xAI: 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...

41.0 Coding Index*157.9 tokens/sec*$1.25/1M input tokens
Release Date
April 30, 2026
Context Window
1,000,000 tokens
Input Modalities
textimage

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Benchmarking xAI: Grok 4.3

Coding Performance

Coding benchmarks and performance metrics for development tasks

Coding Benchmarks

Artificial Analysis Coding Index

41.0%

Overall coding capability score

SciCode

47.3%

Scientific computing & algorithms

TerminalBench Hard

37.9%

CLI & terminal command generation

LCR (Long Context Reasoning)

64.3%

Understanding large codebases

IFBench

81.3%

Instruction following accuracy

Speed & Efficiency

Output Speed

157.9 tokens/sec

Median output tokens per second

Performance metrics from Artificial Analysis

Real-World Usage

Real-world usage statistics from the Kilo Code community

Weekly Token Usage

No ranking data available for this model yet.

Real-world metrics from the Kilo Code Leaderboard

Pricing

Cost per 1 million tokens

Input Tokens
$1.25
per 1M tokens
Output Tokens
$2.50
per 1M tokens

Example Cost

Analyzing a 10,000 line codebase (≈40k input tokens, 10k output tokens) costs approximately $0.0750

Coding Capabilities

Features and parameters relevant to coding tasks

Coding Features

Function Calling
Can call external functions/APIs
Tool Choice
Control over function selection
Structured Outputs
JSON schema validation
Reasoning Tokens
Extended thinking for complex problems

Pricing details from OpenRouter

Technical Details

Architecture and implementation specifications

Model ID
x-ai/grok-4.3
Artificial Analysis Slug
grok-4-3
Created
April 30, 2026
Tokenizer
Grok
Input Modalities
text, image
Context Window
1,000,000 tokens
Input Price
$1.25 per 1M tokens
Output Price
$2.50 per 1M tokens
Cache Read Price
$0.20 per 1M tokens
Content Moderation
Disabled

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