modify docs and example

Author: par4m

docs/docs/ai/llm.mdx

@@ -97,4 +97,27 @@ cocoindex.LlmSpec(
 </TabItem>
 </Tabs>
 
-You can find the full list of models supported by Gemini [here](https://ai.google.dev/gemini-api/docs/models).
+You can find the full list of models supported by Gemini [here](https://ai.google.dev/gemini-api/docs/models).
+
+### Anthropic
+
+To use the Anthropic LLM API, you need to set the environment variable `ANTHROPIC_API_KEY`.
+You can generate the API key from [Anthropic API](https://console.anthropic.com/settings/keys).
+
+A spec for Anthropic looks like this:
+
+<Tabs>
+<TabItem value="python" label="Python" default>
+
+```python
+cocoindex.LlmSpec(
+    api_type=cocoindex.LlmApiType.ANTHROPIC,
+    model="claude-3-5-sonnet-latest",
+)
+```
+
+</TabItem>
+</Tabs>
+
+You can find the full list of models supported by Anthropic [here](https://docs.anthropic.com/en/docs/about-claude/models/all-models).
+

examples/manuals_llm_extraction/main.py

@@ -98,6 +98,10 @@ def manual_extraction_flow(flow_builder: cocoindex.FlowBuilder, data_scope: coco
                 # Replace by this spec below, to use Gemini API model
                 #   llm_spec=cocoindex.LlmSpec(
                 #       api_type=cocoindex.LlmApiType.GEMINI, model="gemini-2.0-flash"),
+
+                # Replace by this spec below, to use Anthropic API model
+                #   llm_spec=cocoindex.LlmSpec(
+                #       api_type=cocoindex.LlmApiType.ANTHROPIC, model="claude-3-5-sonnet-latest"),
                 output_type=ModuleInfo,
                 instruction="Please extract Python module information from the manual."))
         doc["module_summary"] = doc["module_info"].transform(summarize_module)