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2026-07-17

Kimi K3 2.8T-A50B Breaks Open Model Records; Musk Open-Sources Grok Build Amid Controversy

Moonshot AI releases the largest open model ever, while Musk's Grok open-source code reveals traces of uploading entire user repositories. NVIDIA unveils Vera Rubin for agentic AI, and Databricks raises funding at $188B valuation.

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Moonshot AI released Kimi K3 2.8T-A50B, the largest open model ever, with 2.8 trillion parameters and Opus 4.8-class performance at Sonnet 5 pricing. The model ranks first in the frontend arena and demonstrated capabilities like autonomous chip design. Meanwhile, Elon Musk open-sourced Grok Build with 840,000 lines of Rust code, but traces of uploading users' entire code repositories remain, sparking controversy. In other news, NVIDIA announced Vera Rubin for post-training workloads, Databricks raised strategic funding at $188B valuation, and Thinking Machines Lab launched open-weight model Inkling.

Kimi K3 sets a new record for open-source model scale, challenging closed-source models like Claude Fable 5 and GPT 5.6 Sol.

Musk's open-sourcing of Grok Build is overshadowed by privacy concerns due to leftover code for uploading entire repositories.

NVIDIA's Vera Rubin targets cost efficiency for agentic AI, while Databricks' $188B valuation underscores strong investor confidence in data and AI.

Watch next: Watch for developer and community reactions to Kimi K3's open-source release and pricing changes, as well as any fallout from the Grok Build code controversy.

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Kimi K3 2.8T-A50B: Largest Open Model Ever Released, Opus 4.8-Class at Sonnet 5 Pricing

Moonshot AI released Kimi K3 2.8T-A50B, the largest open model ever, claiming Opus 4.8-class performance at Sonnet 5 pricing. This marks a significant milestone in open-source AI, continuing a trend of major open model releases.

Moonshot AI Launches World's Largest Open-Source ModelTechRepublic AIKimi K3 Released: First Open-Source 3T Model with 1M Context and Native Multimodalitymeng shao (X)Moonshot AI Releases Kimi K3: 2.8 Trillion Parameter Model, Priced Highest Among Chinese AI LabsSimon WillisonKimi's Open Model K3 Nears GPT-5.6 Sol and Fable 5, Signaling End of Super Cheap Chinese AITHE DECODERMoonshot AI Releases Kimi K3: Largest Open-Source Model with 2.8 Trillion ParametersDeepTech深科技
The AI Insider
8

Thinking Machines Lab Launches Open-Weight AI Model Inkling, Betting on Customizable AI

Thinking Machines Lab, the AI startup founded by former OpenAI CTO Mira Murati, released its first in-house model, Inkling, an open-weight system that developers and organizations can download and modify directly. The mixture-of-experts model contains 975 billion total parameters, drawing on roughly 41 billion for any given task, and was trained on 45 trillion tokens.

Thinking Machines Rolls Out Broad but Efficient ModelAI BusinessThinking Machines Lab Releases Open-Weights Model InklingSimon WillisonEx-OpenAI CTO Murati's Thinking Machines Drops Inkling, a 975B Parameter Model That Leads US Labs but Trails ChinaTHE DECODERThinking Machines Releases First LLM: 975 Billion Parameters, Fully Open Weights机器之心Thinkymachines Releases Open Multimodal Model InklingNVIDIA AI (X)Thinking Machines Lab Releases Its First ModelWIRED AIThinking Machines amps up its bet against one-size-fits-all AI with its first open model, InklingTechCrunch AI
InfoQ
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Musk Open-Sources Grok Build Overnight, But Code Still Contains Traces of Uploading Users' Entire Repositories

Elon Musk open-sourced Grok Build overnight, containing 840,000 lines of Rust code, but traces of uploading users' entire code repositories remain in the code, sparking controversy. The move is seen as a response to the previous scandal of 'secretly uploading entire code repositories.'

SpaceXAI Open-Sources Grok Build After Privacy BacklashTechRepublic AIxAI Open-Sources 'Grok-Build' on GitHub After Massive Data BreachTHE DECODERMusk Open Sources Grok Build After Alleged Upload of User Code Repos小互 (X)SpaceXAI Open-Sources Grok Build and Resets User Credits in Response to Security Incidentmeng shao (X)Elon Musk's Grok Build Open-Sourced, Reaches 2.2k Stars on GitHub向阳乔木 (X)xAI Open-Sources Grok Build After Privacy BacklashSimon WillisonGrok Build Open-Sourced, Usage Limits Reset for All UsersGeek (X)xAI Open-Sources Grok Build and Resets Usage LimitsSpaceXAI (X)Grok Build Is Now Open SourcexAI Blog
量子位
5

Kimi K3 Sets Record with 2.8 Trillion Parameters in Open-Source Model

Kimi released the K3 model with 2.8 trillion parameters, setting a new record for open-source model scale. The model ranks first in the frontend arena, surpassing Fable 5, and demonstrated capabilities such as autonomous chip design and GPU compiler development within 48 hours.

Kimi K3 Released: China's Fable 5 Arrives!机器之心Kimi K3 Tops Arena Benchmark, Skips Video GenerationInfoQKimi's New Model K3 Tops Coding Benchmark, Surpasses Fable 5钛媒体AGIKimi K3 Tops Arena Benchmark, Skips Video GenerationAI前线
小互 (X)
4

Moonshot AI Releases Kimi K3: World's First 3 Trillion Parameter Open Model

Moonshot AI has released Kimi K3, the world's first open model with 3 trillion parameters. According to benchmarks, K3 lags behind the closed-source Claude Fable 5 and GPT 5.6 Sol but is on par with GPT 5.5 and Opus 4.8. Pricing has increased two to three times compared to the previous K2.6, with input and output costs rising to $3.00 and $15.00 respectively.

Kimi Releases First 2.8 Trillion Parameter Open-Source Model K3, Nubia Announces Second-Generation 'Bean Bag Phone'APPSOKimi K3 Aesthetic Showcase: Independently Generated HTML+CSS Styles向阳乔木 (X)Kimi K3 Launches, Advises Buying Token Plan歸藏(guizang.ai) (X)
NVIDIA AI Blog

NVIDIA Vera Rubin Maximizes Intelligence per Dollar for Post-Training Workloads - a Key Metric for Agentic AI

NVIDIA announces Vera Rubin, a platform designed to maximize intelligence per dollar for post-training workloads, a key metric for agentic AI. The system achieves the lowest cost per token through extreme codesign, targeting the growing demand for efficient AI training and inference in the agentic era.

SynthePulse InsightRead deep analysis
Hacker News (AI filter)

On-Chain Bond Market Where AI Agents Issue Debt

A new protocol called sellbonds.now enables AI agents to issue, lend, and borrow USDC on-chain, creating an autonomous bond market. The project is experimental and open source, aiming to explore agentic autonomous finance where AI agents act as independent financial actors.

SynthePulse InsightRead deep analysis