Engineering-focused model
Trained for coding, agentic tasks, and knowledge work, with an emphasis on software engineering and technical reasoning.
Grok 4.5
Grok 4.5 is SpaceXAI’s model for coding, agentic tasks, and knowledge work. It is available in Grok Build, Cursor, the SpaceXAI console, and the API, with token-based API pricing and limited-time free usage noted on the launch page.
What is Grok 4.5?
Grok 4.5 is SpaceXAI’s latest model, presented as its smartest model for coding, agentic tasks, and knowledge work. The launch page says it is built to handle real engineering work and broader office workflows, and that it was trained alongside Cursor.
The product is available in Grok Build, in Cursor on all plans, and through the SpaceXAI console and API. The page also says free Grok 4.5 usage is available for a limited time in Grok Build and Cursor, while API usage is priced separately by token.
Key features
Curated training data
The page says it was trained on datasets covering coding, science, engineering, and math, with data filtering, deduplication, quality scoring, and domain-focused selection.
Large-scale reinforcement learning
SpaceXAI says it scaled reinforcement learning around hundreds of thousands of tasks, centered on multi-step software engineering and other technical work.
Prompt-to-production coding
The model is described as capable of building end-to-end apps from a prompt, including challenging Rust and C/C++ work.
Fast inference and token efficiency
Grok 4.5 is described as fast-model speed at 80 TPS and is presented as more token-efficient than comparable leading models on the same tasks.
Office-work support
The page says Grok 4.5 is now the default model in Grok Build and can create Excel models, PowerPoint decks, and Word documents.
Common use cases
Software engineering
Use Grok 4.5 when you need help writing or fixing code, including more demanding Rust or C/C++ tasks.
Agentic task execution
Use it for multi-step technical workflows where the model needs to reason through agentic actions and longer sequences of work.
Office productivity
Use Grok 4.5 to draft or refine office documents, including Excel models, PowerPoint decks, and Word prose.
Prompt-to-app building
Use it to turn a prompt into a functional app or prototype when you want the model to generate the structure and UI from a short spec.
Developer integration
Use the API or console when you want to integrate the model into a product or internal workflow rather than work only inside the Grok app.
Pros and Cons
Pros
- Built specifically for coding, agentic tasks, and knowledge work.
- Trained on curated data spanning coding, science, engineering, and math.
- Available across multiple access paths, including Grok Build, Cursor, the SpaceXAI console, and the API.
- The page says it is optimized for both intelligent reasoning and efficient execution on technical tasks.
- Supports office workflows such as Excel models, PowerPoint decks, and Word documents.
Cons
- The page does not provide a complete public benchmark table for every task in a way that makes direct comparison simple.
- API pricing is token-based, so total cost will vary with input and output volume.
FAQ
Where can I use Grok 4.5?
Grok 4.5 is available today in Grok Build, in Cursor on all plans, and from the SpaceXAI console. The page also says users can start via the SpaceXAI API with an API key.
What is Grok 4.5 designed for?
The page positions Grok 4.5 as SpaceXAI’s smartest model for coding, agentic tasks, and knowledge work. It is also described as especially capable for real engineering tasks, Excel-style work, and document or presentation drafting.
Is Grok 4.5 free?
The pricing page says Grok 4.5 is included with the SuperGrok plan, and the news page says there is free Grok 4.5 usage for a limited time in Grok Build and Cursor.
How is Grok 4.5 priced for API usage?
The page says Grok 4.5 is priced at $2 per million input tokens and $6 per million output tokens when used through the API.
Can teams use Grok 4.5 in multiple workflows?
Yes. The pricing page lists Grok 4.5 among the models available through SpaceXAI plans, and the news page says it is available in Grok Build and Cursor as well as through the API and SpaceXAI console.
Quick Facts
- Product type
- AI model
- Brand
- SpaceXAI
- Primary use
- Coding, agentic tasks, and knowledge work
- Availability
- Grok Build, Cursor, SpaceXAI console, API
- Pricing model
- Token-based API pricing; paid plans also listed
- Source domain
- x.ai
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