GET /v1/models — list available model slugs and capabilities.
text, image, audio, video, music, embedding, rerank.
GET /v1/models/{slug} returns extended info including:
supportsChat / supportsStreaming / supportsVision / supportsPdf / supportsTools / supportsJsonModemaxContextTokens / maxOutputTokensallowedParams.supported_inputs (MIME whitelist)allowedParams.max_image_size_bytes, max_pdf_size_bytes, etc.