タグ: Open-source model

Meituan has open-sourced LongCat-2.0, a 1.6 trillion-parameter Mixture-of-Experts model with a native 1-million-token context window, released on June 30, 2026 under a permissive MIT license. It is the model that quietly topped global developer charts on OpenRouter for two months under the codename “Owl Alpha”, and Meituan says it is the first trillion-parameter model trained and served end-to-end on Chinese-made chips, with no Nvidia GPUs involved. This article breaks down what LongCat-2.0 actually is, how its unusual architecture keeps a 1.6T model cheap to run, what the vendor-reported benchmarks claim, and how you can try it today. We also flag where the hype outruns the evidence, because the headline numbers […]

GLM is the family of large language models built by Zhipu AI, the Chinese lab now trading as Z.ai. If you typed “what is GLM” expecting the statistics term or the Bosch laser measure, this is the other one: GLM is a direct open-weight rival to ChatGPT, Claude and Gemini, and its current flagship GLM-5.2 scores high enough on independent benchmarks to sit in the same conversation as models that cost six times more to run. The reason GLM matters to you is simple. Every model in the family is open-weight and MIT-licensed, so anyone can download it, run it, or build on it for free, and the paid API […]

Most AI models people call “open source” are not actually open source. They are open-weight, a narrower thing, and the gap between the two decides what you can legally do with a model, how much you can trust it, and whether anyone could ever rebuild it. In October 2024 the Open Source Initiative finally drew a hard line with its first formal Open Source AI Definition, and by 2026 that line separates a handful of fully open models from the dozens that just look open. This guide explains what open source AI really means, why the open-weight versus open-source distinction matters to you, and which of today’s big models fall […]

The best open source AI models now score within single digits of GPT-5.5 and Claude Opus 4.8 on most benchmarks, and you can download their weights for free. GLM 5.2 posts a 62.1 on SWE-bench Pro, DeepSeek V4 hits 80.6 on SWE-Bench Verified, and Gemma 4 runs on a laptop while scoring 85.2% on MMLU-Pro. The gap between open and closed AI has never been smaller. This guide ranks the open source AI models worth your time in 2026, what each one is genuinely best at, and how to actually run them without a rack of GPUs. We tested the picks against current benchmark data, license terms, and real accessibility, […]

Update, June 21, 2026: The first independent benchmarks have landed since launch and now rank GLM 5.2 as the strongest open-weight coding model, and the open weights are available for self-hosting. Scores and analysis are below. GLM 5.2 arrived on June 13, 2026, and it lands with three headline numbers: a 753-billion-parameter Mixture-of-Experts design, a 1-million-token context window, and an MIT license that makes the weights free for anyone to download and run. Chinese AI lab Zhipu AI (operating as Z.ai) shipped it as a coding-first frontier model, and the timing was not subtle. It went public just two days after the US ordered Anthropic to cut foreign access to […]

Moonshot AI released Kimi K2.7 Code on June 12, 2026, and it is one of the largest open-weight coding models you can download right now. It packs 1 trillion total parameters, activates 32 billion of them per token, runs a 256K-token context window, and ships with open weights on Hugging Face under a Modified MIT license. It is also part of a wave of Chinese coding models making headlines this month, alongside ByteDance’s Seed 2.1 Pro, which just ranked #8 on Code Arena: Frontend. The headline pitch is efficiency, with Moonshot claiming the model uses about 30% fewer reasoning tokens than the previous K2.6 while scoring higher on its coding […]

The city government of Rio de Janeiro just released a frontier-class open AI model. It is built to go head to head with the best open systems on the planet. Rio 3.5 Open 397B comes from IplanRIO, the municipal IT company that runs Rio de Janeiro’s digital services. On its own benchmarks it edges out Alibaba’s Qwen 3.7 Plus on several tests, though the open-weight benchmark crown now belongs to GLM 5.2. That is not a typo. A city hall shipped a 397-billion-parameter model under a fully open license. Here is the honest version of the story. Rio 3.5 Open 397B is not built from scratch. It is fine-tuned from […]

GreenPT runs every conversation on 100% renewable energy inside European data centers, and it claims a 40% lower CO₂ footprint than US hyperscalers. That single promise, sustainable AI chat that keeps your data in the EU, is the whole pitch behind this growing ChatGPT alternative from the Netherlands. This GreenPT review covers what it is, what it costs, whether there is a free version, how the API works, and whether the green claims actually hold up. You will get the exact pricing in euros, the model lineup behind the chat, and an honest look at where the sustainability story gets complicated. By the end you will know if GreenPT fits […]

A Chinese AI lab just released a free model that scores 80.8 on SWE-Bench Verified and 75.3 on Terminal-Bench 2.1, putting it in the same league as GPT-5.5 and Claude Opus 4.7 on real coding work. It is called Nex-N2-Pro, it dropped on June 2, 2026, and it costs nothing to download. The model comes from Nex AGI, ships under a permissive Apache 2.0 license, and is built specifically for agentic tasks like writing code, calling tools, and running long, multi-step workflows on its own. This is one of the clearest signs yet that open-source AI has caught up with the frontier on the tasks developers actually care about. In […]

On June 4, 2026, NVIDIA released Nemotron 3 Ultra, a fully open 550 billion parameter reasoning model built specifically for long running agents. According to benchmark platform Artificial Analysis, it is now the most capable open model to come out of a US lab, scoring 48 on the Artificial Analysis Intelligence Index. That puts it well ahead of every other open American model and lands it in what Artificial Analysis calls the most attractive quadrant on its chart, combining high intelligence with fast output speed. Microsoft entered the in-house model race days earlier with its MAI lineup at Build. Nemotron 3 Ultra is a flagship example of open source AI […]