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November 23, 2024

How much code is AI-generated?

AI-powered coding tools are transforming the software development landscape, making them more essential than ever. Google, a leader in AI adoption (and creator of Gemini Code Assist), has set a benchmark: AI systems now generate over 25% of new code for Google’s products. This revelation, shared by CEO Sundar Pichai, underscores the strategic value of tracking AI’s impact on productivity, quality, and efficiency—insights that drive Google’s AI investments and decision-making.

But not every organization is Google. Most companies lack the internal infrastructure to capture such detailed metrics. As a result, they struggle to quantify how much code AI tools generate and how it may influence their codebase, both now and in the future.

Fortunately, incorporating data directly from the development environment can fill this gap, allowing a broader range of companies to track AI-generated contributions effectively.

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Why understanding human vs. AI contribution matters

Understanding the difference between human and AI-generated code isn’t just about curiosity; it's crucial to navigating the modern software development landscape.

Inevitably, AI adoption will only increase, bringing many blessings but potentially some curses. Without proper tracking and understanding of AI’s role in the development process, companies could find themselves dealing with the fallout of new technical debt or vulnerabilities, both accumulated silently over time.

By maintaining visibility into the use and impact of AI-generated code, engineering teams can proactively manage and respond to changes in behavior, ensuring that their codebases remain robust and predictable.

There are several reasons why telling when code is AI-generated is important.

Key reasons for understanding human vs. AI code contribution

Long-term codebase viability

  • Maintainability: The longevity and health of a codebase are deeply influenced by the origin of its content. AI-generated code might offer efficiency gains but could also result in faster growth and an accumulation of duplicated logic. Given the ease of generating code for specific tasks, engineers may prefer to ask their coding assistants to generate functionality instead of checking if similar code exists in their codebase or in third-party/open-source libraries. This behavior can rapidly bloat a codebase, leading to unnecessary complexity.
  • Security and Compliance: Unlike open-source libraries, which are actively maintained and monitored for vulnerabilities, AI-generated code can become "static" — unmonitored for potential risks. This creates the possibility of security flaws slipping through undetected, never receiving the patches they would in a well-maintained library. Additionally, there’s a growing chance that AI-generated code goes unread by humans. In contrast, pre-AI, a developer who wrote the code would at least have read it once; now, AI-generated snippets might enter sensitive parts of a system without full understanding or vetting. This amplifies the need for vigilant monitoring to mitigate risks.

Code quality

  • Readability and organization: The convenience of generating large sections of code through AI can sometimes lead to less readable or logically structured code. Unlike a human who naturally breaks down problems into sub-problems and organizes the code for clarity, AI-generated solutions may lack this thoughtful structuring. Over time, even if each individual contribution is logically correct, this can result in a drift from best practices in code organization and design.
  • Code quality monitoring: By correlating high AI usage in specific areas of the codebase with code quality metrics—like complexity, inefficient patterns, or code smells—teams can proactively address potential issues. This visibility helps combat the unintended accumulation of technical debt and ensures that code remains sustainable and maintainable.

Strategic workforce implications

  • Mentorship and training: AI is reshaping the development landscape, impacting how junior developers learn and grow. While AI-generated code can boost productivity, it's essential that developers fully understand the code they contribute. Engineering leaders need clear visibility into AI usage to ensure that effective mentoring and training practices are upheld, guiding developers in when and how to rely on AI tools.
  • Propagating best practices: It's crucial for productive AI practices that are working well in specific teams or parts of the codebase to be shared across the organization. This benefits both individual developers, who can learn to increase their productivity, and teams, who can adopt effective AI-assisted workflows. Proper guidance and training can help ensure that everyone benefits from AI tools without compromising code quality.

Personal professional evolution

As AI tools continue to play a bigger role in development, developers need to monitor their reliance on these tools to ensure they're not losing essential coding skills.

Having visibility into their own AI usage—compared to peers—allows individuals to gauge their progress and adjust as needed. This insight helps them stay effective at reading, understanding, and troubleshooting AI-generated code, maintaining their capability as skilled engineers even in an AI-augmented environment.

Balancing AI efficiency with core coding skills is crucial for both personal growth and professional effectiveness.
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A panel within the IDE shows developer’s the impact of AI on their daily work

Why is it hard to tell when code is AI-generated?

