MiniMax M2.7 vs Ternary Bonsai

MiniMax M2.7 is a 230B-parameter Mixture-of-Experts reasoning model released as open weights in April 2026. Only 10 billion parameters activate per token (8 of 256 experts), which enables frontier-level performance at significantly lower inference cost and latency than dense models of comparable quality. The context window stretches to 204,800 tokens — roughly 307 pages of text — with strong performance on long-horizon agentic tasks. M2.7 is purpose-built for tool-using agents and coding workflows. It scored 50 on the Artificial Analysis Intelligence Index, placing it among the top open-weight models globally. Weights landed on Hugging Face simultaneously with an API launch and the open-sourcing of OpenRoom, MiniMax's interactive agent orchestration system — a rare move that gives developers the full stack from model to agent runtime. MiniMax is a Shanghai-based AI company that has been quietly iterating through M1, M2, M2.5, and now M2.7 with consistent improvements. The M2.7 release represents a notable capability jump in the MoE open-weights space, particularly for developers who need a locally deployable model that can handle complex multi-step agent tasks without calling a paid API.

PrismML's Ternary Bonsai is a family of ultra-compressed language models using 1.58-bit weights — meaning every parameter is stored as -1, 0, or +1, with no higher-precision layers anywhere in the architecture. The line-up covers 8B, 4B, and 1.7B parameter models. The flagship 8B model fits in 1.75 GB of RAM, a 9x reduction versus a 16-bit baseline. Unlike earlier 1-bit experiments that felt like a party trick with serious capability regressions, Ternary Bonsai 8B outperforms PrismML's own prior 1-bit Bonsai 8B by 5 points on average across standard benchmarks. The team also ships WebGPU inference, so the 1.7B model runs entirely in a browser tab. This is the first time a production-quality chat model has run with no server at all. The real-world use case is edge and offline deployment: medical devices, air-gapped government systems, consumer apps that need to work without a signal. At 1.75 GB, the 8B model fits on the GPU RAM of a six-year-old gaming laptop. PrismML is positioning this as the foundation for truly offline AI — a credible claim if the capability benchmarks hold up under real-world testing.