8/12/2025

Claude Sonnet 4 vs. GPT-5: Why Android Developers Are Choosing Claude for Kotlin Development

What’s up, fellow devs? Let's talk about something that's been on my mind a lot lately: the AI coding assistants we're all starting to rely on. It’s a wild time to be in software development, right? We've gone from arguing about a new framework or library to debating which AI is going to help us build them faster & better. The two heavyweights in the ring right now are Anthropic's Claude & OpenAI's GPT series.
Honestly, it feels like every other week there’s a new model that’s supposedly the "best ever" at coding. The latest buzz is all about Claude Sonnet 4 & the much-anticipated (and still a bit mysterious) GPT-5. Now, I’ve been in the trenches, building Android apps with Kotlin for a good while, & I've been playing with these AI tools since they first dropped. & here’s the thing: while the hype around GPT is always massive, I’m seeing more & more Android devs, myself included, quietly leaning on Claude Sonnet 4 for our day-to-day Kotlin work.
It's not about some single, killer feature. It's more of a gut feeling, a workflow thing. It’s about which tool gets the nuances of Android development, especially with Kotlin & Jetpack Compose. So, I wanted to really break down why this is happening. We'll get into the nitty-gritty, look at what the benchmarks say versus what real-world coding feels like, & explore why a growing slice of the Android community is betting on Claude. This isn't just about which AI can spit out the most code; it's about which one feels like a true partner in the complex, sometimes messy, world of Android development.

The Big Picture: Benchmarks vs. Real-World Feel

Okay, so let's get the numbers out of the way first, because everyone loves a good benchmark showdown. When you look at general coding benchmarks, it's a real neck-and-neck race. On something like the SWE-bench, which tests real-world software engineering tasks, GPT-5 (or its latest iteration) often edges out with a slightly higher score. I’ve seen figures like 74.9% for GPT-5 versus 72.7% for Claude Sonnet 4. That's impressive for GPT, no doubt. It suggests a raw power & a knack for tackling big, complex problems.
But here’s where it gets interesting for us Android folks. There’s a thing called Kotlin-Bench, & the results there have been a bit more back-and-forth. One Reddit thread was buzzing because GPT-5 had apparently just taken the top spot. But not long before that, another thread was crowning Claude Sonnet 4 as the king for Android dev based on the very same benchmark. What does that tell you? It tells me that these benchmarks are incredibly close & can fluctuate with each minor update. A single percentage point on a benchmark doesn’t always translate to a better experience when you’re deep in Android Studio, trying to figure out why your Compose preview isn't rendering.
This is the core of the debate for me: the difference between benchmark power & what I call "team productivity" or "developer flow." GPT-5, from what I've seen & read, is like a sledgehammer. It’s GREAT for huge, architectural refactors or when you're starting a project from scratch & need a ton of boilerplate generated. It’s aggressive & can make sweeping changes across your codebase.
Claude Sonnet 4, on the other hand, feels more like a scalpel. It’s more conservative with its edits, often making what users have described as "surgical" patches. It touches fewer files & aims for minimalist, precise changes. For an experienced developer working on a mature, complex Android project, this is often EXACTLY what you want. You don't always need an AI to rewrite half a module; you need it to find the one-line fix that’s been bugging you for hours.
I came across a great comment on a forum that summed it up perfectly. A developer mentioned that for their big monorepo, Claude’s precision was "gold," whereas for a brand new, greenfield project, GPT-5's more aggressive style could be faster. That really resonates with my experience in Android development. Our projects are rarely simple; they're a tangled web of activities, fragments, view models, repositories, & now, composables. A tool that understands the importance of not breaking things is incredibly valuable.

