AI That Writes Code: Top Tools & How They Work

By

Liz Fujiwara

Jul 24, 2025

Illustration of an AI assistant generating lines of code on a developer’s screen, with icons for tools like GitHub Copilot and CodeWhisperer.
Illustration of an AI assistant generating lines of code on a developer’s screen, with icons for tools like GitHub Copilot and CodeWhisperer.
Illustration of an AI assistant generating lines of code on a developer’s screen, with icons for tools like GitHub Copilot and CodeWhisperer.

Curious about how artificial intelligence (AI) that codes works? Today’s AI-powered coding tools can generate code based on your instructions, provide real-time smart suggestions, and even help debug and optimize your programs. These advancements are transforming software development by speeding up workflows, reducing repetitive tasks, and improving code quality. This article explores some of the leading AI coding tools and shows how they allow developers to code more efficiently. Whether you’re looking to boost productivity, learn new programming languages, or streamline complex projects, AI coding assistants are becoming indispensable in today’s software development landscape.

Key Takeaways

  • AI-powered code generation tools enhance developer productivity by automating repetitive tasks, offering real-time suggestions, and supporting multiple programming languages.

  • Integrating AI into coding workflows not only improves code quality through automated debugging and context-aware assistance but also supports learning for new developers by providing hands-on guidance and code explanations.

  • While AI tools significantly aid the coding process, human oversight remains essential, as evidenced by developers accepting only 44% of AI-generated code suggestions.

AI-Powered Code Generation Tools

AI-powered code generation tools are transforming how developers approach coding tasks by:

  • Using advanced algorithms to generate code from natural language descriptions, effectively bridging the gap between human intent and software development.

  • Supporting multiple programming languages, enabling developers to work seamlessly across diverse environments and projects.

  • Providing real-time code suggestions and autocompletion that help developers stay focused and increase coding speed. This generated code significantly improves efficiency and enhances the overall coding experience.

AI code generation streamlines the development process, increasing productivity while ensuring cleaner, more efficient code.

Notable benefits of AI code generators include:

  • Their ability to translate code between different programming languages simplifies debugging and improves collaboration.
    Leveraging machine learning models to understand context and offer intelligent fixes greatly enhances code quality.

  • Automating repetitive tasks such as documentation and error detection allows developers to focus on the creative aspects of coding.

The integration of AI into coding workflows produces high-quality code snippets and optimizes processes. Tools like Codiga offer features such as code optimization and debugging across multiple languages, making them valuable assets for development teams.

As we explore specific AI-powered code generation tools, we will highlight how each enhances the developer experience and contributes to more efficient and effective coding practices.

GitHub Copilot

GitHub Copilot is a game-changer among modern code completion tools. It integrates seamlessly with popular IDEs like Visual Studio Code, offering real-time code suggestions and autocompletion that significantly boost coding speed and productivity. By drawing from GitHub’s vast repository data, Copilot delivers high-quality code snippets and intelligent suggestions, making it an invaluable tool for developers.

Whether you're starting a new project or reviewing a pull request, GitHub Copilot helps maintain code quality while streamlining your workflow.

OpenAI Codex

OpenAI Codex stands out as an AI-powered coding assistant that translates natural language prompts into functional Python code, with support for multiple programming languages. By supporting a wide range of programming languages, Codex allows users to input natural language descriptions and receive accurate code snippets, making it highly versatile across various development environments.

Its advanced AI capabilities provide high-quality code snippets and detailed explanations, enhancing the overall coding experience and simplifying complex tasks.

Google Cloud's Vertex AI

Google Cloud’s Vertex AI leverages the advanced Gemini models to deliver powerful AI capabilities for coding tasks. It supports multiple programming languages, including Python, JavaScript, and Fortran, making it a robust tool for diverse coding needs. Vertex AI offers real-time code completion and tailored suggestions based on conversational prompts, enabling developers to address specific coding queries efficiently.

This powerful tool enhances the development process by integrating seamlessly with existing workflows and providing comprehensive coding assistance.

Enhancing Code Quality with AI

One of the most impactful contributions of AI tools is their ability to enhance code quality. By providing instant feedback, identifying bugs, and suggesting improvements, AI tools streamline the code review process and help ensure high-quality code. Traditional code reviews are time-consuming, but AI assistance significantly reduces review time, freeing developers to focus on more critical tasks. These tools use machine learning and natural language processing to automate issue detection and resolution, making debugging more efficient and less labor-intensive.

AI tools like Codiga and DeepCode AI play a key role in maintaining code security and optimizing structure:

  • Codiga is a static analysis tool that identifies vulnerabilities and delivers real-time security insights.

  • These tools reduce the manual effort involved in traditional debugging.

  • They boost development efficiency.

  • They help ensure a more secure codebase.

