Grok 4.20 Beta

#313MultimodalProprietary

xAI

Grok 4. 20 Beta 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, delivering consistently precise and truthful responses.

Model updates refreshed2mo agoJul 1, 2026news + changelog

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What changed

Grok 4.20 Beta is xAI's newest flagship model with industry-leading speed and agentic tool calling capabilities.

37.1

Quality Score

1256

Arena ELO

Undisclosed

Parameters

Context

Evidence profile

How complete is this record?

This measures the amount of verifiable public evidence we have, not how capable the model is. A missing field means it has not been verified yet, not that its value is zero.

59%

coverage

Developing evidence

13 of 22 public signals

Technical profile60%

Benchmarks and Competitive Signal

Structured

Use this section to answer one simple question first: how much outside evidence do we have that this model performs well? Structured benchmark scores appear first, then official provider evidence, then live arena signal.

This model has normalized benchmark rows, so scores here are directly comparable across benchmark sources.

TAU-Benchreasoning

18.0

SWE-Benchcoding