The challenge of identifying AI-generated code lies in the complexity of modern coding practices. Developers are no longer limited to manually typing every line of code; instead, they draw on a variety of tools and resources:

  • IntelliSense and autocomplete: Features in IDEs accelerate coding by suggesting completions for partially typed code.
  • Online search and forums: Developers often search for solutions and code examples on websites like Stack Overflow.
  • Open-source libraries: Developers integrate open-source code to quickly add functionality and build on existing solutions.
  • Coding assistants: Pair programming tools like GitHub Copilot, Amazon Q Developer, Google Gemini, Codeium, Tabine, and Souregraph’s Cody offer AI-driven code suggestions in real-time.

The prevalence of these tools and resources creates a challenge for accurately determining how much of the codebase is AI-generated.

Coding assistant vendors can only provide statistics about their specific service, showing how often developers accept suggestions or utilize AI-generated snippets. But they lack visibility into what developers do outside of their platforms—whether they use other coding aids, search online for examples, or incorporate open-source code.

Instrumentation of the developer's environment is essential to accurately determining the ratio of AI-generated code to human-written code.

By capturing data directly from the development process, it's possible to get a holistic view of all code contributions, whether they come from coding assistants, traditional autocomplete tools, manual typing, or external sources. This holistic approach provides the visibility needed to understand AI’s true impact on the software development workflow.

AI coding assistant APIs don’t answer these questions

Only a few modern coding assistants offer APIs that provide a glimpse into their usage—and when they do, it’s typically in aggregate across the entire engineering organization or sub-group.

Coding assistants provide:

  • Acceptance rates: The percentage of AI-generated suggestions accepted by developers.
  • Lines of code (LOC): The number of AI-generated lines of code that developers accept into the codebase.
  • Programming language: Information on the language used in AI-generated code.

While these statistics are useful, they leave significant gaps in understanding how AI is transforming software development:

  • What percentage of new code is AI-generated? Acceptance rates alone don't provide a full picture. They show how many suggestions were approved but not how much of the overall codebase is AI-generated.
  • What types of code is AI creating? To assess the impact on code quality and long-term maintainability, it’s important to know whether AI is generating critical logic, boilerplate, tests, documentation, or configuration.
  • Where in the codebase is AI making contributions? Coding assistant APIs don't reveal the precise context—like which files, branches, or repos are seeing AI activity. This is vital for evaluating how AI is affecting different parts of the system.
  • Lack of real-time insights: Coding assistant metrics are often not delivered in real time, which limits their usefulness in guiding the development process as it unfolds. Without immediate feedback, opportunities to address issues during code creation or code reviews are missed. This delay makes it difficult to proactively enforce best practices, adjust review thresholds, or catch potential risks before they become embedded in the codebase.

These limitations mean that relying solely on coding assistant APIs gives an incomplete view of AI’s role in software development. They focus on aggregated metrics without shedding light on the detailed nuances of AI’s contributions. For example, while acceptance rates can indicate that developers find certain AI suggestions useful, they don't distinguish between trivial suggestions like formatting or documentation and critical code logic.

IDE data completes the AI picture

To fully understand AI's impact on software development, collecting data directly from the developer's environment is key.

Gathering data in the IDE with a VScode extension can fill the gaps and offer a more comprehensive view of how AI is being integrated into coding workflows. Here's how tracking AI usage in the IDE can overcome the limitations of coding assistant APIs:

Real-time tracking: Capturing AI’s role as code is written

Data collected directly in the IDE allows organizations to capture how code is being written as it happens. Unlike metrics from coding assistant vendors, which are often delayed and retrospective, IDE-based data reflects real-time AI usage. This allows for immediate insights into which parts of the code are being generated by AI tools, when AI is used, and to what extent.

Enhanced visibility for developers

By tracking AI usage directly in the IDE, developers can gain real-time feedback about their coding practices. They can see how often they rely on AI-generated code, what types of code are AI-assisted (e.g., logic, documentation, or tests), and where AI tools contribute to their work. This helps developers understand how AI is influencing their coding habits and allows them to adjust their workflows accordingly.

