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Jais 2: A Family of Arabic-Centric Open Large Language Models

A second-generation family of Arabic-centric open large language models, released with a technical report covering the data, training recipe and evaluation behind the models.

Why it mattersArabic-centric open weights fill a real gap for teams serving non-English users where frontier models are weaker or unavailable. The training report also documents choices that transfer to other language-specific model efforts.

articleMohamed Anwar, Abed Alhakim Freihat, George Ibrahim, Mostafa Awad, Abdelrahman Sadallah, Gurpreet Gosal, Gokulakrishnan Ramakrishnan, Sarath Chandran, Biswajit Mishra, Rituraj Joshi, Ahmed Frikha, Etienne Goffinet, Abhishek Maiti, Ali El Filali, Sarah AlBarri, Samujjwal Ghosh, Rahul Pal, Parvez Mullah, Awantika Shukla, Sajid siddiki, Samta Kamboj, Onkar Pandit, Sunil Kumar Sahu, AbdelRahman Elbadawy, Amr Mohamed, Ahmad Chamma, Evan Dufraisse, Abdelaziz Bounhar, Dani Bouch, Hadi Abdine, Guokan Shang, Fajri Koto, Yuxia Wang, Zhuohan Xie, Ali Mekky, Rania Elbadry, Sarfraz Ahmad, Momina Ahsan, Omar El Herraoui, Daniil Orel, Hasan Iqbal, Kareem Elzeky, Mervat Abassy, Kareem Elozeiri, Saadeldine Eletter, Farah Atif, Nurdaulet Mukhituly, Haonan Li, Xudong Han, Aaryamonvikram Singh, Zainul Abedien Ahmed Quraishi, Neha Sengupta, Larry Murray, Avraham Sheinin, Joel Hestness, Natalia Vassilieva, Hector Xuguang Ren, Zhengzhong Liu, Michalis Vazirgiannis, Preslav Nakov

Inducing Reward-Free Judging Rubrics that Reduce Over-Crediting in Agent Evaluation

RubricForge evolves an agent-judging rubric against ground-truth-labeled trajectories rather than hand-writing it, targeting the tendency of automatic judges to credit fluent but unsuccessful runs as successes.

Why it mattersOver-crediting is the main way agent eval suites lie to their owners, and hand-written rubrics are where it enters. Grounding the rubric text in environment reward is a directly copyable fix.

articleDarragh Quinn, David Dylan, Roisin Healy, Fionn Carroll, Maeve Donnelly, Cormac Sheehan

Not All Tokens Are Equal: Inflation-Aware Routing for Agentic LLM Systems

Names token inflation, the gap between a model's per-call price and the true cost of a retrying agent workflow, measures it across model tiers and task types, then builds a router that prices on the corrected figure.

Why it mattersPer-token price is what most teams budget from, and it can understate real agent cost by more than double on hard tasks. Measuring inflation per tier turns model selection into an arithmetic decision instead of a guess.

articleHeming Fu, Shan Lin, Qianqian Xie, Guojun Xiong

Building AI-Intensive Software with AI: Early Results and a Cautionary Tale on Measuring Development Cost

A six-person team built a RAG-based onboarding assistant under pervasive AI assistance and priced it three ways.

Why it mattersAI cost-savings ratios are easy to construct wrongly: pricing tokens under a flat subscription and mispricing the human counterfactual doubled this team's claimed 19.4x down to 9.9x on recheck.

articleVictor Barros de Miranda Neves, Kiev Santos da Gama, Vinicius Cardoso Garcia

Does a Language Server Save Tokens for Coding Agents? A Measurement Methodology and Preliminary Study

Tests whether language-server retrieval actually saves a coding agent tokens compared with plain lexical search, proposing tokens-to-success as the metric and an ablation that isolates the difference at equal task success.

Why it mattersEvery coding agent has to decide between grep and a language server for retrieval, and the choice is currently made on intuition. A tokens-to-success framing makes that decision measurable.

articlePengcheng Xu

AI Evaluation Should Work With Humans

A position paper arguing that measuring superhuman autonomous performance steers AI development toward replacing people.

Why it mattersMost agent benchmarks implicitly score replacement rather than collaboration, which shapes what gets optimized. Practitioners building evaluation harnesses should know the case against that default.

articleJan Kulveit, Gavin Leech, Tom\'a\v{s} Gaven\v{c}iak, Raymond Douglas

ATLAS: Discovering Agent Strategies through LLM-Guided Abstraction and Automata Learning

ATLAS learns interpretable state machines from agent execution traces, recovering the strategies an agent actually follows instead of reporting only task success and raw logs.

