# Anthropic

Announced · [AI agents](https://builder.registrai.cc/ecosystem/ai-agents/) · Last reviewed 2026-10-20

AI developer behind the Claude models and Claude Agent SDK. Circle's 2025-10-28 testnet announcement lists AI-powered developer tools for Arc built on the Claude Agent SDK.

[Website](https://www.anthropic.com) · [X @AnthropicAI](https://x.com/AnthropicAI)

## Status

- First announced 2025-10-28

Evidence: [Circle Arc public testnet announcement](https://www.arc.io/pressroom/circle-launches-arc-public-testnet)

## Sources

1. [Circle launches Arc public testnet (2025-10-28)](https://www.arc.io/pressroom/circle-launches-arc-public-testnet) (2026-10-20)
2. [Anthropic website](https://www.anthropic.com) (2026-10-20)

[Suggest a correction](https://builder.registrai.cc/ecosystem/anthropic/correct/) · [How we publish](https://builder.registrai.cc/how-we-publish/) · [Arc ecosystem](https://builder.registrai.cc/ecosystem/)

Source: https://builder.registrai.cc/ecosystem/anthropic/ · Registrai, builder.registrai.cc, CC BY 4.0