open-weight models

Nous Research released Arete-27B, a Qwen3.8-27B fine-tune. Its card reports propaganda in 0.9% of answers versus 22% for the base model on Nous's own 803-prompt eval, graded by Grok 4.7; Nous's pages give differing dataset sizes.

Thinking Machines Lab released Inkling 2 Small on November 5 through Tinker with closed weights, saying it intends to release Apache 2.0 weights after external safety testing; Artificial Analysis scores it 31 on its Intelligence Index.

NVIDIA says its open-weight Nemotron 3.5 Transcribe handles transcription, speaker labels, translation and audio Q&A in one checkpoint, with benchmark results that are NVIDIA's own and a model built for recorded audio.

Anthropic reports Z.ai's open-weight GLM-5.3 developed end-to-end exploits in 50 of 410 ExploitBench attempts versus 56 for Claude Mythos Preview; NIST's CAISI calls it the most cyber-capable open-weight model.

Qwen-Image-2.1 unifies text-to-image generation and editing with native RGBA transparency, tops open-weight rivals on Qwen's own benchmark, but trails closed leaders.

Tencent's newly open-sourced Hy4 preview model jumped to 8th place on the Code Arena WebDev leaderboard, up from 34th for its predecessor, while outscoring Qwen3.8-Max and DeepSeek-V4 Pro on the DeepSWE benchmark.

Z.ai released GLM-5.3-Flash under an MIT license, confirming it was the anonymous 'ox-alpha' model that had been topping OpenRouter and OpenCode leaderboards.

Alibaba's Qwen team shipped Qwen3.8-27B as Apache 2.0 open weights, the on-premise checkpoint promised alongside Qwen3.8-Max, with coding benchmarks that top Claude Opus 4.6 Max on two of four tests.

GitHub made Moonshot AI's Kimi K3 generally available in Copilot on August 6, briefly pausing the rollout to mitigate a GitHub Actions incident before resuming it the same day.

Nvidia's open-weight Nemotron 3.5 Lightning targets the repetitive execution layer of AI agents, launching alongside a NeMo Switchyard library that routes tasks between it and frontier models.

Meta released Muse Glimmer, a 30B-parameter open-weight model distilled from Muse Spark for local agent workflows, alongside a Zuckerberg essay on open-source AI.

Alibaba made its new flagship Qwen3.8-Max, a 2.4 trillion-parameter multimodal model, broadly accessible ahead of an open-weights release, sending its Hong Kong-listed shares up 7 percent.