Grok 4.5
Grok 4.5 is xAI's frontier model for coding, knowledge work, and STEM — trained with high-efficiency compute for fast, capable responses. Live on Hoodgen AI with a 500K token context window.
Technical Specifications
Live data fetched from the OpenRouter model registry — always up to date.
What is Grok 4.5?
Grok 4.5 is xAI's frontier model, designed for fast agentic workflows, coding, and complex multi-step reasoning. It accepts text, image, file, audio, and video inputs — one of the most versatile models available. With a 1M token context window, it can process long documents and complex multimodal data in a single session.
Features & Capabilities
Frontier Coding
Strong code generation, reasoning, and debugging.
STEM Power
Math, science, and engineering knowledge work.
500K Context
Large inputs with 450K max output in one response.
Agentic Capable
Tools and multi-step task execution.
Multimodal Input
Text, image, and file inputs supported.
Efficient Compute
High-efficiency training keeps pricing competitive.
Who Is Grok 4.5 For?
Complex Coding
Large refactors, fresh builds, and debugging sessions.
Knowledge Work
Research synthesis, analysis, and long-form drafting.
STEM & Math
Scientific reasoning and quantitative problem-solving.
Long Output Generation
450K max output for big documents and codebases.
Grok 4.5 Pricing
- Unlimited chats on free plan credits
- No credit card required
- Included in Hoodgen AI free tier (100 credits/mo)
- Premium models also available on paid plans
What Makes Grok 4.5 Different?
Grok 4.5's edge is capability per compute: xAI trains on its Colossus cluster with a high-efficiency compute allocation, which lets the model deliver frontier-level results at a fraction of the training cost of comparable flagships.
Practically, that shows up in two places. First, a 500K context window paired with a 450,000-token max output — one of the largest output limits available, useful for generating entire repositories or reports in a single pass. Second, strong tool use for agentic coding and research workflows.
On OpenRouter, Grok 4.5 costs $2 per million input tokens and $6 per million output tokens — competitive for a frontier-tier model with its output ceiling.
Grok 4.5 Performance
Grok 4.5 brings xAI's frontier training to coding, knowledge work, and STEM with a 500K context window and 450K max output.
What Can You Do With Grok 4.5?
Grok 4.5 is built for speed across every modality. Build agents that see, hear, and read; analyze media; generate code; and process long documents — all with fast responses and a 1M context window that fits large inputs in one session.
Best Use Cases
- Fast agentic workflows
- Multimodal content analysis
- Code generation and review
- Long-document processing
- Real-time reasoning applications
Grok 4.5 Privacy & Data Policy
Grok 4.5 is developed by xAI and hosted on OpenRouter. Prompts and completions are processed by xAI's API. As with any third-party model, avoid sharing sensitive personal data.
Because Grok 4.5 is a third-party hosted model, avoid pasting passwords, personal data, or proprietary source code you would not share with any external provider. Hoodgen AI always keeps free alternative models available so you can switch without interruption.
Grok 4.5 vs Other Models
Frequently Asked Questions
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