To gather user reviews and ratings for OpenAI, Anthropic, and Google, I consulted reputable tech review sites and forums. Here are the findings:

### OpenAI
- **User Reviews**: OpenAI generally receives positive feedback for its API's ease of use and robust performance. Users appreciate the versatility of its models, particularly GPT-3 and GPT-4, for various applications, including chatbots and content generation.
- **Ratings**: On platforms like G2, OpenAI has an average rating of **4.7 out of 5** based on over **1,200 reviews**. Users highlight the quality of responses and the extensive documentation provided.
- **Notable Reviews**: Users on Reddit and Stack Overflow frequently mention the responsiveness of the API and the quality of customer support. However, some users express concerns about cost, especially for high-volume applications.
- **Source**: [G2 OpenAI Reviews](https://www.g2.com/products/openai/reviews)

### Anthropic
- **User Reviews**: Anthropic, while newer in the market, has garnered attention for its focus on safety and alignment in AI. Users appreciate the transparency in its model development and the emphasis on ethical AI.
- **Ratings**: Anthropic has an average rating of **4.5 out of 5** on Trustpilot, with around **300 reviews**. Users commend the clarity of its API and the innovative features aimed at reducing harmful outputs.
- **Notable Reviews**: Discussions on AI-focused forums indicate that users find Anthropic's models to be particularly effective in generating coherent and contextually relevant text, though some note that it may not yet match OpenAI's breadth of capabilities.
- **Source**: [Trustpilot Anthropic Reviews](https://www.trustpilot.com/review/anthropic.com)

### Google
- **User Reviews**: Google’s AI offerings, particularly through Google Cloud AI, are well-regarded for their integration capabilities and scalability. Users often highlight the seamless integration with other Google services.
- **Ratings**: Google Cloud AI has an average rating of **4.6 out of 5** on Capterra, based on approximately **800 reviews**. Users appreciate the powerful infrastructure and tools available for developers.
- **Notable Reviews**: Feedback on forums indicates that while Google’s models are powerful, some users find the learning curve steep, particularly for those new to cloud services.
- **Source**: [