Why it mattersTrace dumps tell you what an agent did once; a learned automaton tells you what it tends to do. That is a practical handle for auditing agent behavior before trusting it with a task.

articleIgnacio D. Lopez-Miguel, Andreas Happe, J\"urgen Cito, Ezio Bartocci, Bettina K\"onighofer, Martin Tappler

Breaking Models to Test the Judge: A Mutation Testing Approach for Semantic Evaluators of Domain Class Diagrams

Rather than asking humans whether an LLM judge is right, inject known semantic defects and see if it catches them.

Why it mattersIf you rely on an LLM judge, mutation testing gives you a way to measure whether it actually detects defects instead of trusting spot-checks: inject known faults, score detection, compare to human validation.

articleKevin Delcourt, Meriem Ben Chaaben, Abdelhamid Rouatbi, Luciano Marchezan, Houari Sahraoui

DepWareTrans: Dependency-Aware Incremental Repository Migration across Co-executable Languages

Traces repository-scale code translation failures to dependency inconsistency between files.

Why it mattersAnyone pointing an agent at a whole-repo migration hits fragmentation across inter-file dependencies. Naming dependency inconsistency as the root cause suggests where to spend orchestration effort.

articleSivajeet Chand, Alexander Pretschner, Steve Haupt, Derui Zhu, Sushant Kumar Pandey

Engineering Reliable Coding Agents: Evaluating and Operating the System Around the Model

A monograph on operating coding agents as systems rather than models, locating reliability in the harness, execution state, retrieval, memory, permissions and review surfaces that surround the model.

Why it mattersTeams debugging agent failures reach for a better model first, when the defect is usually in the surrounding system. This gives a structured place to look and a vocabulary for evaluating the harness itself.

articleStephanie Jarmak

GRPO Beyond English: A Large-Scale Study of GRPO in Non-English and Multilingual Settings

A large study of reinforcement learning with verifiable rewards outside English, sweeping base models, training languages and reasoning-language rewards.

Why it mattersTeams doing RLVR post-training outside English have been extrapolating from English-only results. This says the native-language reasoning penalty is small, which changes how those training runs get configured.

articleKonstantin Dobler, Federico Scozzafava, Jonathan Janke, Mohamed Ali, Simon Lehnerer

LegacyWorld: Atomicity-Aware Evaluation of GUI Agents for Legacy Workflows

An evaluation of graphical-interface agents on stateful legacy workflows that scores atomicity, counting the invalid changes a failed run leaves behind rather than only whether the task eventually succeeded.

Why it mattersMost agent benchmarks score the end state and ignore the wreckage of failed attempts. For anyone deploying computer-use agents against real records, partial-failure damage is the risk that actually matters.

articleThilo Reintjes, Sivajeet Chand, Derui Zhu, Sushant Kumar Pandey, Alexander Pretschner

Modular Cognitive Architecture Emerges in Large Language Models

Circuit analyses across 46 tasks in four cognitive domains find that language models develop specialized regions echoing human brain organization.

Why it mattersIf task families recruit distinct neuron populations, that is a handle for interpretability work, targeted editing, and reasoning about which capabilities interfere. It reframes model internals as modular rather than uniformly entangled.

articlePengrui Han, Jacob Andreas, Evelina Fedorenko, Andrea Gregor de Varda
Noam Brown@polynoamial

Codex exposes an opt-in 1M-token context window for GPT-5.6 Sol, newly documented after repeated requests. OpenAI tuned the default lower on purpose and says autocompaction is near-seamless — its own researchers advise against raising the limit.

Why it mattersCodex now documents an opt-in 1M-token context for GPT-5.6 Sol, but OpenAI's own researchers say the tuned default with autocompaction wins on both performance and cost.

A/B test models in production

Together's endpoints can now split live traffic across a control and up to 20 model variants, ramp a winner via blue-green rollout.

Why it mattersModel A/B splits move from feature flags and hash-mod routing in your application to the endpoint itself, so you can expose a candidate model to a chosen slice of real users and unwind it with one call.

articlewww.together.ai

Activity Dashboard

Usage analytics for teams running agents.

Why it mattersPer-agent, per-model and per-request spend, cache hit rate and tail latency are now queryable and groupable.

articleOpenRouter

Deploy Cursor Origin repositories with Vercel in public beta

Vercel opened public beta support for Cursor Origin repositories.

