diff --git a/packages/ai/scripts/generate-models.ts b/packages/ai/scripts/generate-models.ts
index 3599bce6c..9163028c4 100644
--- a/packages/ai/scripts/generate-models.ts
+++ b/packages/ai/scripts/generate-models.ts
@@ -2433,12 +2433,15 @@ async function loadModelsDevData(): Promise<Model<any>[]> {
 					baseUrl,
 					reasoning: isKimiK3 || m.reasoning === true,
 					input: m.modalities?.input?.includes("image") ? ["text", "image"] : ["text"],
-					cost: {
-						input: m.cost?.input || (isKimiK3 ? KIMI_K3_COST.input : 0),
-						output: m.cost?.output || (isKimiK3 ? KIMI_K3_COST.output : 0),
-						cacheRead: m.cost?.cache_read || (isKimiK3 ? KIMI_K3_COST.cacheRead : 0),
-						cacheWrite: m.cost?.cache_write || (isKimiK3 ? KIMI_K3_COST.cacheWrite : 0),
-					},
+					// Moonshot does not bill cache writes; models.dev lists the input rate as cache_write for Kimi K3.
+					cost: isKimiK3
+						? { ...KIMI_K3_COST }
+						: {
+								input: m.cost?.input || 0,
+								output: m.cost?.output || 0,
+								cacheRead: m.cost?.cache_read || 0,
+								cacheWrite: m.cost?.cache_write || 0,
+							},
 					contextWindow: m.limit?.context || 4096,
 					maxTokens: m.limit?.output || 4096,
 					compat,
diff --git a/packages/ai/test/anthropic-adaptive-thinking-models.test.ts b/packages/ai/test/anthropic-adaptive-thinking-models.test.ts
index 1b1be72dc..9efa7de35 100644
--- a/packages/ai/test/anthropic-adaptive-thinking-models.test.ts
+++ b/packages/ai/test/anthropic-adaptive-thinking-models.test.ts
@@ -4,6 +4,7 @@ import type { Api, Model } from "../src/types.ts";
 
 const EXPECTED_CURRENT_ADAPTIVE_THINKING_MODELS = [
 	"anthropic/claude-fable-5",
+	"anthropic/claude-haiku-5-5",
 	"anthropic/claude-opus-4-8",
 	"anthropic/claude-opus-5",
 	"anthropic/claude-sonnet-5",
@@ -40,7 +41,9 @@ describe("Anthropic adaptive thinking model metadata", () => {
 					// Regression for #9323: Fireworks uses catalog effort metadata and
 					// verified fallbacks, not a fixed set of adaptive model names.
 					modelId.startsWith("fireworks/") ||
-					/(opus[-.](4[-.][678]|5)|sonnet[-.]4[-.]6|sonnet[-.]5|fable[-.]5|kimi-coding\/)/.test(modelId),
+					/(opus[-.](4[-.][678]|5)|sonnet[-.]4[-.]6|sonnet[-.]5|haiku[-.]5[-.]5|fable[-.]5|kimi-coding\/)/.test(
+						modelId,
+					),
 			),
 		);
 	});