diff --git a/README.md b/README.md
index 7f3a907..f01e4c9 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
-# evals
+# Instructor Evaluations
 
-Using various instructor clients evaluating the quality and capabilities of extractions and reasoning.
+We use various instructor clients to evaluate the quality and capabilities of extractions and reasoning.
 
 We'll run these tests and see what ends up failing often.
 
@@ -9,6 +9,77 @@ pip install -r requirements.txt
 pytest 
 ```
 
+## Adding a New Test
+
+To contribute a new test similar to `test_classification_literals.py`, follow these steps:
+
+1. **Create a New Test File**:
+   - Create a new test file in the `tests` directory. For example, `tests/test_new_feature.py`.
+
+2. **Import Necessary Modules**:
+   - Import the required modules at the beginning of your test file. You will typically need `pytest`, `product` from `itertools`, `Literal` from `typing`, and `clients` from `util`.
+
+   ```python
+   from itertools import product
+   from typing import Literal
+   from util import clients
+   from pydantic import BaseModel
+   import pytest
+   ```
+
+3. **Define Your Data Model**:
+   - Define a Pydantic data model for the expected response. For example, if you are testing a sentiment analysis feature, you might define:
+
+   ```python
+   class SentimentAnalysis(BaseModel):
+       label: Literal["positive", "negative", "neutral"]
+   ```
+
+4. **Prepare Your Test Data**:
+   - Prepare a list of tuples containing the input data and the expected output. For example:
+
+   ```python
+   data = [
+       ("I love this product!", "positive"),
+       ("This is the worst experience ever.", "negative"),
+       ("It's okay, not great but not bad either.", "neutral"),
+   ]
+   ```
+
+5. **Write the Test Function**:
+   - Write an asynchronous test function using `pytest.mark.asyncio_cooperative` and `pytest.mark.parametrize` to iterate over the clients and data. For example:
+
+   ```python
+   @pytest.mark.asyncio_cooperative
+   @pytest.mark.parametrize("client, data", product(clients, data))
+   async def test_sentiment_analysis(client, data):
+       input, expected = data
+       prediction = await client.create(
+           response_model=SentimentAnalysis,
+           messages=[
+               {
+                   "role": "system",
+                   "content": "Analyze the sentiment of this text as 'positive', 'negative', or 'neutral'.",
+               },
+               {
+                   "role": "user",
+                   "content": input,
+               },
+           ],
+       )
+       assert prediction.label == expected
+   ```
+
+6. **Run Your Tests**:
+   - Run your tests using `pytest` to ensure everything works as expected.
+
+   ```sh
+   pytest
+   ```
+
+By following these steps, you can easily add new tests to evaluate different features using various instructor clients. Make sure to keep your tests asynchronous and handle any specific requirements for the feature you are testing.
+
+
 ## Contributions
 
 When contributing just make sure everything is as async and we'll handle the rest!
diff --git a/tests/util.py b/tests/util.py
index bafb49d..d769d20 100644
--- a/tests/util.py
+++ b/tests/util.py
@@ -40,7 +40,7 @@ class Models(str, Enum):
     ),
     instructor.from_anthropic(
         AsyncAnthropic(api_key=os.environ.get("ANTHROPIC_API_KEY")),
-        model=Models.CLAUDE3_SONNET,
+        model=Models.CLAUDE35_SONNET,
         max_tokens=4000,
     ),
     instructor.from_anthropic(