# #244 - GPT-5.5 Instant, Grok 4.3, OpenAI vs Musk

Page: https://stenobird.com/podcast/last-week-in-ai/244-gpt-5-5-instant-grok-4-3-openai-vs-musk
Text version: https://stenobird.com/podcast/last-week-in-ai/244-gpt-5-5-instant-grok-4-3-openai-vs-musk.md
Podcast: [Last Week in AI](https://stenobird.com/podcast/last-week-in-ai)
Published: 2026-05-11T06:00:00+00:00
Episode link: https://rss.art19.com/episodes/b3b015d7-ef36-4285-88fb-c4242b748245.mp3?rss_browser=BAhJIg90cmFuc2NyaWJyBjoGRVQ%3D--952c5701c84ad333c69d5faa668f8177091704f0
Audio file: https://rss.art19.com/episodes/b3b015d7-ef36-4285-88fb-c4242b748245.mp3?rss_browser=BAhJIg90cmFuc2NyaWJyBjoGRVQ%3D--952c5701c84ad333c69d5faa668f8177091704f0
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JSON: https://stenobird.com/v1/public/podcasts/last-week-in-ai/episodes/244-gpt-5-5-instant-grok-4-3-openai-vs-musk
Duration seconds: 6916

## Resource

Our 244th episode with a summary and discussion of last week's big AI news! Recorded on 05/08/2026 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: OpenAI released GPT-5.5 Instant as ChatGPT’s new default model, showing large benchmark gains and crossing a “high” cyber-risk threshold under its preparedness framework, while bio-safety results were mixed. OpenAI investigated and patched ChatGPT’s “goblin” obsession, attributing it to reinforcement-learning rewards that over-amplified playful creature metaphors in a nerdy persona that later bled across versions. Major industry moves included xAI’s Grok 4.3 price cuts and voice tools, Mistral’s unified Medium 3.5 model and Work mode, and Anthropic’s managed-agent upgrades alongside a surprise SpaceX compute deal and reports of a much higher Anthropic valuation. Key policy and security developments covered the Musk–OpenAI trial details, Pentagon AI deployments on classified networks, expanded U.S. government pre-release model reviews, and reports of NSA testing Anthropic’s Mythos on Microsoft software. Timestamps: (00:00:10) Intro / Banter (00:01:14) News Preview (00:04:39) Response to listener comments Tools & Apps (00:13:40) OpenAI releases GPT-5.5 Instant, a new default model for ChatGPT | TechCrunch (00:18:23) ChatGPT Became So Obsessed With Goblins That OpenAI Had to Intervene (00:27:14) xAI launches Grok 4.3 at an aggressively low price and a new, fast, powerful voice cloning suite | VentureBeat (00:33:49) Mistral's new flagship Medium 3.5 folds chat, reasoning, and code into one model (00:39:28) Anthropic updat…

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