Google iconGoogleSep 25, 2026 ~1 min source read

Best practices guide for customizing Gemini models via Reinforcement Learning (RL)

Reinforcement learning (RL) has been a keystone of modern LLM post-training, but it demands large training clusters and access to model internals that external customers can't have with proprietary models like Gemini. In this guide, we will walk through practical best practices for using RL fine-tuning service.

Best practices guide for customizing Gemini models via Reinforcement Learning (RL)

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Reinforcement learning (RL) has been a keystone of modern LLM post-training, but it demands large training clusters and access to model internals that external customers can't have with proprietary models...

Instead of authoring a large set of gold examples, you write one program that scores a response and the service improves the model against it — unlocking tasks that are hard to demonstrate but easy to...

In this guide, we will walk through practical best practices for using RL fine-tuning service.

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Reinforcement learning (RL) has been a keystone of modern LLM post-training, but it demands large training clusters and access to model internals that external customers can't have with proprietary models like Gemini. In this guide, we will walk through practical best practices for using RL fine-tuning service. Instead of authoring a large set of gold examples, you write one program that scores a response and the service improves the model against it — unlocking tasks that are hard to demonstrate but easy to verify: you can't hand-write the ideal SQL for every schema, but you can run the query and check the result.

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  • Instead of authoring a large set of gold examples, you write one program that scores a response and the service improves the model against it — unlocking tasks that are hard to demonstrate but easy to...

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