Open source

AISatya Nadella says any pursuit of superintelligence must help humanity and remain under human control, and that AI benefits should spread across countries, communities, and companies. He argues for a frontier ecosystem where closed and open-source models both thrive, and that organizations should keep control of their tacit knowledge and learning loops without depending on a single model provider. Microsoft plans to publish its first-party MAI models' "Code of Conduct" for public consultation tomorrow.

AIShanghai AI Lab's InternLM team released Intern-S2-397B, a multimodal foundation model for scientific intelligence and long-horizon agents. The model uses visual pre-training on raw scientific literature pages, multi-task reinforcement learning across more than 20 scientific domains, and agentic reinforcement learning in sandboxed environments.

AIMike Knoop says he sees a path to an ARC-AGI-4 benchmark focused on open-ended invention, which he calls the gating capability between zero-sum automation and positive-sum innovation. He argues that coordinated slowdown efforts would likely apply to everyone, including open-source work, and cites chain of thought and the transformer as inventions that grew out of open science research. He concludes the research frontier must stay open to keep humanity on a positive-sum path.

AIInferact says vLLM now supports DeepSeek v4.1 Flash on day zero across H100, H200, B200, B300, GB200, and GB300 GPUs. SemiAnalysis independently verified the NVIDIA support, while the post notes AMD vLLM still does not work with the model. Serving recipes are available at recipes.vllm.ai.

AIDeepSeek released open weights for V4.1-Flash, which Baseten now offers through its Model APIs. The model has 552B total parameters, 8B active for prefill and 16B for decode, a 1M token context window, and text plus image input. Its Causal Encoder-Decoder design runs only the encoder during prefill and reuses a projected KV cache, and the source reports the global KV cache at a quarter of V4-Flash's memory.

Why it matters: The post explains how the CED architecture splits prefill and decode compute and cuts KV cache memory, which matters for coding agent costs.

AILM Studio has launched its Bionic version, now live for users. The announcement is tied to DeepSeek-V4.1-Flash, the smallest model in DeepSeek's new architecture family, which adds native visual understanding and targets faster inference and higher throughput.

AINathan Lambert has compiled a reading list of open-model writing covering why labs release open weights, the open-versus-closed debate, and US-China competition, last updated 15 September 2026. The list includes pieces on open-model economics, safety and marginal-risk research, and recent Chinese releases such as Kimi K3 and GLM-5.2. It also cites lawmaker inquiries into Western companies' use of Chinese models.

AIShanghai Artificial Intelligence Laboratory has released Atria Dawn Preview, an agentic model built on the 744B-parameter MoE GLM-5.2 foundation model, with a 256K context window. The release page reports benchmark results across search, coding, tool use, productivity, and cybersecurity, and describes text-only setup for Codex and Claude Code.

Why it matters: The release page gives a full benchmark table against named rivals and setup steps for Codex and Claude Code, useful for anyone evaluating agentic models.

AITogether AI expanded its Fine-Tuning service with support for newer open-weight models, live metrics tracking, and finer training controls. Expert LoRA adapters can be applied to Mixture-of-Experts expert layers, and early stopping keeps the checkpoint with the best validation loss. Dataset previews, sample weights, pre-flight validation, and lower prices on selected models are also included.

AIAi2 released AstaBrief-8B-SFT, an 8B intermediate supervised fine-tuning checkpoint built on Qwen3-8B that turns a research question and retrieved literature excerpts into a cited report. On the ScholarQA-CS2 test set of 100 computer science questions, it scored an average of 83.7 versus 77.3 for base Qwen3-8B, with citation recall at 71.3 versus 64.6. The model is licensed under Apache 2.0 for research and educational use.

AIOllama announces that the DeepSeek V4.1 Flash model is available on its library, with a link to the model page. The post provides no further details about capabilities, parameters, or pricing.

AIThe Gemini app is now available for Windows, letting users open it with the Alt + Space shortcut. From any app, it can polish drafts, summarize long documents, brainstorm ideas, and create custom images and videos.

AICognition has welcomed Jonathan Kelley and the Dioxus team, whose framework Cognition used extensively to build and improve Devin's performance. Cognition plans to continue supporting Dioxus, Blitz, Taffy, and Subsecond while increasing investment in Dioxus-Native and Blitz. The Dioxus team will also work on Devin's virtual machine, computer use skills, and testing capabilities.

AIRadixArk has published a cookbook on its Miles documentation site covering how to run DeepSeek V4.1 Flash. The post itself contains only a link to the cookbook page, so no further details about features, figures, or setup steps are available.

AIRadixArk says Miles brings day-0 RL support to DeepSeek-V4.1-Flash, with SGLang providing inference support. The post says quantization-aware training mirrors SGLang's FP4/FP8 rounding, and that colocated training and rollout fit full-parameter RL on 16 GPUs. In a DAPO run over steps 0–80, per-token trainer–rollout KL stayed at 0.0012–0.0017 while reward rose from 0.51 to 0.78.