Integrating AI into coding workflows not only improves the developer experience but also reduces cognitive load, helping teams manage complex tasks more effectively. While AI tools may not always speed up output for seasoned developers, their support in managing complex tasks is invaluable.

DeepCode AI

DeepCode AI is known for its continuous code security monitoring and robust analysis capabilities. By combining symbolic AI with generative AI, it delivers in-depth code analysis to identify vulnerabilities and optimize the structure. This tool is especially useful for developers working on security-critical projects. However, DeepCode AI doesn’t support every programming language, which may limit its usability for some developers.

DeepCode AI offers a free plan through Snyk, with paid tiers starting at $25 per month, making it accessible to both individual developers and larger teams. Its advanced ML models and real-time suggestions enhance the coding experience, helping developers produce high-quality, secure code more efficiently.

Intellicode

Intellicode boosts coding efficiency by offering context-aware suggestions based on real-world examples from GitHub’s vast repository data. It integrates seamlessly with Visual Studio Code, offering high-quality code snippets and intelligent in-context assistance at no additional cost.

This makes Intellicode a strong tool for improving code quality and streamlining workflows, especially for developers looking to tap into GitHub’s massive knowledge base.

AI Assistance in Code Reviews

AI-powered code reviews are transforming how developers manage code quality and efficiency. These tools:

  • Can operate directly within integrated development environments (IDEs), offering real-time suggestions based on the code’s context.

  • Speed up the review process while maintaining high code quality.

  • Include tools like Gemini Code Assist, which automate reviews, detect bugs, and suggest improvements.

This allows developers to spend more time coding and less time on manual review.

The benefits of AI in code reviews go beyond just speed and efficiency. Regular developer reviews of AI-generated code are crucial for maintaining quality and ensuring code meets project standards. This human oversight is essential to fully leverage AI tools and avoid potential pitfalls tied to automation.

Let’s explore tools that provide AI assistance in code reviews, keeping your code clean, efficient, and secure with enterprise-grade protection.

Qodo Merge 1.0

Qodo Merge 1.0 prioritizes critical issues to streamline the review process and uphold code quality by:

  • Focusing on elements that could break the system, ensuring developers tackle the most important issues first.

  • Offering powerful features like test generation, a coding agent, code review, and auto-documentation.

  • Including a default focus mode that reduces distractions, helping developers stay concentrated on code quality and efficiency.

Together, these features make Qodo Merge an invaluable tool for maintaining high code standards. Developers can get started with Qodo Merge by downloading the free VS Code extension or JetBrains plugin, making it easy to enhance any coding workflow.

Gemini Code Assist

Gemini Code Assist integrates with GitHub to automate the entire code review process. It detects bugs and style issues, suggests improvements, and delivers real-time suggestions to enhance both code quality and efficiency.

By automating these processes, Gemini Code Assist frees developers to focus on coding instead of manual review, boosting productivity and maintaining high code quality.

AI Tools for Learning to Code

AI tools are becoming essential for new developers, helping them understand coding concepts and gain hands-on experience. These tools not only provide context-aware suggestions but also help learners overcome challenges more efficiently. By leveraging AI, learners can accelerate their coding skills, making the learning process smoother and more effective.

Tools like OpenAI Codex transform natural language into functional code, offering context-aware suggestions that simplify learning. Similarly, Codegeex’s AI chatbot answers coding questions directly within the development environment, providing real-time support and helping learners grasp complex concepts.

Let’s take a closer look at a few AI tools built to improve the learning experience.

AskCodi

AskCodi enhances the learning experience by offering code suggestions and learning support, making it easier for users to understand programming concepts. Its ability to break down code snippets with detailed explanations aids comprehension, though framing the right questions can be a challenge.

AskCodi offers a free plan, letting users start learning without a financial commitment, making it an accessible tool for beginners.

Replit

Replit combines AI assistance with an interactive development environment, enabling users to execute and test their code instantly. Supporting a wide range of programming languages, Replit is versatile for many coding projects and helps developers write and understand code more effectively through hands-on practice. This makes it an excellent tool for reinforcing learning and ensuring concepts are fully understood.

AI in Debugging and Error Fixing

AI tools are revolutionizing debugging and error fixing through:

  • Providing real-time insights and automating the detection of potential bugs.

  • Utilizing machine learning to identify errors before they occur, significantly improving code quality and reducing manual debugging time.

  • Using static application security testing (SAST) to spot vulnerabilities without executing code, ensuring a more secure codebase.

AI-powered coding assistants like Codiga come equipped with:

  • Auto-fixing features that enable developers to resolve identified code issues.

  • Support for automatic test case generation, enhancing coverage and ensuring code is robust and error-free.

  • Code analysis using an abstract syntax tree (AST), improving issue detection accuracy and streamlining the debugging process.

Let’s explore specific tools that exemplify these capabilities and see how they enhance debugging and integration test processes.

