diff --git a/config.yaml b/config.yaml
index 2bb405a..d1f04c6 100644
--- a/config.yaml
+++ b/config.yaml
@@ -85,6 +85,17 @@ model_list:
       output_cost_per_token: 0.00000044
       cache_read_input_token_cost: 0.000000022
 
+  # GLM-5.3 (full flagship) on GreenPT — strongest agentic model in the green
+  # tier. $1.10 in / $4.40 out per 1M, 1M context.
+  - model_name: greenpt/glm-5.3
+    litellm_params:
+      model: openai/glm-5.3
+      api_base: https://api.greenpt.ai/v1
+      api_key: os.environ/GREENPT_API_KEY
+    model_info:
+      input_cost_per_token: 0.0000011
+      output_cost_per_token: 0.0000044
+
   # --- PublicAI (publicly developed / sovereign models) ---
   # OpenAI-compatible gateway for public open models. Apertus is the Swiss AI
   # Initiative's fully-open model (Apache-2.0: weights, code, and training data).