diff --git a/application/use_cases/cost_estimator.py b/application/use_cases/cost_estimator.py
index a60b7dd..32706da 100644
--- a/application/use_cases/cost_estimator.py
+++ b/application/use_cases/cost_estimator.py
@@ -24,7 +24,7 @@ class CostEstimate:
     "ollama/llama3.2:3b": 0.0,
     "ollama/phi4:14b": 0.0,
     # Low tier
-    "claude-haiku-4-5-20251001": 0.25,
+    "claude-haiku-4-5-20251001": 1.00,
     "gemini/gemini-3-flash-preview": 0.10,
     # Medium tier
     "claude-sonnet-4-6": 3.00,
diff --git a/domain/services/engine_cost_calculator.py b/domain/services/engine_cost_calculator.py
index 8db1de1..f93cebd 100644
--- a/domain/services/engine_cost_calculator.py
+++ b/domain/services/engine_cost_calculator.py
@@ -10,12 +10,12 @@
 from dataclasses import dataclass
 
 # Pricing per 1 million tokens (input, output).
-# Updated 2026-03 — verify periodically against provider pricing pages.
+# Updated 2026-05-19 — verify periodically against provider pricing pages.
 _MODEL_PRICING: dict[str, tuple[float, float]] = {
     # Anthropic
     "claude-sonnet-4-6": (3.00, 15.00),
     "claude-opus-4-6": (15.00, 75.00),
-    "claude-haiku-4-5-20251001": (0.25, 1.25),
+    "claude-haiku-4-5-20251001": (1.00, 5.00),
     # OpenAI
     "o4-mini": (1.10, 4.40),
     "gpt-4o": (2.50, 10.00),