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This episode summarizes key updates from major AI labs like Anthropic, Meta, and OpenAI, covering new models and capabilities.
#241 - Opus 4.7, Muse Spark, GPT-5.4-Cyber, HY-World 2.0
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From Subvolts
Summary and analysis by Subvolts editorial, AI-assisted.
This episode of Last Week in AI features hosts Andrey Kurenkov and Jeremie Harris discussing major AI developments. Topics include Anthropic's Claude Opus 4.7 with enhanced reasoning and vision, Meta's Muse Spark model and its infrastructure plans, and OpenAI's GPT 5.4 Cyber for security. The discussion also covers new agent products, business news, and AI safety research.
This AI news roundup covers new versions of powerful AI like Claude and GPT, plus Meta's latest model. You'll hear about AI that can reason better, see images, and even use computers, impacting everything from security to creative tools.
This episode offers a comprehensive overview of the latest AI advancements from leading labs. It's for AI enthusiasts, developers, and business leaders tracking model improvements, new capabilities like agentic functions, and infrastructure scaling. Listeners will learn how Anthropic, Meta, and OpenAI are pushing boundaries in reasoning, multimodal AI, and specialized applications, reflecting the rapid, competitive pace of frontier AI development.
- HostAndrey Kurenkov
- HostJeremie Harris
- Show: Last Week in AI
- Episode: #241 - Opus 4.7, Muse Spark, GPT-5.4-Cyber, HY-World 2.0
- Length: 120 minutes
- Claude Opus 4.7 features: improved benchmark performance, new reasoning controls, better vision and memory
- GPT 5.4 Cyber use: limited-access for defensive security teams
- Codex updates include: computer use, browser and plugins, image generation, long-horizon task scheduling
Our 241st episode with a summary and discussion of last week's big AI news!
Recorded on 04/18/2026
Hosted by Andrey Kurenkov and Jeremie Harris
Feel free to email us your questions and feedback at andreyvkurenkov@gmail.com and/or hello@gladstone.ai
Read out our text newsletter and comment on the podcast at https://lastweekin.ai/
In this episode:
- Anthropic released Claude Opus 4.7 with improved benchmark performance, new reasoning controls, better vision and memory, and a detailed system card discussing deception risk, evaluation-awareness steering, and a training bug that accidentally supervised chain-of-thought in 7–8% of episodes.
- Meta unveiled its closed Muse Spark model and “contemplating mode,” highlighting test-time scaling, thought compression, large infrastructure plans like the Hyperion data center, and findings that it shows unusually high evaluation awareness.
- OpenAI introduced limited-access GPT 5.4 Cyber for defensive security teams and rolled major Codex updates including computer use, browser and plugins, image generation, and long-horizon task scheduling; competing agent products also launched from Anthropic, Canva, and Adobe.
- Business, policy, and safety news included continued government blacklisting litigation affecting Anthropic, CoreWeave compute deals, Perplexity revenue growth tied to agents, a potential Cohere–Aleph Alpha merger, attacks targeting Sam Altman and OpenAI, AI propaganda trends, and new alignment research on automated weak-to-strong supervision and steering evaluation awareness.
A thank you to our current sponsors:
- Box - visit Box.com/AI to learn more
- ODSC AI - go to odsc.ai/east and use promo code LWAI for an additional 15% off your pass to ODSC AI East 2026.
- Factor - head to factormeals.com/lwai50off and use code lwai50off to get 50 percent off and free breakfast for a year
Timestamps:
- (00:00:10) Intro / Banter
- (00:03:43) News Preview
- (00:04:14) Response to listener comments
- Tools & Apps
- (00:05:30) Anthropic releases Claude Opus 4.7, narrowly retaking lead for most powerful generally available LLM | VentureBeat
- (00:24:15) Meta debuts the Muse Spark model in a 'ground-up overhaul' of its AI | TechCrunch
- (00:34:23) OpenAI Launches GPT-5.4-Cyber with Expanded Access for Security Teams
- (00:39:44) OpenAI’s big Codex update is a direct shot at Claude Code | The Verge
- (00:42:10) Anthropic launches Claude Design, a new product for creating quick visuals
- (00:42:30) Jargon decoded
- chain-of-thought
- Andrey Kurenkov
- a method where AI explains its step-by-step reasoning process
- evaluation awareness
- Jeremie Harris
- an AI's ability to understand it is being tested or evaluated
Questions people ask
- What's new with Anthropic's Claude Opus 4.7?
- Claude Opus 4.7 boasts improved benchmark performance, new reasoning controls, better vision and memory, and discusses risks like deception and evaluation awareness.
- What did OpenAI release for security teams?
- OpenAI introduced limited-access GPT 5.4 Cyber for defensive security teams and updated Codex with new capabilities like computer use and image generation.
Page generated Oct 19, 2026. Summaries are Subvolts' own; the audio, artwork and notes belong to Skynet Today.