Getting into the Kotlin & Jetpack Compose Weeds

This is where the rubber really meets the road for Android developers. It’s not just about general coding ability; it's about a deep understanding of the Kotlin language & the entire Android ecosystem, especially the modern toolkit with Jetpack Compose.
Here's a sentiment I’ve seen echoed across a few Reddit threads & developer forums: OpenAI's models, while powerful, can sometimes feel a bit… generic when it comes to Android. One developer on Reddit put it bluntly, saying that OpenAI is "not very good in Android with Jetpack Compose," & that "Claude is great for Native Android." This isn't a knock on GPT's overall intelligence; it's more about its training data & focus. It’s a generalist, & a damn good one, but sometimes you need a specialist.
Another developer mentioned that when they ask for code, Gemini (Google's model, but the sentiment applies to other generalist AIs) often "throws lots of extra code" & includes definitions for things that aren't needed. This is a classic sign of an AI that is trying to be helpful but doesn't fully grasp the context of an existing Android project. It's like asking a colleague for a small tweak & having them send you back a completely refactored file. It’s not helpful & it creates more work.
Claude Sonnet 4 seems to have a better handle on this. It's been described as being more "leaner & more narrowly focused," addressing feedback about older models being "overeager." When you're working with Jetpack Compose, this is a HUGE deal. Compose is all about small, reusable functions. You want an AI that can generate a clean, self-contained
1 @Composable
function, not one that tries to restructure your entire screen for you.
I saw a YouTube video where a developer was coding with Claude Sonnet 4 & was impressed that it didn't just dump a bunch of dummy data into the code. It understood the request was for the structure, not the content. It even fixed a JSON formatting error without being asked, a small but intelligent touch that shows a deeper understanding of the task at hand. This is the kind of smart assistance that actually saves you time.
Think about the way we build UIs with Compose. It’s a declarative paradigm that’s very different from the old XML way of doing things. It involves a deep understanding of state management (
1 remember
,
1 mutableStateOf
), recomposition, & modifiers. A generic AI might be able to generate a
1 Column
with a few
1 Text
elements, but can it understand how to properly hoist state to a ViewModel? Can it create a complex custom layout with modifiers in a way that is efficient & avoids unnecessary recompositions? The consensus I'm seeing is that Claude Sonnet 4 has a slight edge here, likely because it’s been fine-tuned more specifically on high-quality coding examples that include these modern Android patterns.

The IDE Integration & Workflow Experience

This is another area where the experience can differ significantly & where Claude is making some serious inroads. For a long time, the workflow for using AI in coding was clunky. You’d have your IDE open on one screen & a browser with a chatbot on another. You'd copy code back & forth, losing context & wasting time.
That’s changing fast, & the integration of these models directly into our IDEs is a game-changer. Claude Sonnet 4 is now available directly in IDEs like VS Code & JetBrains IDEs (which includes Android Studio, of course) through integrations like GitHub Copilot. This isn't just about having a chat window in your editor. The integration is much deeper. It has context awareness of your entire project structure, it understands the files you are currently working on, & it can provide much better code suggestions because of it.
Early users of this deep integration report that it feels fundamentally different. It's like having an experienced pair programmer sitting next to you who instantly gets your project's context. They can help you debug without you having to paste error logs, they can suggest improvements as you type, & they can help with refactoring across multiple files. This is where the "surgical precision" of Claude Sonnet 4 really shines. When an AI has full context of your app's navigation graph, your dependency injection setup, & your data models, it can make much more intelligent & less disruptive suggestions.
Now, GPT models are also being integrated into IDEs, but the user experience reports I've seen suggest that Claude’s recent push with partners like Sourcegraph (who make Cody) is giving it an edge in the developer experience department. Cody, for example, is an AI assistant that can use Claude Sonnet 4 & is designed to understand your entire codebase for smarter autocompletions & refactoring. This is HUGE for Android projects, which are often large & complex.
Imagine you're trying to add a new feature that touches your UI, your ViewModel, your Repository, & your local database. A tool like Cody, powered by Claude, can reason about all those layers simultaneously. This is a massive leap from just asking a chatbot to generate a single function.
This tight integration also ties into the idea of creating a seamless developer workflow. As developers, we want to stay "in the zone" as much as possible. Every time you have to switch context from your code to a browser & back again, you lose a little bit of that focus. Having a powerful, context-aware AI directly in Android Studio, an AI that feels like it understands Kotlin & Compose on a deep level, is the holy grail. & right now, it feels like Claude Sonnet 4 is getting closer to that ideal for the Android community.

