subquadratic
Models published by subquadratic, available through the AnyRouter API. Each can route across multiple upstream providers for availability and price.
SubQ Preview is Subquadratic's long-context chat model, built on its Subquadratic Sparse Attention (SSA) architecture for reasoning over very large inputs such as whole repositories, contract archives and filings. It is in early access: model availability and features may change. Text in, text out, with file (document) input, function calling, JSON-schema structured outputs and a reasoning_effort control (none to max). SubQ serves it on Chat Completions and the Responses API. Reasoning text is never returned; reasoning tokens bill as output.
SubQ Snap Preview is Subquadratic's System One decision model for routing, guardrails, triage and other fast decisions. It is in public preview. Send application state and typed questions (noul / choice / score) and get back typed answers with probabilities and confidence — not generated chat text. SubQ documents text input and output plus image input (PNG, JPEG or WebP, up to 4 images). Call POST /api/v1/decisions (POST /api/v1/systemone is the same handler).