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Open source model signals

2026-09-13 · reviewer verdict: pass (confidence 0.75) · run 23f9cda1

With a 3-search budget (per standing guidance) and 4 fetched pages, this run confirms 2 open-source model releases inside the Sept 6–13, 2026 window: IBM/NASA's Lunar Foundation Model (dated Sept 10, 2026 press release) and DeepSeek-V4.1-Flash (MIT-licensed MoE, referenced as newly dropped on/about Sept 10, 2026 on Hugging Face). A Hacker News thread on Cognition's SWE-2 shows active developer discussion of new coding models this week, but SWE-2's open/closed license status could not be confirmed from the fetched page, so it is excluded from the open-source ranking. Ranked by corroboration: 1) DeepSeek-V4.1-Flash — 2 fetched independent sources — signal; 2) NASA-IBM Lunar Foundation Model — 1 fetched source — noise/unconfirmed. No Reddit thread was reached this run. Coverage (2 confirmed open models) is below the 4–6 target, so more evidence is recommended before calling either a strong trend.

Models, most corroborated first

What people are saying

• IBM and NASA jointly announced the open-source release of a Lunar Foundation Model on Sept 10, 2026, described as one of the first publicly available foundation models for lunar scientific exploration. [S1]
• DeepSeek's V4.1-Flash exists as a live Hugging Face repository with usage guides for Transformers, vLLM, and SGLang, and a downstream quantization card notes that as of Sept 10, 2026 no inference engine yet served the format, with vLLM PRs filed 'the morning the model dropped.' [S3] [S4]
• A Hacker News thread about Cognition's new SWE-2 model gathered 443 points and 190 comments within 2 days of posting, indicating active developer-community interest in new model releases this week. [S2]

Caveats

• Search budget (3 web_search calls) was exhausted before locating 4-6 named open-source models; only 2 were confirmed with fetched, in-window sources.
• No Reddit thread (r/LocalLLaMA, r/MachineLearning, r/OpenSource) was searched or fetched this run despite being a primary target market.
• DeepSeek-V4.1-Flash's exact release date is inferred from an engine-support note rather than an explicit dated announcement.
• Cognition SWE-2's open-source or proprietary licensing status could not be confirmed from the fetched Hacker News thread; it is excluded from the ranked open-source list.
• Economics fields are unsourced placeholders (all zero) — this is a research/monitoring signal report, not a priced product, per owner instruction not to treat unvalidated numbers as sourced.

Sources

• S1 https://newsroom.ibm.com/2026-09-10-ibm-and-nasa-release-open-source-ai-model-to-support-lunar-exploration — "IBM and NASA today announced the open-source release of the NASA-IBM Lunar Foundation Model, one of the first publicly available foundation models for scientific exploration of the Moon, now available." (fetched 2026-09-13)
• S2 https://news.ycombinator.com/item?id=49645443 — "Cognition launches new SWE-2 model, Rivaling Fable 5.1 and GPT-Astra: 443 points, posted 2 days ago, 190 comments." (fetched 2026-09-13)
• S3 https://huggingface.co/deepseek-ai/DeepSeek-V4.1-Flash — "Instructions to use deepseek-ai/DeepSeek-V4.1-Flash with libraries, inference providers, notebooks, and local apps." (fetched 2026-09-13)
• S4 https://huggingface.co/LibertAIDAI/DeepSeek-V4.1-Flash-NVFP4 — "As of 2026-09-10 no released engine serves deepseek_v41, though vLLM has open PRs filed the morning the model dropped and SGLang has merged a cookbook plus initial support." (fetched 2026-09-13)