docs: add Novita AI in README

README.org

@@ -26,6 +26,7 @@ gptel is a simple Large Language Model chat client for Emacs, with support for m
 | DeepSeek           | ✓        | [[https://platform.deepseek.com/api_keys][API key]]                    |
 | Cerebras           | ✓        | [[https://cloud.cerebras.ai/][API key]]                    |
 | Github Models      | ✓        | [[https://github.com/settings/tokens][Token]]                      |
+| Novita AI          | ✓        | [[https://novita.ai/model-api/product/llm-api?utm_source=github_gptel&utm_medium=github_readme&utm_campaign=link][Token]]                      |
 #+html: </div>
 
 *General usage*: ([[https://www.youtube.com/watch?v=bsRnh_brggM][YouTube Demo]])
@@ -79,6 +80,7 @@ gptel uses Curl if available, but falls back to url-retrieve to work without ext
       - [[#deepseek][DeepSeek]]
       - [[#cerebras][Cerebras]]
       - [[#github-models][Github Models]]
+      - [[#novita-ai][Novita AI]]
   - [[#usage][Usage]]
     - [[#in-any-buffer][In any buffer:]]
     - [[#in-a-dedicated-chat-buffer][In a dedicated chat buffer:]]
@@ -725,6 +727,46 @@ The above code makes the backend available to select.  If you want it to be the
           :models '(gpt-4o))
 #+end_src
 
+#+html: </details>
+#+html: <details><summary>
+**** Novita AI
+#+html: </summary>
+
+Register a backend with
+#+begin_src emacs-lisp
+;; Novita AI offers an OpenAI compatible API
+(gptel-make-openai "NovitaAI"         ;Any name you want
+  :host "api.novita.ai"
+  :endpoint "/v3/openai"
+  :key "your-api-key"                   ;can be a function that returns the key
+  :stream t
+  :models '(;; has many more, check https://novita.ai/llm-api
+            gryphe/mythomax-l2-13b
+            meta-llama/llama-3-70b-instruct
+            meta-llama/llama-3.1-70b-instruct))
+#+end_src
+
+You can pick this backend from the menu when using gptel (see [[#usage][Usage]])
+
+***** (Optional) Set as the default gptel backend
+
+The above code makes the backend available to select.  If you want it to be the default backend for gptel, you can set this as the value of =gptel-backend=.  Use this instead of the above.
+#+begin_src emacs-lisp
+;; OPTIONAL configuration
+(setq
+ gptel-model   'gryphe/mythomax-l2-13b
+ gptel-backend
+ (gptel-make-openai "NovitaAI"         
+   :host "api.novita.ai"
+   :endpoint "/v3/openai"
+   :key "your-api-key"                   
+   :stream t
+   :models '(;; has many more, check https://novita.ai/llm-api
+             mistralai/Mixtral-8x7B-Instruct-v0.1
+             meta-llama/llama-3-70b-instruct
+             meta-llama/llama-3.1-70b-instruct)))
+#+end_src
+
 #+html: </details>
 
 ** Usage