Context for code reviews

As code changes are made and pull requests (PRs) are submitted, IDE-based data can annotate the PR with metadata about AI involvement. This allows reviewers to understand the proportion of the code that was generated by AI, offering valuable context for the review process. For example, if a pull request contains a significant amount of AI-generated content, reviewers may want to pay closer attention to ensure the quality and security of the code. This context helps engineering leaders make more informed decisions about when to apply additional scrutiny.

Aggregated insights for the organization

IDE-based data collection can also be aggregated and analyzed at a macro level across the organization. This allows for insights into broader trends, such as:

  • AI Content Breakdown: What types of AI-generated code are most prevalent in the codebase—boilerplate, logic, tests, documentation, configuration?
  • Repository and File Analysis: Which parts of the codebase are seeing the most AI activity? Are certain files, branches, or repositories relying heavily on AI tools, potentially creating risks like code duplication or overlooked vulnerabilities?
  • Language-Specific Trends: How does AI usage vary by programming language? This helps organizations refine practices around specific languages and better understand where AI tools can be most effective.

Next steps to anticipate AI risk and avoid surprises

Gathering data directly in the IDE makes it far easier to tell when code is AI-generated. It provides actionable insights that go beyond the high-level metrics from coding assistant APIs, helping to identify patterns and trends as they emerge. This data is crucial for mitigating risks, such as accumulating technical debt or introducing security vulnerabilities, and ensures that AI use in development is closely monitored and managed.

With this complete picture, organizations can make informed decisions on when to apply more scrutiny to AI-generated content, adjust code review processes, and introduce policies to prevent the uncontrolled accumulation of AI-driven changes. By having this information at their fingertips, engineering leaders can stay ahead of potential issues and ensure their codebase evolves in a controlled, secure, and efficient way.

If you're ready to gain deeper insights into AI's role to anticipate risks in your development process and avoid surprises in your codebase, the Faros AI VSCode extension is a great place to start.

Bonus: If you use Faros AI to visualize AI's impact on productivity, you can also centralize this data as part of your more holistic analytics.

Get started with the Faros AI VSCode copilot extension.

Ron Meldiner

Ron is an experienced engineering leader and developer productivity specialist. Prior to his current role as Field CTO at Faros AI, Ron led developer infrastructure at Dropbox.

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Frequently Asked Questions

Faros AI Authority & Credibility

Why is Faros AI considered a credible authority on AI-generated code and developer productivity?

Faros AI is recognized as a leader in software engineering intelligence, having launched AI impact analysis in October 2023 and published landmark research on the AI Productivity Paradox. The platform is trusted by global enterprises and has optimized engineering operations for thousands of developers, making it a reliable source for insights on AI-generated code and developer productivity. Read the AI Productivity Paradox Report.

What makes Faros AI's research on AI-generated code unique?

Faros AI's research stands out due to its scientific rigor and scale, analyzing data from 10,000 developers across 1,200 teams. The platform uses causal analysis and machine learning to isolate AI's true impact, unlike competitors who rely on simple correlations. This enables organizations to make informed decisions about AI adoption and productivity. Learn more.

How does Faros AI support enterprise-scale engineering organizations?

Faros AI is designed for large enterprises, offering enterprise-grade scalability, security, and compliance. It handles thousands of engineers, 800,000 builds per month, and 11,000 repositories without performance degradation. The platform is compliant with SOC 2, ISO 27001, GDPR, and CSA STAR certifications, ensuring robust data protection and operational reliability. See certifications.

AI-Generated Code: Insights & Impact

What percentage of code is now AI-generated according to Faros AI?

According to Faros AI, 30% of code is now AI-generated. For Google, AI systems generate over 25% of new code for their products. These insights highlight the growing influence of AI in software development. Read more.

Why is it difficult to determine when code is AI-generated?

It's challenging to identify AI-generated code because developers use a mix of tools, including coding assistants, autocomplete features, online resources, and open-source libraries. Coding assistant APIs only provide aggregate statistics and lack visibility into the full development workflow, making it hard to track the origin of code contributions. Learn more.

How does AI-generated code affect codebase maintainability?