Why it mattersAnyone weighing Origin needs to know the deploy path already exists, and the speed of the wiring shows how fast the ecosystem is adapting to a week-old hosting platform.

articleCody Wong

GPT-5.6 Sol is 50% off on AI Gateway for the next month

Vercel is running GPT-5.6 Sol at half price on its AI Gateway through September 18, across every service tier including fast mode.

Why it mattersAnyone already sending Sol traffic through this gateway gets the lower rate with no code change, and the window closes September 18.

articleJerilyn Zheng

DeepSeek V4 Pro 0813 vs Claude Fable 5 on DeepSWE: Cost, Coding, and Routing

A DeepSWE comparison of DeepSeek V4 Pro 0813 and Claude Fable 5 that measures a 90x cost gap and an unusually low per-task correlation, the property that makes escalation routing between them worthwhile.

Why it mattersCross-model disagreement, not average accuracy, is what makes a cascade pay off, and this puts a number on it for two models at opposite ends of the price sheet.

articlewww.together.ai

$12B of US ratepayers' money wasted on a modeling mistake and PJM wants to do it again

SemiAnalysis rebuilt PJM's black-box Reserve Requirement Study and argues its methodology ignores winter efficiency gains and post-Elliott resilience, understating capacity by ~4GW.

Why it mattersPower in America's largest electricity market is procured off a model that understates existing supply by roughly 4GW, inflating capacity costs and squeezing the grid headroom datacenter expansion depends on.

articleRobert Boswall

Qwen 3.8 27B is excellent, but it defaults to wildly overthinking things

Hands-on notes on Qwen 3.8 27B, the Apache 2 licensed vision-capable release from Alibaba's Qwen lab, run in quantized form on a 128GB MacBook Pro and an NVIDIA DGX Spark.

Why it mattersA capable vision model in the 27B range runs on a well-specced laptop, but its default reasoning effort makes it impractical there; anyone trying it should turn that setting down before judging the model.

articlesimonwillison.net

Guillermo Rauch on Vercel's Shift Toward Agentic Infrastructure

In this interview, Vercel founder Guillermo Rauch describes how the platform has evolved from deploying front-end websites to hosting AI coding agents and autonomous software, driven by models like Opus 4.5.

Why it mattersRauch argues platforms must shift from human-facing elastic compute to 'agentic infrastructure' that lets coding agents deploy, secure, and maintain software autonomously over hours or days.

videoStanford Online

awesome-claude-code

A curated, community-maintained list of resources for Claude Code, covering guides, skills, agents, status lines, developer tooling, plugins, and orchestration patterns.

Why it mattersIt aggregates guides, skills, agents, plugins, and observability tools for Claude Code in one continually updated place, saving practitioners from hunting across scattered repos and blog posts.

repogithub.com

Awesome Hermes Skills

A curated, install-ready directory for the Hermes Agent ecosystem from Nous Research, cataloging the agent's 82 built-in skills, a 117-skill optional catalog.

repogithub.com

Awesome Claude

A curated directory of Claude AI resources for developers, aggregating official Anthropic documentation, SDKs (Python, TypeScript, Java, Go, Ruby, C#, PHP), agent SDKs, cookbooks, quickstarts, cloud provider integrations (Bedrock, Vertex AI, Azure), system cards.

articleawesomeclaude.ai

Awesome Claude Code

A curated, hand-maintained list of resources for Claude Code, organizing links to guides, skills, agents, status lines, plugins, orchestration tools.

Why it mattersIt aggregates guides, skills, agents, plugins, and observability tools for Claude Code in one continually updated place, saving practitioners from hunting across scattered repos and blog posts.

repogithub.com
Tibo@thsottiaux

An OpenAI engineer documents the exact Codex config keys for running GPT-5.6 Sol at a one-million-token window, plus a single-session CLI override, with a warning that the shipped default was tuned deliberately for cost and performance.

Why it mattersCodex ships a tuned default context budget; these three config keys raise it to 1M tokens for GPT-5.6 Sol, and the capability now works on ChatGPT accounts rather than API keys only.

Tuhin Srivastava (Baseten) on Production Inference Economics

Baseten is an AI inference infrastructure platform that runs production machine learning models—including custom and post-trained open-source models.

Why it mattersBaseten's CEO makes the case that once you are at scale, renting a frontier API stops being the cheap option and post-training an open model becomes both the cost play and the moat.

videoStanford Online

Anthropic and Chai Discovery on AI-Accelerated Drug Development

A Stanford guest lecture transcript featuring Anthropic's Eric Abrams and Chai Discovery's Josh Meier discussing how AI models are being applied across drug discovery and life sciences R&D.

