Grok 4.3

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...

by xAI

Overview

Quick stats across all benchmark runs.

Score

47%

3 benchmarks

Avg Latency

6.4s

19 requests

Pricing

$1.25 in / $2.50 out

per 1M tokens

Context

1000K

tokens

Alternatives

Models with similar or better quality but different tradeoffs

No alternatives found

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Benchmark Performance

How this model performs across different benchmarks

Benchmark	Score	Rank
Explain Like I'm 5	55%	25 / 47
Categorization Bench	52%	25 / 54
Money Boy Cultural Literacy Test	47%	40 / 107

Price vs Performance

Compare cost efficiency across all models

Current model (baseline)

Other models (relative score)

Y-axis shows score difference from shared benchmarks. X-axis uses log scale.

Score Over Time

Performance trends across all benchmark runs

Benchmark Activity

Number of benchmark runs over time

Quickstart

View on OpenRouter

Get started with this model using OpenRouter

import { OpenRouter } from "@openrouter/sdk";

const openrouter = new OpenRouter({
  apiKey: "<OPENROUTER_API_KEY>"
});

const completion = await openrouter.chat.completions.create({
  model: "x-ai/grok-4.3",
  messages: [
    {
      role: "user",
      content: "Hello!"
    }
  ]
});

console.log(completion.choices[0].message.content);

Get your API key at openrouter.ai/keys

Other Models from xAI

Compare performance with other models from the same creator

Model	Latency	Cost/1M	Score
Grok 4.1 Fast	14.2s	$0.35	20%
Grok 3 Mini	22.0s	$0.40	—
Grok 3	24.7s	$9.00	—
Grok 3 Mini Beta	23.3s	$0.40	—
Grok 3 Beta	26.8s	$9.00	—
Grok 4 Fast	18.3s	$0.35	—
Grok Code Fast 1	16.1s	$0.85	—
Grok 4.20 Multi-Agent	—	$4.00	—
Grok 4	43.0s	$9.00	—
Grok 4.20	2.5s	$1.88	—