Amazon CodeWhisperer

Amazon CodeWhisperer is an AI coding assistant that offers intelligent code suggestions and function completion, making it a valuable tool for debugging and error fixing. It includes features like intelligent suggestions, function completion, and documentation generation, helping developers maintain high code quality while efficiently addressing potential bugs.

With a free plan for individuals and a professional tier starting at $15 per month, CodeWhisperer is accessible to a broad range of developers.

Figstack

Figstack uses AI to deliver real-time insights into code performance, helping developers make informed decisions during debugging. It offers performance analysis features that help developers quickly assess code efficiency and resolve issues effectively.

Figstack is free to use, making it an accessible option for developers aiming to improve their coding workflow without extra costs.

AI-Driven Code Optimization

AI-driven code optimization tools automate improvement suggestions, making code refactoring faster and less prone to human error. These tools improve performance by reducing inefficiencies in existing code, contributing to a more efficient, high-performing codebase. By optimizing existing code, AI tools streamline the coding process while ensuring higher quality and better maintainability of software projects.

Codiga, for example, provides intelligent support for code optimization, including autocomplete suggestions and optimization features. This tool is especially beneficial for developers aiming to enhance their coding experience and identify potential vulnerabilities early via static code analysis. Codiga offers a free individual plan, with paid tiers starting at $14 per month, making it accessible to both solo developers and larger teams.

Practical Tips for Using AI Coding Tools

Integrating AI coding tools into your development workflow can significantly boost productivity and streamline processes. These tools excel at:

  • Performing repetitive tasks, freeing developers to focus on more complex aspects of software development.

  • Automating mundane tasks such as bug fixes and code optimization.

  • Reducing the mental burden on developers and boosting overall efficiency.

To get the most out of AI coding tools, integrating them with popular IDEs is essential. Many AI coding assistants support multiple IDEs, letting developers choose the environment that best fits their workflow.

Another practical tip is to use AI for documentation. AI-powered documentation tools automatically generate detailed documentation from code and comments, boosting productivity and ensuring vital information is easily accessible to team members. Tools like GitHub Copilot and OpenAI Codex automate the creation of technical documentation, translating code into human-readable formats and streamlining documentation workflows.

Integrate with Popular IDEs

Popular IDEs like Visual Studio Code and JetBrains support AI coding tools via plugins that enhance code generation and usability. Many AI coding assistants support multiple IDEs, letting developers choose the environment that best fits their workflow.

Integrating AI coding assistants with popular IDEs improves the development workflow by offering real-time suggestions and boosting code efficiency.

Utilize AI for Documentation

AI-powered documentation tools play a vital role in boosting productivity by automatically generating detailed documentation from code and comments. Tools like GitHub Copilot automate the creation of technical documentation, translating code into human-readable formats.

Using AI tools in project management can streamline documentation processes, ensuring vital information is easily accessible to team members and reducing time spent on manual documentation.

How Developers Are Programming with AI Coding Tools

Developers are increasingly integrating AI coding tools into their workflows to boost productivity and improve code quality. A recent study revealed that experienced developers may take 19% longer to complete tasks when using AI coding tools compared to traditional methods. This suggests that while AI tools offer significant assistance, human oversight remains essential to ensure code quality and accuracy.

Interestingly, developers accepted only about 44% of AI-generated code suggestions, reflecting a cautious approach to AI integration. Participants reported making significant modifications to AI-generated code, underscoring the importance of human judgment in coding. This balance between AI assistance and human oversight is vital for leveraging the full potential of AI coding tools.

Summary

In conclusion, AI coding tools are transforming the software development landscape by boosting productivity, improving code quality, and enriching learning experiences. From AI-powered code generation to advanced debugging and error fixing, these tools provide invaluable support to developers of all skill levels. By integrating AI into their workflows, developers can focus more on creative problem-solving and less on repetitive tasks, ultimately driving more efficient and innovative software development.

FAQ

What are the best artificial intelligence tools for coding in 2025?

What are the best artificial intelligence tools for coding in 2025?

What are the best artificial intelligence tools for coding in 2025?

How can I use artificial intelligence to write or debug code?

How can I use artificial intelligence to write or debug code?

How can I use artificial intelligence to write or debug code?

Which artificial intelligence coding tools support multiple programming languages?

Which artificial intelligence coding tools support multiple programming languages?

Which artificial intelligence coding tools support multiple programming languages?

Can artificial intelligence help me learn how to code faster?

Can artificial intelligence help me learn how to code faster?

Can artificial intelligence help me learn how to code faster?

What is the difference between coding with artificial intelligence and coding an artificial intelligence?

What is the difference between coding with artificial intelligence and coding an artificial intelligence?

What is the difference between coding with artificial intelligence and coding an artificial intelligence?