Why it mattersExplains specific technical bottlenecks in applying AI to the 10-15 year drug development pipeline and how Anthropic's Claude and Chai's molecular design platform are targeting them.

videoStanford Online

Yash Patel on the History and Future of AI Model Training

A Stanford talk transcript in which Applied Compute founder Yash Patel traces AI model development from AlexNet through transformers, scaling laws, RLHF.

Why it mattersArgues the next AI capability bottleneck is continual, data-efficient learning from sparse real-world feedback rather than more pretraining, and explains why verifiable domains like code and math currently dominate RL training.

videoStanford Online

The Economics of the AI Super Cycle: OpenAI's Compute Strategy (with Sachin Katti)

A Stanford class interview with Sachin Katti, who leads industrial compute at OpenAI and previously served as Intel's CTO, on how OpenAI plans and builds compute at gigawatt scale.

Why it mattersOpenAI's compute chief explains the roadmap to 30GW of capacity and why inference workloads will dominate future compute demand.

videoStanford Online

Ali Ghodsi on AGI, Enterprise AI, and Whether Software Is Dead

In this talk/interview, Databricks CEO Ali Ghodsi argues that AGI already exists by decades-old research definitions but remains useless inside companies because AI agents lack the tacit organizational context that veteran employees carry in their heads.

Why it mattersGhodsi argues that even if AGI meets old technical definitions, it remains blocked from real enterprise value by missing tacit organizational context that human employees hold.

videoStanford Online

Chase Lockmiller (Crusoe) on the AI Data Center Economy

A fireside talk with Crusoe founder and CEO Chase Lockmiller explaining how AI infrastructure is built.

Why it mattersCrusoe's Abilene campus shows energy availability, not GPU supply, is now the binding constraint on scaling AI compute, and negative power prices in West Texas are actively shaping where hyperscale AI infrastructure gets built.

videoStanford Online

Brad Gerstner and Sunny Madra on the Economics of AI Inference

A fireside chat transcript in which Altimeter Capital's Brad Gerstner and Groq's Sunny Madra discuss why AI inference, unlike traditional software, has significant marginal compute costs, tracing Groq's origins, its bet on cloud-hosted inference chips, and the shift toward reasoning models that consume vastly more tokens.

Why it mattersExplains why reasoning models' heavy token consumption changes inference cost structure, and details the prefill/decode disaggregation strategy Groq used to improve inference efficiency at scale.

videoStanford Online
GitHub@github

GitHub made Balanced depth generally available for Copilot code review alongside the existing Lite mode, with the default settable at the organization or repository level and overridable when requesting a review on a single pull request.

Why it mattersTeams running Copilot code review can now put deeper analysis on risky pull requests and keep lightweight reviews on routine ones, set as a default or chosen per request.

Lenny Rachitsky

OpenAI’s Head of Design: This is the best time in history to be a designer | Ian Silber

podcast

GLM 5.3 Is HERE – Is THIS the BEST Open Model Yet?

A hands-on test of GLM 5.3 across browser workflows, C++ game development, 3D CAD modelling, frontend design and FPS generation, asking whether it earns the title of best open model yet.

Why it mattersGives practitioners a task-by-task read on whether GLM 5.3 holds up as a coding model against the closed frontier, which is the decision anyone weighing an open-weight backend actually has to make.

videoBijan Bowen
Tibo@thsottiaux

An argument that a token is not a standard unit: identical text costs different token counts on different tokenizers, so a cheaper per-token price can still produce a larger bill. One sample measured 766 tokens on GPT-5.6 Sol against roughly 1,170 for Claude Opus 5. Vendor-authored, so verify on you

Why it mattersComparing list price per token across models with different tokenizers understates the real bill. Tokenize your own representative text before choosing on price, then measure cost per completed task.

Nous Research@NousResearch

Hermes Agent Desktop gains Bot Mode: instead of ephemeral sessions, you define persistent bots with jobs, descriptions and avatars that can hand work to each other. Nous opened a public beta window for it.

Why it mattersHermes Desktop moves from one-session-per-chat to persistent agent profiles with assigned jobs that can talk to each other — a local multi-agent setup available to try in the public beta.

sankalp@dejavucoder

A blog post detailing how the author used Codex as an autonomous research loop—iterating over 1500 submissions across 14 days—to optimize a batched Householder QR decomposition CUDA kernel, placing 12th of 183 in a GPU Mode contest with a 232x speedup over baseline.

