Task-based recommendation

Best LLM for JSON & Structured Output

Compare models for structured JSON extraction, schema adherence, and function calling reliability. Based on BFCL and structured output benchmarks.

Last updated: May 2025 · Methodology

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Sample Data Notice

All benchmark scores, pricing data, and rankings on this page are mock placeholders for development and preview purposes. They do not reflect real-world model performance. Real data sources will be connected as the product matures.

Our Pick

GPT-4.1 — Best for JSON & Structured Output

GPT-4.1 with structured outputs mode is the most reliable model for JSON extraction and schema adherence. Claude Sonnet 4.6 is a close second with better pricing.

Compare structured output models →

MVP placeholder. Detailed benchmark results coming soon. See full leaderboard.