Add GLM-5.3 Flash to model list + 'which models' open question

README.md

@@ -41,10 +41,11 @@ The cooperative's software is open source and lives in the [`code`](https://git.
 
 ### Models
 
-The gateway currently exposes two models:
+The gateway currently exposes three models (all served through Tinfoil's TEE-protected enclaves):
 
-- **DeepSeek V4 Flash** — default model, best for agentic tasks
+- **DeepSeek V4 Flash** — default model, best for agentic tasks (1M context, tool calling)
 - **GPT-OSS 120B** — lightweight fallback
+- **GLM-5.3 Flash** — fast, efficient MoE model
 
 ### Features