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Prime Intellect says a swarm of 2,000+ agents rewrote its open-source Prime Agent in Rust

Announced Oct 9, the Rust rewrite took two weeks across 10,000+ Prime Sandboxes and 200B+ tokens, and adds native Windows support (beta) and Homebrew install. The faster-startup and lower-memory numbers come from Prime Intellect's own inference-free benchmark, and the 2,000-agent figure hasn't been independently verified.

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Microsoft releases FrogNano-4B, an open-weight 4B coding agent trained only with RL

Built on Qwen3.5 4B under Apache 2.0 and trained with reinforcement learning on about 1,500 synthetic repo tasks (no stronger model trajectories), FrogNano scores 61.5% on SWE bench Verified and 37.6% on SWE bench Pro in Microsoft's own five tool Leaf harness at 131K context. Microsoft calls it a research artifact: Python heavy, BF16 weights need about 9.3GB, and quantized builds aren't validated yet…

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