Kimi K2.7-Code: Open-Weight 1T Model That Beats Claude Opus on Tool Use (opens in new tab)

81.1% on MCPMark Verified — that's Kimi K2.7-Code's tool-use score, which clears Claude Opus 4.8's 76.4% on the same benchmark. The model is open-weight, costs $0.95 per million input tokens at Moonshot's API, and dropped on June 12, 2026 under a modified MIT license. If you're running agentic pipelines that make heavy use of MCP tools, the arithmetic on switching is straightforward. Here's what you actually need to know about this release. Architecture: What Makes a 1T MoE Model Different K2...