Why it mattersIt shows what an agent loop can do when the scoring signal is fast and objective, and names the harness conditions that made it work. That is a reusable pattern for anyone pointing a coding agent at an optimization problem.

Thariq@trq212

Claude's text watermark changes where sampling randomness comes from rather than which words get picked, which is why output quality is unaffected. Anthropic is rolling it out for EU AI Act compliance; an interactive explainer walks the mechanism step by step.

Why it mattersWatermarking is landing in Claude's text output under the EU AI Act, and it works by shifting the randomness source rather than the words — quality is unchanged, but generated text becomes detectable.

Go from an empty repo to a live GitHub Pages site on a custom domain, secured wi

GitHub shows Copilot CLI plus a community Namecheap skill going from an empty repo to a live GitHub Pages site on a custom domain with HTTPS in about 14 minutes.

Why it mattersShows the skill mechanism in a coding CLI reaching past code into registrar and DNS setup, which is the kind of end-to-end delegation builders are trying to scope right now.

articlegithub

React for Agents: Astro Creator Brings Hooks to his Meta-Harness, Flue

Fred Schott's Flue reaches its first stable release built on React-style Agent Hooks, where an agent is a JavaScript function that re-renders before every model call and can manage its own state and attach capabilities mid-run.

Why it mattersAgent Hooks are a concrete answer to how agent state and capabilities get composed at runtime, from the person who built Astro. Engineers picking a harness now have a second serious design to compare against Vercel's eve.

articleRichard MacManus

CORS Chat

Simon Willison's browser-based chat client for any OpenAI Responses-compatible endpoint that sends CORS headers, built to exercise local models in LM Studio and OpenRouter.

Why it mattersA zero-install way to exercise a Responses-compatible endpoint, including a locally served model, which removes the usual scratch-script step when validating a new provider or a local runtime.

articlesimonwillison.net

Building an AI Text Detector From Scratch

Sebastian Raschka builds a small AI-text detector from scratch, then turns it into a verifier used to train a small language model to write text that evades detection, as a study of where such detectors break down.

Why it mattersShows how to build a classifier-as-verifier and train an SLM against it, a reusable pattern for anyone wiring reward or filter signals into small-model training.

articleSebastian Raschka, PhD

Voice agents with Realtime Video — Sidney Primas, LemonSlice

A production account of real-time video avatars.

Why it mattersAnyone building real-time multimodal agents gets the specific failure mode of long-running generated video and the fixes that keep an eight-hour session coherent.

videoAI Engineer

Diagnostic Foundation for Evaluating LLMs' Research Integrity as Co-Scientists

IntegrityBench tests whether models uphold research integrity under institutional pressure across 36 paired tasks.

Why it mattersAnyone deploying models as autonomous research or review agents now has a measured failure rate under pressure, and evidence that scaling up the model does not fix it.

articleYash Tripathi, Silu Sharma, Sai Sidhanth Manoharan Jayanthi, Shivank Garg, Lin Li

Research Assistant: AstraZeneca's Agentic System for R&D

AstraZeneca describes Research Assistant, an internal LLM system answering biomedical questions across literature, knowledge graphs, chemistry, clinical trials and internal experimental data.

Why it mattersPublished architecture and deployment lessons from a real enterprise agent system give builders a reference design for grounding, provenance, and mode selection.

articlePiotr Grabowski, Mohamed Alameen, Jorge Bretones, Sabina Cardell, Miguel Carmona, Gavin Edwards, Ben Grainger, Sameh Hassan, Erik Jansson, Artur Kuziakhmetov, Albert Maristany, Hebatallah Mohamed, Andriy Nikolov, Sebastian Nilsson, Mark O'Donoghue, James Pacileo, Ashiq Sultan, Alex Voegele, Michael Ughetto

Position: The Alignment Community is Unintentionally Building a Censor's Toolkit

An ICML oral argues that alignment methods are dual-use.

Why it mattersThe same machinery that suppresses harmful output is general-purpose output control — worth understanding if you ship alignment or moderation layers that a downstream operator could repurpose.

articleSarah Ball, Phil Hackemann

Don't Want Your LLM to Recommend Nuclear Strike? Try Asking It in Japanese

Nine models are asked in different languages whether a nuclear-armed state should strike a defenceless one.

Why it mattersSafety behavior measured only in English does not transfer, and reasoning-language is an uncontrolled variable in any multilingual agent deployment or eval suite.

articleRian Touchent (ALMAnaCH)

An index of the vibe-coding frontier. Corrections welcome.