Why it matters: The post pairs day-0 inference and RL support with specific training-consistency details, showing how the new architecture is handled in practice across GPUs.

AISGLang and Miles ship day-0 inference and RL support for DeepSeek V4.1 Flash, with weights now available. The model is natively multimodal with 552B backbone parameters, 16B active during decode and 8B during prefill, and supports up to 1M context. V4.1 adds shared compressed KV across layers, a two-stage sparse indexer, and a 196B Engram lookup memory.

Why it matters: The post lists the architecture changes and parameter counts for V4.1 Flash, giving readers concrete specs to compare against earlier DeepSeek V4 releases.

AIDeepSeek says it will work with the open-source community on inference support for DeepSeek-V4.1-Flash and explore more deployment options. The company is inviting organizations planning large-scale deployments with 2,000 GPUs and a storage cluster to get in touch. The model and a technical report are published on Hugging Face.

AIBAAI released open-source resources for three AIDD projects on Hugging Face: EPT, an equivariant pretrained transformer for unified 3D molecular representation learning, and UniPath, a learnable-time flow matching method for crystal structure and energy prediction. The repository mirrors their GitHub source code and READMEs, with setup, preprocessing, training, and evaluation documentation. The MiSI benchmark is released separately on Hugging Face.

AIDeepSeek released DeepSeek-V4.1-Flash, a multimodal Mixture-of-Experts model with 552B backbone parameters and support for contexts up to one million tokens. The technical report says its global KV cache footprint is 890 bytes per token, roughly one quarter of DeepSeek-V4-Flash, and reports 8B activated parameters per token during prefill and 16B during decode.

Why it matters: The report shows KV cache per token falling to about one quarter of DeepSeek-V4-Flash, a concrete tradeoff between long-context serving cost and benchmark results.

AIFireworks AI describes a four-stage path for teams moving from renting closed frontier models to training their own, starting with API use and prompt, context, and harness engineering. The post uses the UIPad computer-use dataset to show that Kimi K3 ties GPT 5.6 Sol overall at 87.7 but wins three of four categories while costing about half as much, suggesting routing. After roughly three hours of training on the training split, the tuned Kimi K3 outperforms GPT 5.6 Sol on the held-out test set.

AITinker says it and OpenResearch let agents test dozens of competing published post-training methods automatically, with compute cost forecast to within a dollar. The main post cites a grant-supported effort, while the quoted alphaXiv post says agents reproduced SDFT's continual learning benefits across Qwen3-8B and Qwen3-30B-A3B over multiple seeds.

AIRadixArk says its Miles framework natively supports SGLang for fast rollouts while keeping rollout and training aligned for reliable post-training at scale. The post thanks the community for contributions and feedback shaping Miles. A related post from @adarshxs describes Miles v0.1 running fully async agentic RL on a 744B MoE across 64 GB300 GPUs.

AIRadixArk links to an arXiv paper, identified as 2609.08368, in a post that gives no further detail. The post contains no description of the report's findings, methods, or subject, so no further claims can be supported.

AIGoodfire used Ai2's open post-training stack, including the Dolci preference dataset, intermediate Olmo checkpoints, and OLMES evaluations, to trace a safety regression in Olmo. Preference training made Olmo more likely to comply with harmful requests on a refusal benchmark, and Goodfire linked part of this to specific Dolci examples where the preferred response encouraged compliance. Because Ai2 publishes the individual preferred and rejected responses, researchers could test targeted changes to reduce the regression.

AIGoogle announced general availability of ADK for Kotlin 1.0, a Kotlin Multiplatform framework for building AI agents on servers and Android. Version 1.0 reaches feature parity with ADK 1.0 Core and adds Android extensions for on-device models, cloud Gemini via Firebase AI Logic, and persistent sessions and memory with Room and AppSearch. The post includes a server-side incident triage example using KSP-generated tools and skills, plus an Android financial assistant example with human confirmation for transfers.

Why it matters: The post names the new Android and server-side capabilities and the code setup, helping Kotlin developers judge whether ADK fits their agent projects.

AIInferact says months of vLLM tuning for agentic workloads, validated on SemiAnalysis's AgentX benchmark, let open-source models reach up to 130K tokens per GPU-second. The company claims this is 106 times cheaper than Opus 5 API pricing. The work is described as part of a vLLM blog post covering architecture, framework, and runtime optimizations.

AIWerner Vogels says that after spending time with Kiro Crew since its launch, its memory system stands out for deciding what to keep, compress, and let go. He notes that Amazon engineers, starting from engineering constraints, arrived at an approach resembling the brain's evolved architecture. Per the referenced post, Kiro Crew is a persistent workspace that retains project context across sessions and runs scheduled jobs.

AICohere Labs has released Tiny Aya Base 32K, an open-weights pretrained model with 3.35 billion parameters and a 32K context window. The model covers 70+ languages, including many lower-resourced ones, and is designed for downstream adaptation and long-context research. It is a base model that has not been instruction-tuned, and it is licensed under CC-BY-NC.