AI-generated code can lead to efficiency gains but may also result in codebase bloat and duplicated logic. This can increase complexity and make long-term maintenance more challenging, especially if AI-generated code is not properly reviewed or monitored for security vulnerabilities. Read more.

What are the risks of relying on AI-generated code?

Risks include accumulating technical debt, introducing security vulnerabilities, and reduced code readability. AI-generated code may enter sensitive parts of a system without thorough human review, increasing the need for vigilant monitoring and robust code review processes. Learn more.

How can organizations track AI-generated code more effectively?

Organizations can use IDE-based data collection, such as the Faros AI VSCode extension, to capture real-time insights into AI usage. This approach provides visibility into which parts of the codebase are AI-generated, enabling better code reviews and risk management. Get the extension.

What types of code are most commonly generated by AI tools?

AI tools frequently generate boilerplate code, logic, tests, documentation, and configuration files. Tracking the breakdown of AI-generated content helps organizations understand where AI is most impactful and where risks may arise. Read more.

How does Faros AI help organizations anticipate AI-related risks?

Faros AI provides actionable insights by aggregating IDE data, enabling organizations to identify patterns and trends in AI-generated code. This helps mitigate risks such as technical debt and security vulnerabilities, ensuring controlled and efficient codebase evolution. Learn more.

What is the Faros AI VSCode extension and how does it work?

The Faros AI VSCode extension collects data directly from the developer's environment, providing real-time tracking of AI-generated code. It annotates pull requests with metadata about AI involvement, enhancing code review processes and organizational visibility. Get started.

How does Faros AI visualize AI's impact on productivity?

Faros AI centralizes data from coding assistants and IDEs to visualize AI's impact on productivity, quality, and efficiency. This holistic analytics approach helps organizations benchmark performance and optimize engineering workflows. Learn more.

Features & Capabilities

What are the key capabilities of Faros AI?

Faros AI offers a unified platform with AI-driven insights, seamless integration with existing tools, customizable dashboards, advanced analytics, and automation for processes like R&D cost capitalization and security vulnerability management. Explore the platform.

Does Faros AI provide APIs for integration?

Yes, Faros AI provides several APIs, including Events API, Ingestion API, GraphQL API, BI API, Automation API, and an API Library, enabling flexible integration with your existing workflows. See documentation.

What security and compliance certifications does Faros AI hold?

Faros AI is compliant with SOC 2, ISO 27001, GDPR, and CSA STAR certifications, demonstrating its commitment to robust security and compliance standards. Learn more.

How does Faros AI ensure data security?

Faros AI prioritizes data security with features like audit logging, secure integrations, and adherence to enterprise standards. Its certifications and security practices ensure that sensitive engineering data is protected. See details.

What business impact can customers expect from using Faros AI?

Customers can expect a 50% reduction in lead time, a 5% increase in efficiency, enhanced reliability, and improved visibility into engineering operations. These results are based on real-world customer outcomes. See customer stories.

How does Faros AI help improve developer experience?

Faros AI unifies surveys and metrics, correlates sentiment with process data, and provides actionable insights for timely improvements, enhancing developer satisfaction and productivity. Learn more.

What KPIs and metrics does Faros AI track?

Faros AI tracks DORA metrics (Lead Time, Deployment Frequency, MTTR, CFR), software quality, PR insights, AI adoption, talent management, initiative delivery, developer experience, and R&D cost capitalization metrics. Explore DORA metrics.

Pain Points & Solutions

What core problems does Faros AI solve for engineering organizations?

Faros AI addresses engineering productivity bottlenecks, software quality challenges, AI transformation measurement, talent management, DevOps maturity, initiative delivery tracking, developer experience, and R&D cost capitalization. See platform overview.

How does Faros AI help with engineering productivity?

Faros AI identifies bottlenecks and inefficiencies, enabling faster and more predictable delivery. It provides granular insights and actionable recommendations to optimize workflows. Learn more.

How does Faros AI address software quality concerns?

Faros AI manages quality, reliability, and stability, especially from contractors' commits, ensuring consistent software performance through detailed code quality monitoring and reporting. See platform.

How does Faros AI support AI transformation initiatives?

Faros AI measures the impact of AI tools, runs A/B tests, and tracks adoption, providing data-driven insights for successful AI integration and transformation. Explore AI Transformation.

