> For a complete page index of the Captain API documentation, fetch https://docs.captain.dev/llms.txt?excludeSpec=true

# Keyword and Semantic Balance

* **Tune the keyword/semantic balance**: `semantic_ratio` on v2 and v3 Query (`0.0` to `1.0`, default `0.5`) weights the fused result set: `0.0` is keyword only, `1.0` is semantic only. See [Advanced Search & Relations](/guides/advanced-querying).

Same day: [MCP Guide](/changelog/2026-08-24-mcp-guide), [Metadata Boosts](/changelog/2026-08-24-metadata-boosts), [Mint Asset URLs](/changelog/2026-08-24-mint-asset-urls), [Supported File Types Guide](/changelog/2026-08-24-supported-file-types-guide), [YouTube Audio & Video Modes](/changelog/2026-08-24-youtube-audio-and-video-modes)