Release notes · October 24, 2026
Megastructure Arc 2.2.2
Arc 2.2.2 doubles the default output room per step for API agents to 16,384 tokens, lets a cut-off reply grow to 32,768 tokens when the provider lists no maximum, and recognises a reply cut off at the output limit even when OpenRouter reports it as an ordinary tool call.
Current release
Twice the output room per step for API agents, and cut-off replies caught even through OpenRouter
Windows 10/11 (64-bit), or macOS 11+ on Apple Silicon. Bundled Local AI requires macOS 26+. Computer use requires macOS 14+.
System requirements
Windows 10/11 (64-bit), or macOS 11+ on Apple Silicon. Bundled Local AI requires macOS 26+. Computer use requires macOS 14+.