Current Flagship Activefrontierllm Proprietary

Grok 4.3

by xAI· Released May 2025· Cutoff April 2025

Grok 4.3 is xAI's flagship frontier model, offering state-of-the-art reasoning, coding, and multimodal capabilities. It is designed for complex problem-solving and real-time data analysis, leveraging a massive context window and advanced tool use. As the latest iteration in the Grok series, it sets the benchmark for xAI's offerings.

Official Site API Docs

Input cost

$3.00 per 1M tokens

Output cost

$15.00 per 1M tokens

Context window

1M tokens

Max output

8192 tokens

Modalities

textimage

License

proprietary

Capabilities

Function CallingVisionCode GenerationStreamingJSON ModeReasoningTool UseMultilingual

Best For

Complex reasoning, coding, and data analysis tasks requiring large context and multimodal understanding.

Strengths

Exceptional reasoning and problem-solving
Very large 1M token context window
Strong coding and math performance
Multimodal (text and image input)
Real-time knowledge via X platform integration

Limitations

Higher cost compared to smaller models
Not open source
Limited availability outside xAI ecosystem
May exhibit biases from training data

Use Cases

Advanced data analysis and visualization

Complex code generation and debugging

Scientific research and literature review

Real-time news analysis and summarization

Multimodal document understanding

Strategic planning and decision support

Educational tutoring and explanation

Improvements Over Previous Model

Context window increased from 128K to 1M tokens
Improved reasoning benchmarks (e.g., MATH 95% vs 90%)
Added native image input support
Reduced pricing: $3/M input vs $5/M for predecessor
Faster inference with lower latency
Enhanced tool use and function calling reliability

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