Update Zen4 Thinking model card — API-only

README.md

@@ -4,6 +4,8 @@ pipeline_tag: text-generation
 tags:
   - text-generation
   - reasoning
+  - thinking
+  - math
   - zen
   - zen4
   - hanzo
@@ -12,24 +14,30 @@ license: apache-2.0
 
 # Zen4 Thinking
 
-**Zen LM by Hanzo AI** — Reasoning-optimized model with explicit thinking traces. For problems requiring step-by-step analysis.
+**Zen LM by Hanzo AI** — Chain-of-thought reasoning model with explicit thinking traces. Excels at math, logic, and step-by-step analysis.
 
 ## Specs
 
 | Property | Value |
 |----------|-------|
-| Parameters | 744B MoE |
-| Context | 262K |
+| Parameters | 562B MoE |
+| Context Length | 262K tokens |
 | Architecture | Zen MoDE (Mixture of Distilled Experts) |
 | Generation | Zen4 |
 
 ## API Access
 
-```bash
-curl https://api.hanzo.ai/v1/chat/completions \
-  -H "Authorization: Bearer $HANZO_API_KEY" \
-  -H "Content-Type: application/json" \
-  -d '{"model": "zen4-thinking", "messages": [{"role": "user", "content": "Hello"}]}'
+This model is served exclusively via the Hanzo AI API. Weight downloads are not available for this model tier.
+
+```python
+from openai import OpenAI
+
+client = OpenAI(base_url="https://api.hanzo.ai/v1", api_key="YOUR_KEY")
+response = client.chat.completions.create(
+    model="zen4-thinking",
+    messages=[{"role": "user", "content": "Hello"}],
+)
+print(response.choices[0].message.content)
 ```
 
 Get your API key at [console.hanzo.ai](https://console.hanzo.ai) — $5 free credit on signup.