Moonshot AI Releases Kimi K3 Weights for 2.8T Model, Publishes Technical Report
Moonshot AI released the model weights and technical report for Kimi K3, a 2.8T-parameter mixture-of-experts model with native visual understanding and a 1M-token context window. The company said the new architecture delivers 2.5x the intelligence per unit of compute and said it is also open-sourcing more of the software stack behind the model, including attention kernels, a communication library for distributed MoE workloads and infrastructure for running agent environments at scale.
Kimi K3 was made available on Nebius on launch day, with day-0 support from vLLM and availability in Cognition's Devin Desktop and CLI. The Kimi K3 license says model-as-a-service businesses making more than $20M a year need a separate agreement, while products with more than 100M users or $20M a month in revenue must display "Kimi K3." Later in the day, Arena ranked Kimi K3 No. 1 among open-weight models in Agent Arena with +9.75% net improvement, ahead of GLM-5.2 Max at +7.12%.
From the sources (25 posts)
@modalKimi K3 drops tomorrow. Day 0 support on Modal.
@teortaxestexmeanwhile time in China: 00:32 Monday, July 27, 2026 Strictly under 24 hours until an open frontier model
@kimmonismusQuick reminder on Kimi k3 open weights
@aaazzamRT @modal: Kimi K3 drops tomorrow. Day 0 support on Modal.
@togethercomputeKimi K3 lands on Together tomorrow. Available on Provisioned Throughput: reserved token-based capacity that just works: 1/ Guaranteed tok/min
@businessMoonshot AI is poised to make its Kimi K3 model available for public download, expanding its reach in the global open software community at a time of growing US concern about Chinese encroachment into the top echelons of AI development http
@cointelegraph🇨🇳 JUST IN: China's Moonshot AI is set to release its Kimi K3 model weights for free public download, widening its reach in the open-source AI race against US rivals.
@brianroemmeleLocal Kimi K-3 download day in just a few hours! I have 16 very large US companies ready to download and run it of Hopper class GPUs. All but two have staff on night watch to get it done. There is a hidden Anthropic Easter Egg on the site
@businessMoonshot AI is poised to make its Kimi K3 model available for public download, expanding its reach and influence in the global open software community at a time of growing US concern about Chinese encroachment into the top echelons of AI de
@nrehiew_Happy K3 weights and paper release day for all who celebrate
@jun_song8 hours left for Kimi-K3 weight release. Where could I get another 2TB of VRAM in 8 hours? All the assets I have left are just two kidneys
@tekniumK3 will be open sourced in 8 hours. Woot!
@kimi_moonshotReleasing the model weights and technical report of Kimi K3. Kimi K3 is our most capable model: a 2.8T MoE model with native visual understanding and a 1M-token context window. New model architecture: 2.5x the intelligence per unit of com
@wesrothKimi K3’s full model weights will be released by July 27, 2026. Architecture details, training methods, and evaluation results will follow in the technical report.
@rgb_lightsCareful with AI model performance claims at launch. First reports are usually wrong. “Kimi K3 performs significantly below the most recent frontier cyber-capable models on preliminary cyber evaluationsrun by UK AISI / CAISI.” https://t.c
@teortaxestexEuropean* excellence. Kimi K3 is live on eu-north1 at Nebius. And yes of course fp4. Same cost, 3-4 times faster. *formerly Yandex
@kimi_moonshotKimi K3 (open weights, coming soon)
@lentils80🚨 Kimi K3 is now finally open source and weights are out on Hugging Face!
@scaling01Kimi K3 is now officially open-weights
@basetenKimi K3 is now live on our Model APIs, day 0.
@basetenWe’re thrilled to be day 0 launch partners with the @Kimi_Moonshot team. Try it now:
@andrewcurran_K3 weights and technical report have been released.
@crystalsssupRT @Kimi_Moonshot: Releasing the model weights and technical report of Kimi K3. Kimi K3 is our most capable model: a 2.8T MoE model with n…
@victormustarRT @Kimi_Moonshot: Releasing the model weights and technical report of Kimi K3. Kimi K3 is our most capable model: a 2.8T MoE model with n…
@kimmonismusMoonshot delivered: model weights and technical report of K3 are now live!