Grok 4.5 — reviews, specs & pricing

xAI's frontier model for coding and agentic work. $4/$12 above 200k prompt tokens.

Summary

Grok 4.5 is xAI's frontier model engineered specifically for advanced coding, complex reasoning, and agentic workflows. Featuring a massive 500k token context window, it excels at digesting massive codebases and executing multi-step developer tasks with high precision. Its tiered pricing model offers highly competitive rates for standard prompts, making it a compelling option for enterprise-grade automation.

Sample use case

An enterprise software team leverages Grok 4.5 to refactor a legacy monolithic application into microservices. By feeding entire repositories into its 500k context window, the model acts as an autonomous agent that analyzes dependencies, rewrites code across multiple files, and generates integration tests, drastically accelerating the modernization process.

Specifications

  • Provider: xai
  • License: closed
  • Context: 500k tokens
  • Input price: $2/M tok
  • Output price: $6/M tok

Pros

  • Massive 500k token context window
  • Optimized for advanced coding and agentic tasks
  • Highly competitive pricing under 200k prompt tokens
  • Strong reasoning capabilities for complex workflows

Cons

  • Price doubles for prompts exceeding 200k tokens
  • Limited to text and code modalities
  • Newer developer ecosystem compared to established rivals

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Frequently asked questions

What is Grok 4.5?

Grok 4.5 is xAI's frontier model engineered specifically for advanced coding, complex reasoning, and agentic workflows. Featuring a massive 500k token context window, it excels at digesting massive codebases and executing multi-step developer tasks with high precision. Its tiered pricing model offers highly competitive rates for standard prompts, making it a compelling option for enterprise-grade automation.

How much does Grok 4.5 cost?

Grok 4.5 costs $2 per million input tokens and $6 per million output tokens.

Is Grok 4.5 open source?

Grok 4.5 is released under the closed license.