Beyond Code Generation: The Rise of AI-Powered Business Solutions

Here's something else to consider: the role of these AI models is expanding beyond just helping us write code. They are becoming the backbone of the very products we build. This is especially true when it comes to things like customer service & user engagement.
Let's say you're building an e-commerce app or a SaaS product. A huge part of the user experience is support. Users are going to have questions, they're going to run into issues, & they're going to want answers FAST. In the past, this meant hiring a large support team or using a clunky, frustrating chatbot that could only answer a few pre-programmed questions.
This is where conversational AI platforms are making a massive difference. For instance, a platform like Arsturn helps businesses create custom AI chatbots trained on their own data. This is a game-changer. Imagine building an app & being able to offer your users a 24/7 support chatbot that can provide instant, accurate answers because it's been trained on your specific product documentation, FAQs, & support tickets. That’s not just a nice-to-have feature; it’s a powerful tool for improving user satisfaction & retention.
The same AI technology that helps us write better Kotlin code can be leveraged to create these intelligent, helpful user-facing experiences. When we're evaluating models like Claude & GPT, it’s worth thinking about this broader context. A model that excels at reasoning & providing precise, context-aware answers (like Claude Sonnet 4 is often described) is also going to be a great foundation for a customer support chatbot.
As developers, we're not just building features in a vacuum. We're building solutions for businesses. We're trying to help them connect with their customers in more meaningful ways. This is where a tool like Arsturn comes into the picture as a business solution. It allows companies to take the power of advanced AI and apply it directly to their customer engagement challenges. By using a no-code platform to build AI chatbots trained on their own data, businesses can boost conversions, provide personalized experiences, & free up their human support teams to handle more complex issues. It's about using AI to automate the automatable, so humans can focus on the irreplaceable.
When I’m thinking about which AI ecosystem to invest my time in, I'm not just thinking about which one can help me code faster today. I'm also thinking about which one provides the tools & platforms that will help me build the smart, AI-powered applications of tomorrow. The move towards more specialized, business-focused AI solutions is a clear trend, & it's something every developer should be keeping an eye on.

The Human Element: Why "Feel" Matters

At the end of the day, choosing a coding assistant is a personal decision. It comes down to a lot more than just benchmarks & feature lists. It comes down to "feel." Does the tool's output match your coding style? Does it save you time, or does it create more work by forcing you to constantly correct its mistakes?
I think one of the reasons many Android developers are gravitating towards Claude Sonnet 4 is that it feels more like a collaborator & less like a code-generating machine. The emphasis on "surgical" edits & precise reasoning makes it feel like it respects the existing codebase. It's not trying to show off how much code it can write; it's trying to help you solve a specific problem in the most efficient way possible.
There's also the issue of what I call "AI fatigue." We've all had those moments where you're arguing with an AI, trying to rephrase your prompt for the fifth time to get it to understand what you want. It's exhausting. A model that can grasp your intent more accurately from the get-go is worth its weight in gold. The feedback about Claude Sonnet 4 being more "steerable" & better at following instructions is a big deal in this regard. It leads to a less frustrating, more productive coding session.
I’ve also seen comments from developers who appreciate that Claude seems to be more conservative. In a complex Android app, a single, seemingly innocent change can have ripple effects that cause unexpected bugs. An AI that is more cautious & makes smaller, more targeted changes is often a safer bet, especially in a team environment where code needs to be reviewed & maintained by others.
This isn't to say that GPT-5 won't be an incredible tool. OpenAI has consistently pushed the boundaries of what's possible with AI, & I have no doubt that their next model will be amazing. But for the specific, nuanced work of modern Android development with Kotlin & Jetpack Compose, the current sentiment seems to be that Claude Sonnet 4 has found a sweet spot. It combines strong coding capabilities with a more refined, developer-friendly approach that fits well with the complexities of the Android platform.
It's a pretty exciting time to be a developer. These tools are evolving at an incredible pace, & the competition between them is only going to lead to better products for us. Whether you're Team Claude, Team GPT, or just happy to use whatever works best for the task at hand, there's no denying that AI is changing the way we build software.
Hope this was helpful! I'm really curious to hear what your experiences have been. Are you using an AI assistant for your Kotlin development? Which one has been your go-to? Let me know what you think. It feels like we're all figuring this out together, & sharing our experiences is the best way to navigate this new landscape.

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