chore: Update Tinker prices

Author: vivekkalyan

src/art/costs.py

@@ -21,6 +21,10 @@ class ModelPricing:
 # Pricing per model ($/1M tokens). Keep in sync with infra pricing.
 MODEL_PRICING: dict[str, ModelPricing] = {
     # Qwen models
+    "Qwen/Qwen3.5-4B": ModelPricing(prefill=0.22, sample=0.67, train=0.67),
+    "Qwen/Qwen3.5-27B": ModelPricing(prefill=1.24, sample=3.73, train=3.73),
+    "Qwen/Qwen3.5-35B-A3B": ModelPricing(prefill=0.36, sample=0.89, train=1.07),
+    "Qwen/Qwen3.5-397B-A17B": ModelPricing(prefill=2.00, sample=5.00, train=6.00),
     "Qwen/Qwen3-4B-Instruct-2507": ModelPricing(prefill=0.07, sample=0.22, train=0.22),
     "Qwen/Qwen3-8B": ModelPricing(prefill=0.13, sample=0.40, train=0.40),
     "Qwen/Qwen3-8B-Base": ModelPricing(prefill=0.13, sample=0.40, train=0.40),
@@ -60,6 +64,7 @@ class ModelPricing:
     "openai/gpt-oss-20b": ModelPricing(prefill=0.12, sample=0.30, train=0.36),
     # Moonshot models
     "moonshotai/Kimi-K2-Thinking": ModelPricing(prefill=0.98, sample=2.44, train=2.93),
+    "moonshotai/Kimi-K2.5": ModelPricing(prefill=1.47, sample=3.66, train=4.40),
 }