigned a speculative new architecture. Earlier consumer beta reports do not establish a precise primary-source availability date. Weights are not publicly downloadable. Published agent and coding results depend on the evaluation harness, tool permissions, and inference settings, so no unsupported standalone benchmark score is assigned.

2026-03-10
Undisclosed
Proprietary

Specifications

Architecture
Undisclosed
License
Proprietary
Context Window
2,000,000 tokens
Type
multimodal
Modalities
textimage

Benchmark Scores

Advanced Specifications

Model Family
Grok
API Access
Available
Chat Interface
Not Available
Variants
ReasoningNon-reasoningMulti-agent serving

Capabilities & Limitations

Capabilities
reasoningcodingtool usemulti-agent serving
Known Limitations
Closed weightsAvailability and aliases can changeOutputs may hallucinate
Notable Use Cases
developer assistantsagent workflowsgeneral assistance
Tool Use Support
Yes

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