Google's AI Coding Tools: The Dawn of 'Reasoning Models'

New research reveals a pivotal shift in developer adoption of AI tools, driven by advanced 'thinking models' and improved 'tool-calling' capabilities.

Google's project manager for developer tools, Ryan Salva, highlights a significant increase in AI tool adoption by developers since April 2024. This surge is attributed to the emergence of more sophisticated 'reasoning models' and enhanced 'tool-calling' features. These advancements allow AI to self-correct and integrate external information, fundamentally changing how developers approach coding.

Katie Rowan

By Katie Rowan

September 28, 2025

4 min read

Google's AI Coding Tools: The Dawn of 'Reasoning Models'

Key Facts

  • The median date for developers starting to use AI tools was April 2024.
  • This adoption surge correlates with the release of Claude 3 and Gemini 2.5.
  • Advanced AI models are now better at 'reasoning' and 'tool-calling'.
  • Tool-calling allows AI to leverage external information and self-correct.
  • Google's developer trends survey focused on 'agentic developers' and AI tools.

Why You Care

Ever wonder if AI is truly changing how software is built? What if a single year marked the real turning point for AI in coding? Google’s latest developer trends report reveals a fascinating shift, showing a dramatic increase in AI tool adoption. This isn’t just about automation; it’s about AI gaining ‘reasoning’ abilities. Understanding this evolution is crucial for your future in tech, whether you’re a developer or just curious about AI’s impact.

What Actually Happened

Ryan Salva, Google’s project manager for developer tools, offers a unique perspective on AI’s influence on coding. Formerly with GitHub and Microsoft, Salva now oversees tools like Gemini CLI. His team recently released findings from Google’s annual developer trends survey, which focused heavily on AI tools, according to the announcement. The research specifically examined how “agentic developers” – those willing to let AI take a more proactive role – are approaching programming. A key finding was the median date for developers starting to use AI tools, which was April 2024, the research shows. This date aligns with the release of models like Claude 3 and Gemini 2.5, marking “the dawn of the reasoning or thinking models,” as Salva explained.

Why This Matters to You

This shift isn’t just a technical detail; it has profound implications for how you work and learn. The introduction of “reasoning models” means AI can now do more than just generate code. It can understand context and problem-solve more effectively. This capability is enhanced by improved “tool-calling” – the AI’s ability to interact with external systems. Imagine an AI that can not only write code but also test it, debug it, and even search for relevant information online. This makes AI a more active partner in the creation process.

Key Capabilities of Modern AI Coding Tools:

  • Problem Solving: AI can use external information to solve complex coding challenges.
  • Self-Correction: Models can identify and fix their own errors during the creation process.
  • Integration: AI can interact with various tools like compilers and unit testers.

For example, think of a scenario where you’re building a new feature. Instead of just asking AI to write a function, you can now ask it to implement the feature, run tests, and report back on any failures. This level of autonomy can dramatically speed up your workflow. How might these AI capabilities change your daily tasks or learning journey? As Ryan Salva stated, “tool-calling really is the important piece that gave models the ability to self-correct as they move along.”

The Surprising Finding

One of the most surprising revelations from Google’s research concerns the rapid adoption timeline. The median date for developers beginning to use AI tools was April 2024, the study finds. This is remarkably recent, suggesting that the true impact of AI in coding is just beginning to unfold. This date corresponds neatly with the release of new models like Claude 3 and Gemini 2.5, as mentioned in the release. Before these models, AI coding assistants were often seen as helpful but limited. However, the advent of “reasoning or thinking models” changed this perception significantly. The team revealed that around this time, AI models also became “much better at tool-calling.” This capability allows AI to interact with external systems like compilers or unit tests, which is crucial for real-world coding tasks. It challenges the assumption that AI’s integration into coding would be a gradual, incremental process. Instead, it appears to have been a sudden acceleration driven by specific technological advancements.

What Happens Next

The rapid evolution of AI coding tools suggests a dynamic future for software creation. We can expect to see even more “reasoning models” emerging in the next 12-18 months, according to industry trends. These models will likely offer enhanced “tool-calling” capabilities, further blurring the lines between human and AI-driven coding. For example, imagine AI assistants that can autonomously manage entire creation cycles, from initial specification writing to deployment. Your role as a developer might shift towards higher-level design and oversight. To stay ahead, consider experimenting with tools like Gemini CLI or Claude Code now. These tools offer a glimpse into the future of coding. The industry implications are vast, potentially leading to faster creation cycles and more complex software solutions. Product managers, for instance, are already using AI to draft specifications and requirements documents, the company reports. This trend will only intensify, impacting every aspect of software creation.

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