CREATE TABLE IF NOT EXISTS ai_model_pricing (
    id BIGSERIAL PRIMARY KEY,
    model_version_id UUID NOT NULL,
    input_price_per_1k_tokens VARCHAR(255) NOT NULL,
    output_price_per_1k_tokens VARCHAR(255) NOT NULL,
    currency VARCHAR(255) NOT NULL,
    effective_from TIMESTAMPTZ NOT NULL
);

CREATE INDEX idx_ai_model_pricing_model_version_id ON ai_model_pricing (model_version_id);