diff --git a/crates/hermesllm/src/bin/provider_models.yaml b/crates/hermesllm/src/bin/provider_models.yaml
index 2e9e0a9b..0a2bcf4c 100644
--- a/crates/hermesllm/src/bin/provider_models.yaml
+++ b/crates/hermesllm/src/bin/provider_models.yaml
@@ -237,6 +237,7 @@ providers:
   - openai/gpt-5.4-nano-2026-03-17
   - openai/gpt-5.4-nano
   - openai/gpt-5.4-mini-2026-03-17
+  - openai/gpt-5.5
   - openai/gpt-3.5-turbo-instruct
   - openai/gpt-3.5-turbo-instruct-0914
   - openai/gpt-3.5-turbo-1106
diff --git a/demos/llm_routing/chatgpt_subscription/README.md b/demos/llm_routing/chatgpt_subscription/README.md
index d091155a..c2b83225 100644
--- a/demos/llm_routing/chatgpt_subscription/README.md
+++ b/demos/llm_routing/chatgpt_subscription/README.md
@@ -48,6 +48,7 @@ bash test_chatgpt.sh
 ## Available models
 
 ```
+chatgpt/gpt-5.5
 chatgpt/gpt-5.4
 chatgpt/gpt-5.3-codex
 chatgpt/gpt-5.2