# Claude (language model)

> Claude is a series of large language models developed by Anthropic. The first model, Claude 1, was released in March 2023, and the latest, Claude Opus 4.5, in November 2025. Training Claude models are generative pre-trained transformers that have been pre-trained to predict the next word in large amounts of text. Then, they have been […]

**Claude** is a series of large language models developed by Anthropic. The first model, Claude 1, was released in March 2023, and the latest, Claude Opus 4.5, in November 2025.

## Training

Claude models are generative pre-trained transformers that have been pre-trained to predict the next word in large amounts of text. Then, they have been fine-tuned, notably using constitutional AI and reinforcement learning from human feedback (RLHF). **ClaudeBot** searches the web for content. It does respect a site’s robots.txt but was criticized by iFixit in 2024, before they added their robots.txt, for placing excessive load on their site by scraping content.

### Constitutional AI

Constitutional AI is an approach developed by Anthropic for training AI systems, particularly language models like Claude, to be harmless and helpful without relying on extensive human feedback. Claude, seen as one of the safest language models, publishes its constitution hoping to inspire adoption of constitutions throughout the industry. Because the constitution is published in human

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*Source: [Wikipedia](https://en.wikipedia.org/wiki/Claude_%28language_model%29)*

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## Metadata

- **URL:** https://wpsearchai.com/claude-language-model/
- **Published:** 2026-01-28T18:48:09+00:00
- **Modified:** 2026-01-28T18:48:09+00:00
- **Author:** admin
- **Categories:** Machine learning