SID.ai
SID.ai builds purpose-built agentic LLMs for search and reranking — smaller, specialized models trained specifically on the rewrite / retrieve / rerank loop rather than general-purpose tool use.
Product
- SID-1 — first model for agentic retrieval. Exposes an OpenAI-compatible API (
api.sid-1.com/v1). Drop-in over an existing search backend (OpenSearch/Elasticsearch). Marketed as more accurate than agentic retrieval on Gemini 3 Pro, Sonnet 4.5, and GPT-5.1 while being dramatically faster and cheaper. Research page: https://www.sid.ai/research/sid-1
Why It Matters
SID is cited as the first mover in the Purpose-Built Agentic Search Models category — proof that a small specialized model can beat large frontier models on the narrow task of domain search and reranking.
Articles
- Agentic Search Models with OpenSearch and Elasticsearch — Bonsai’s hands-on integration of SID-1
- Agentic search models — Doug Turnbull; names SID as first mover alongside Glean’s Waldo and Charcoal