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OSS2026-09-01 · source-backed
The Apache-2.0 microVM sandbox for AI agents built on RustVMM and KVM added cross-node pause/resume and control-plane separation on August 28, claiming average cold start under 60ms, sub-150ms delivery under high concurrency, and under 5MB memory overhead per sandbox, with pause and resume at hundred-millisecond granularity (GitHub). 11.6k stars since the April v0.1.0. A credible open alternative under the hosted agent-sandbox services, which is a category that has been quietly expensive.
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Released August 28 with 78 layers, 77 of them MoE with 256 routed plus one shared expert and top-8 routing, plus a native 10B MTP layer for speculative decoding (GitHub). The attention stack uses Gated DeepSeek Sparse Attention with IndexCache for cross-layer sparse index reus...
Hy4 preview, released August 28: 770B total parameters, 49B active, over 1M token context, open-sourced and simultaneously on Tencent Cloud TokenHub and OpenRouter at $0.834 per million input tokens, $2.501 per million output, $0.042 per million cached. In Tencent's own evalua...
78 layers where layer one is dense FFN and the other 77 are MoE, each with 256 routed experts and 1 shared expert, top-8 routing per token, plus a native 10B MTP layer (0.7B activated) built in for speculative decoding. FP8 and base variants released together on August 28; the...
On July 14, llama.cpp merged native support for Tencent's Hunyuan Hy3 architecture (PR #25395), a 295B-parameter, 21B-active MoE. Any recent master build can load it now. Community GGUF quants (Q2_K, IQ2_M, Q4_K_M) from AngelSlim and others already ship on Hugging Face, and so...
Firecracker + CoW mmap forking spawns KVM-isolated sandboxes in 0.79ms p50 with 265KB memory per instance — versus E2B's ~150ms and ~128MB. At this scale, sandboxed code execution becomes viable inside interactive agent loops where latency directly impacts UX. GitHub ---
Simon Willison ran it and notes the jump from Hy3's 295B/21B/256K, two reasoning effort levels with 'high' as default and 'no_think' available, and a reasoning trace written in slightly truncated English that reads as the model deliberating, considering and rejecting details l...
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