feat(models): add live display pricing for known Command Code models

The Provider API does not expose pricing yet. Overlay a static MODEL_COSTS
map on top of the dynamically fetched model list so pi can display per-model
costs. Models not in the table fall back to zero cost. When the Provider API
adds a cost field, the static table can be removed.

index.ts

@@ -22,6 +22,49 @@ import { getApiKey, login, refreshToken } from "./src/oauth.ts"
 const API_BASE = process.env.COMMANDCODE_API_BASE ?? DEFAULT_API_BASE
 const MODELS_URL = process.env.COMMANDCODE_MODELS_URL ?? DEFAULT_MODELS_URL
 
+type CommandCodeModelCost = {
+  input: number
+  output: number
+  cacheRead: number
+  cacheWrite: number
+}
+
+const ZERO_MODEL_COST: CommandCodeModelCost = {
+  input: 0,
+  output: 0,
+  cacheRead: 0,
+  cacheWrite: 0,
+}
+
+// The Provider API supplies the current model list. Keep known display pricing
+// here until the Provider API exposes prices directly.
+const MODEL_COSTS: Record<string, CommandCodeModelCost> = {
+  "claude-opus-4-7": { input: 5, output: 25, cacheRead: 0.5, cacheWrite: 6.25 },
+  "claude-opus-4-6": { input: 5, output: 25, cacheRead: 0.5, cacheWrite: 6.25 },
+  "claude-sonnet-4-6": { input: 3, output: 15, cacheRead: 0.3, cacheWrite: 3.75 },
+  "claude-haiku-4-5-20251001": { input: 1, output: 5, cacheRead: 0.1, cacheWrite: 1.25 },
+  "gpt-5.5": { input: 5, output: 30, cacheRead: 0.5, cacheWrite: 0 },
+  "gpt-5.4": { input: 2.5, output: 15, cacheRead: 0.25, cacheWrite: 0 },
+  "gpt-5.3-codex": { input: 2, output: 8, cacheRead: 0.5, cacheWrite: 0 },
+  "gpt-5.4-mini": { input: 0.75, output: 4.5, cacheRead: 0.075, cacheWrite: 0 },
+  "google/gemini-3.5-flash": { input: 1.5, output: 9, cacheRead: 0.15, cacheWrite: 0 },
+  "google/gemini-3.1-flash-lite": { input: 0.25, output: 1.5, cacheRead: 0.03, cacheWrite: 0 },
+  // 4× usage deal: 75% off through May 31, 2026
+  "deepseek/deepseek-v4-pro": { input: 0.435, output: 0.87, cacheRead: 0.003625, cacheWrite: 0 },
+  "deepseek/deepseek-v4-flash": { input: 0.14, output: 0.28, cacheRead: 0.01, cacheWrite: 0 },
+  "moonshotai/Kimi-K2.6": { input: 0.95, output: 4, cacheRead: 0.16, cacheWrite: 0 },
+  "moonshotai/Kimi-K2.5": { input: 0.6, output: 3, cacheRead: 0.1, cacheWrite: 0 },
+  "zai-org/GLM-5.1": { input: 1.4, output: 4.4, cacheRead: 0.26, cacheWrite: 0 },
+  "zai-org/GLM-5": { input: 1, output: 3.2, cacheRead: 0.2, cacheWrite: 0 },
+  "MiniMaxAI/MiniMax-M2.7": { input: 0.3, output: 1.2, cacheRead: 0.06, cacheWrite: 0 },
+  "MiniMaxAI/MiniMax-M2.5": { input: 0.27, output: 0.95, cacheRead: 0.03, cacheWrite: 0 },
+  "Qwen/Qwen3.6-Max-Preview": { input: 1.3, output: 7.8, cacheRead: 0.26, cacheWrite: 1.63 },
+  "Qwen/Qwen3.6-Plus": { input: 0.5, output: 3, cacheRead: 0.1, cacheWrite: 0 },
+  // 2× usage deal: 50% off through June 22, 2026
+  "Qwen/Qwen3.7-Max": { input: 1.25, output: 3.75, cacheRead: 0.25, cacheWrite: 1.56 },
+  "stepfun/Step-3.5-Flash": { input: 0.1, output: 0.3, cacheRead: 0.02, cacheWrite: 0 },
+}
+
 const streamCommandCode = createStreamCommandCode({
   createStream: createAssistantMessageEventStream,
   calculateCost,
@@ -57,7 +100,7 @@ export default async function (pi: ExtensionAPI) {
       name: model.name,
       reasoning: model.reasoning,
       input: ["text"] as const,
-      cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
+      cost: MODEL_COSTS[model.id] ?? ZERO_MODEL_COST,
       contextWindow: model.contextWindow,
       maxTokens: model.maxTokens,
     })),