[![AI Newsletter](https://substackcdn.com/image/fetch/$s_!m7md!,w_40,h_40,c_fill,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F41327c80-fe59-416d-aa6f-ab6874177ac7_517x517.png)](https://nlp.elvissaravia.com/)
# [AI Newsletter](https://nlp.elvissaravia.com/)
SubscribeSign in
# 🤖 AI Agents Weekly: Kimi K3, Thinking Machines Inkling, Agentic Misalignment, Perplexity SPACE, Sunday ACT-2, GPT-Red, and More
### Kimi K3, Thinking Machines Inkling, Agentic Misalignment, Perplexity SPACE, Sunday ACT-2, GPT-Red, and More
[![elvis's avatar](https://substackcdn.com/image/fetch/$s_!FpVH!,w_36,h_36,c_fill,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fbucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com%2Fpublic%2Fimages%2F1fe050d4-ef83-4851-b95e-ff364a3d72c7_512x512.jpeg)](https://substack.com/@elvissaravia)
[elvis](https://substack.com/@elvissaravia)
Jul 18, 2026
∙ Paid
26
Share
In today's issue:
  * Moonshot open-sources Kimi K3
  * Thinking Machines ships Inkling weights
  * Anthropic finds new agent misalignment
  * Perplexity opens SPACE agent runtime
  * Sunday Robotics unveils ACT-2
  * OpenAI launches GPT-Red red teamer
  * Meituan open-sources LongCat-2.0
  * schema harness saturates ARC-AGI-3


And all the top AI dev news, papers, and tools.
* * *
* * *
## Top Stories
### Moonshot Open-Sources Kimi K3
[![Kimi K3: Open Frontier Intelligence](https://substackcdn.com/image/fetch/$s_!FUuk!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F2e3176eb-1a6e-4865-bd77-9c8e9c25d877_1200x675.png)](https://substackcdn.com/image/fetch/$s_!FUuk!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F2e3176eb-1a6e-4865-bd77-9c8e9c25d877_1200x675.png)
Moonshot AI introduced Kimi K3, billed as the first open 3-trillion-class model, with weights due July 27.
  * **Scale and architecture:** A 2.8T-parameter Stable LatentMoE activating 16 of 896 experts, with a 1M-token context window and native vision in a single model.
  * **New attention design:** Kimi Delta Attention delivers up to 6.3x faster decoding in million-token contexts, and Attention Residuals add roughly 25% higher training efficiency at under 2% extra compute.
  * **Agentic strength:** Leads Terminal-Bench 2.1 and scores 67.3 on DeepSWE, with demos of autonomous kernel optimization, compiler development, and vision-in-the-loop coding.
  * **Availability:** Live via Kimi.com, Kimi Code, and API from about 0.30 dollars to 15 dollars per million tokens, with open weights following on July 27.


**[Blog](https://www.kimi.com/blog/kimi-k3)**
* * *
## This post is for paid subscribers
[Subscribe](https://nlp.elvissaravia.com/subscribe?simple=true&next=https%3A%2F%2Fnlp.elvissaravia.com%2Fp%2Fai-agents-weekly-kimi-k3-thinking&utm_source=paywall&utm_medium=web&utm_content=207491232)
[Already a paid subscriber? **Sign in**](https://substack.com/sign-in?redirect=%2Fp%2Fai-agents-weekly-kimi-k3-thinking&for_pub=nlpnews&change_user=false)
© 2026 elvis · [Privacy](https://substack.com/privacy) ∙ [Terms](https://substack.com/tos) ∙ [Collection notice](https://substack.com/ccpa#personal-data-collected)
[ Start your Substack](https://substack.com/signup?utm_source=substack&utm_medium=web&utm_content=footer)[Get the app](https://substack.com/app/app-store-redirect?utm_campaign=app-marketing&utm_content=web-footer-button)
[Substack](https://substack.com) is the home for great culture