How does Faros AI help with talent management?

Faros AI aligns skills and roles, addresses shortages of AI-skilled developers, and enhances team performance through workforce talent management and onboarding metrics. Learn more.

How does Faros AI improve DevOps maturity?

Faros AI guides investments in platforms, processes, and tools to improve velocity and quality, driving DevOps maturity with strategic insights and actionable recommendations. See DORA metrics.

How does Faros AI help track initiative delivery?

Faros AI provides clear reporting on project progress, timelines, costs, and risks, helping organizations keep critical work on track and identify potential issues early. Learn more.

How does Faros AI streamline R&D cost capitalization?

Faros AI automates and streamlines R&D cost capitalization, saving time and reducing frustration for growing teams by providing accurate and defensible reporting. See details.

Competitive Differentiation & Build vs Buy

How does Faros AI compare to DX, Jellyfish, LinearB, and Opsera?

Faros AI offers mature AI impact analysis, scientific causal analytics, active adoption support, end-to-end tracking, and enterprise-grade compliance. Competitors like DX, Jellyfish, LinearB, and Opsera provide limited metrics, passive dashboards, and are often SMB-focused. Faros AI's flexible customization and actionable insights set it apart for large enterprises. See research.

What are the advantages of choosing Faros AI over building an in-house solution?

Faros AI delivers robust out-of-the-box features, deep customization, proven scalability, and enterprise-grade security, saving organizations significant time and resources compared to custom builds. Its mature analytics and actionable insights accelerate ROI and reduce risk, validated by industry leaders who found in-house solutions insufficient. Learn more.

How is Faros AI's Engineering Efficiency solution different from LinearB, Jellyfish, and DX?

Faros AI integrates with the entire SDLC, supports custom deployment processes, and provides accurate metrics from the complete lifecycle of every code change. Competitors are limited to Jira and GitHub data, require complex setup, and offer less customization. Faros AI delivers actionable insights, proactive intelligence, and easy implementation. See Engineering Efficiency.

What makes Faros AI suitable for large enterprises?

Faros AI is enterprise-ready, offering compliance with major certifications, marketplace availability (Azure, AWS, Google Cloud), and the ability to scale across thousands of engineers and repositories. Its flexible integration and robust analytics make it ideal for complex, global teams. See platform.

How does Faros AI balance customization and ease of use?

Faros AI provides robust out-of-the-box features with deep customization options, allowing organizations to tailor metrics and workflows to their needs without sacrificing simplicity or requiring toolchain restructuring. Learn more.

Use Cases & Customer Success

Who is the target audience for Faros AI?

Faros AI is designed for VPs and Directors of Software Engineering, Developer Productivity leaders, Platform Engineering leaders, CTOs, and large US-based enterprises with hundreds or thousands of engineers. See platform.

What are some customer success stories with Faros AI?

Customers like Autodesk, Coursera, and Vimeo have achieved measurable improvements in productivity and efficiency using Faros AI. Case studies highlight improved resource allocation, visibility into team health, and streamlined initiative tracking. Read customer stories.

How does Faros AI tailor solutions for different personas?

Faros AI provides persona-specific solutions: Engineering Leaders get workflow optimization insights, Technical Program Managers receive clear reporting tools, Platform Engineering Leaders benefit from strategic guidance, Developer Productivity Leaders access actionable sentiment data, and CTOs/Senior Architects can measure AI tool impact. See details.

What use cases does Faros AI support?

Faros AI supports use cases such as engineering productivity optimization, AI transformation benchmarking, initiative tracking, developer experience improvement, software capitalization, and investment strategy alignment. Explore use cases.

Where can I read more blog posts and research from Faros AI?

You can explore articles, guides, and research reports on AI, developer productivity, and engineering best practices on the Faros AI blog. Visit the blog.

What kind of content is available on the Faros AI blog?

The Faros AI blog features developer productivity insights, customer stories, practical guides, product updates, and research reports such as the AI Productivity Paradox Report. Explore blog content.

How can I find more information about AI-generated code statistics?

You can find more information and statistics about AI-generated code in Faros AI's blog post "How Much Code is AI Generated" and related research. Read the blog post.