Grok 4.3

#231Large Language ModelsProprietary

xAI

Grok 4.3 is a reasoning model from xAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...

Model updates refreshed11h agoJun 18, 2026news + changelog

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53.9

Quality Score

1249

Arena ELO

Undisclosed

Parameters

Context

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.

HumanEvalcoding

47.3

GPQAreasoning

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Official Benchmark Evidence

These are recent benchmark or leaderboard claims from official provider sources. They are useful for freshness and context, but they are not treated the same as normalized independent benchmark rows.

Grok 4.3 Benchmark Update

Benchmarksartificial-analysisMay 14, 2026

Quality: 53.2/100 | Price: $1.563/M tokens | Output: 82.977 tok/s | HumanEval: 0.473%

View source

Grok 4.3 Benchmark Update

Benchmarksartificial-analysisMay 13, 2026

Quality: 53.2/100 | Price: $1.563/M tokens | Output: 85.701 tok/s | HumanEval: 0.473%

View source

Grok 4.3 Benchmark Update

Benchmarksartificial-analysisMay 12, 2026

Quality: 53.2/100 | Price: $1.563/M tokens | Output: 81.794 tok/s | HumanEval: 0.473%

View source