Anthropic

Ecosystem / Investors

Anthropic got major investment from Amazon and thus Amazon Bedrock is well equiped to host Anthropic models.

Model series

• 2025-05: anthropic-claude-4-release-note

• 2025-03: Claude 3.7 Sonnet

• 2024-11: Claude 3.5 Sonnet / Claude 3.5 Haiku

• 2024-03: Claude 3 Sonnet and Haiku

Model Context Protocol (MCP)

• 2025-11-25: MCP Specification 2025-11-25 released (first anniversary) with Tasks abstraction, improved OAuth, and enhanced security
  • TypeScript SDK v1.25.1 (Dec 2024) - implements 2025-11-25 spec with fetch transport support
  • Python SDK v1.25.0 (Dec 2024) - implements 2025-11-25 spec, v2 development on main branch
• 2025-06-18: MCP Specification update with structured tool outputs, OAuth authorization, and elicitation features
• 2025-03: new version with better support for remote MCP servers, some SDKs deprecated
• 2024-11: Anthoropic introduced MCP to allow for reuse of functions/api’s in a distributed environment. Previously each agent had to include the source in the code, now just a list of tools is passed and the definition of how to call the tool is generated dynamically at run-time.
  To use MCP and MCP Client application is needed such as the Claude Desktop application.
  See pulsemcp.com for a long list of MCP capable clients.

Claude Code & Agent SDK

• 2025-12: Claude Code 2.0 major updates - background agents, named sessions, Chrome integration
• 2025-09: Claude Code 2.0 released with Claude Sonnet 4.5 - featuring checkpoints, subagents, hooks, 77.2% SWE-bench score
• 2025-09: Claude Agent SDK released (v0.1.x) - TypeScript V2 interface preview with simplified session-based API (late 2025)
• 2025-02: Claude Code first public release - Terminal and IDE-based AI coding assistant with native MCP support, 200K token context windows, autonomous 30+ hour operation
• 2024-11: Internal dogfooding version
• 2024-09: First prototype created