Initial commit: Luminary AI Gateway

OpenAI-compatible AI gateway with Vue admin UI, multi-provider egress,
ingress key governance, monitoring, and security controls.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/pricing/cost.go

@@ -0,0 +1,66 @@
+package pricing
+
+import "strings"
+
+// 价格单位：美元 / 1M tokens
+type ModelPrice struct {
+	InputPer1M  float64
+	OutputPer1M float64
+}
+
+var catalog = map[string]ModelPrice{
+	"gpt-4o":              {InputPer1M: 2.5, OutputPer1M: 10},
+	"gpt-4o-mini":         {InputPer1M: 0.15, OutputPer1M: 0.6},
+	"gpt-4-turbo":         {InputPer1M: 10, OutputPer1M: 30},
+	"gpt-3.5-turbo":       {InputPer1M: 0.5, OutputPer1M: 1.5},
+	"claude-3-5-sonnet":   {InputPer1M: 3, OutputPer1M: 15},
+	"claude-3-5-haiku":    {InputPer1M: 0.8, OutputPer1M: 4},
+	"claude-3-opus":       {InputPer1M: 15, OutputPer1M: 75},
+	"text-embedding-3-small": {InputPer1M: 0.02, OutputPer1M: 0},
+	"text-embedding-3-large": {InputPer1M: 0.13, OutputPer1M: 0},
+	"text-embedding-ada-002": {InputPer1M: 0.1, OutputPer1M: 0},
+	"bge-reranker-v2-m3":    {InputPer1M: 0.1, OutputPer1M: 0},
+	"rerank-english-v3.0":   {InputPer1M: 2.0, OutputPer1M: 0},
+	"rerank-multilingual-v3.0": {InputPer1M: 2.0, OutputPer1M: 0},
+}
+
+func Estimate(model string, tokensIn, tokensOut int, endpoint string) float64 {
+	if strings.Contains(endpoint, "embeddings") || strings.Contains(endpoint, "rerank") {
+		tokensOut = 0
+	}
+	price, ok := lookup(model)
+	if !ok {
+		// fallback: average small model pricing
+		price = ModelPrice{InputPer1M: 0.5, OutputPer1M: 1.5}
+	}
+	inCost := float64(tokensIn) / 1_000_000 * price.InputPer1M
+	outCost := float64(tokensOut) / 1_000_000 * price.OutputPer1M
+	return inCost + outCost
+}
+
+func lookup(model string) (ModelPrice, bool) {
+	if p, ok := catalog[model]; ok {
+		return p, true
+	}
+	// strip provider prefix
+	if i := strings.LastIndex(model, "/"); i >= 0 {
+		if p, ok := catalog[model[i+1:]]; ok {
+			return p, true
+		}
+	}
+	// prefix match
+	for k, v := range catalog {
+		if strings.HasPrefix(model, k) {
+			return v, true
+		}
+	}
+	return ModelPrice{}, false
+}
+
+func ListCatalog() map[string]ModelPrice {
+	out := make(map[string]ModelPrice, len(catalog))
+	for k, v := range catalog {
+		out[k] = v
+	}
+	return out
+}