Unlock Gemini’s reasoning: A step-by-step guide to logprobs on Vertex AI- Google Developers Blog

Introduces the `logprobs` feature for the Gemini API on Vertex AI, enabling developers to access token probability scores and top alternative token probabilities. Provides code examples for enabling and processing logprobs, and demonstrates use cases in classification (ambiguity detection, confidence-based thresholding), dynamic autocomplete, and quantitative RAG evaluation. Explains the mathematical concept of log probabilities and their relation to model confidence.