Add Claude 2 AI Model

Based on the cheapest option available, Claude 2 API is approximately 61.25% cheaper than GPT-4. It has a context window of 100k – far higher than GPT-4’s 32k. The new model’s strengths lie in its ability to take in and understand very large amounts of text, up to 75,000 words – for example, it is able to summarize novels. It has also been praised for its superior performance with maths and coding.