fix(models): refresh DeepSeek V4 pricing

tests/fixtures/commandcode-pricing.json

@@ -1,5 +1,5 @@
 {
-  "verifiedAt": "2026-08-18",
+  "verifiedAt": "2026-08-20",
   "source": "https://commandcode.ai/docs/resources/pricing-limits",
   "tierPolicy": "Use request-wide input tiers; the highest threshold exceeded by input plus cache tokens applies to the full request.",
   "tiers": {
@@ -25,8 +25,8 @@
     "MiniMaxAI/MiniMax-M3": [0.3, 1.2, 0.06, 0],
     "MiniMaxAI/MiniMax-M2.7": [0.3, 1.2, 0.06, 0],
     "MiniMaxAI/MiniMax-M2.5": [0.3, 1.2, 0.03, 0],
-    "deepseek/deepseek-v4-pro": [0.435, 0.87, 0.003625, 0],
-    "deepseek/deepseek-v4-flash": [0.14, 0.28, 0.0028, 0],
+    "deepseek/deepseek-v4-pro": [0.66, 1.98, 0.022, 0],
+    "deepseek/deepseek-v4-flash": [0.22, 0.66, 0.007, 0],
     "Qwen/Qwen3.8-Max": [2, 6, 0.25, 2.5],
     "Qwen/Qwen3.7-Max": [2.5, 7.5, 0.5, 3.13],
     "Qwen/Qwen3.7-Plus": [0.4, 1.6, 0.08, 0.5],

tests/test-pricing.ts

@@ -108,10 +108,16 @@ describe("MODEL_COSTS pricing overlay", () => {
   })
 
   it("matches corrected official rates", () => {
+    assertCost("deepseek/deepseek-v4-pro", {
+      input: 0.66,
+      output: 1.98,
+      cacheRead: 0.022,
+      cacheWrite: 0,
+    })
     assertCost("deepseek/deepseek-v4-flash", {
-      input: 0.14,
-      output: 0.28,
-      cacheRead: 0.0028,
+      input: 0.22,
+      output: 0.66,
+      cacheRead: 0.007,
       cacheWrite: 0,
     })
     assertCost("Qwen/Qwen3.7-Max", {
@@ -163,7 +169,7 @@ describe("MODEL_COSTS pricing overlay", () => {
 
   it("tracks pricing provenance", () => {
     assert.equal(PRICING_SOURCE_URL, "https://commandcode.ai/docs/resources/pricing-limits")
-    assert.equal(PRICING_LAST_VERIFIED, "2026-08-18")
+    assert.equal(PRICING_LAST_VERIFIED, "2026-08-20")
   })
 
   it("fails once temporary pricing needs review", () => {