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Coffee With Developers • Aug 17, 2026

Validating Real-World Usefulness of AI Models - Julia Kasper

Julia Kasper

There is no universally superior AI model. Frontend developers prefer Claude, while backend engineers favor GPT. Julia Kasper explains how to rigorously evaluate AI for your IDE.

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#1 about 2 min

Introduction to AI features in Visual Studio Code

An overview of launching AI models and Copilot capabilities inside the code editor.

#2 about 2 min

Developer adoption of integrated AI chat features

How traditional developers and AI-first coders utilize new integrated chat interfaces differently.

#3 about 3 min

Integrating new third-party AI models into environments

How the team manages quick turnarounds and policy restrictions for incoming AI model releases.

#4 about 3 min

Evaluating non-deterministic AI models with offline testing

Using traditional assertion-based test scripts to measure the reliability of non-deterministic AI responses.

#5 about 3 min

Choosing AI models based on task and personality

Balancing token costs and task efficiencies by evaluating benchmarks and specific model characteristics.

#6 about 2 min

Tracking model quality improvements and potential saturation

Observing incremental performance gains across updates despite a sense of overall AI capability saturation.

#7 about 2 min

Connecting custom local models versus optimized built-in providers

How developers can bring their own API keys while native models benefit from specialized system prompt optimization.

#8 about 3 min

Preparing system prompts and evaluating models before launch

Refining prompts and running internal dogfooding sessions to validate model quality before public release.

#9 about 1 min

Performing local A/B testing across multiple AI agents

Running parallel sessions with different local and remote agents to directly compare model outputs.

#10 about 2 min

Inspecting open-source system prompts to understand model behavior

Reviewing public prompts allows external contributors to suggest tweaks and better understand AI nuance.

#11 about 2 min

Navigating user questions on selecting the optimal model

Addressing developer inquiries by recommending the latest updates and switching models based on task context.

#12 about 2 min

Maintaining an open-source core amidst proprietary editor forks

Navigating the challenges of third-party forks while continuing to value the open-source community mindset.

#13 about 3 min

Leveraging AI to lower the barrier for external contributions

Using AI tools to explain large codebases empowers external developers to make their first pull requests.

Matching moments

1:48 min

Exploring AI integrations in modern agile development workflows

Markus Walker Markus Walker · World Congress 2023

2:41 min

Leveraging AI tooling for accelerated learning and productivity

Dan Mindru · Coffee With Developers

1:56 min

Analyzing cloud-based AI code completion architectures

Daniel Savenkov Daniel Savenkov · World Congress 2024

5:16 min

Motivations for adopting AI to enhance developer productivity

1:55 min

Shifting developer workloads and realistic AI productivity gains

Chris Heilmann +2 · LIVE

2:26 min

Customizing developer tools and integrating domain-specific AI agents

Francisco Carneiro Francisco Carneiro · World Congress 2025

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September 23, 2026 · 13:40–14:10

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Java enthusiast and Special agent for Team Rockstars IT

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