Claude Fable 5.2 Cracks Black Hole Physics, Meta Releases Muse Ember & Unreal 5.9 Adds AI Agents

Today's AI news: Anthropic releases Claude Fable 5.2 and Mythos 5.2, the same model with Mythos limited to vetted security and biomedical teams. In testing it designed three working electronic devices from a one-paragraph prompt and finished a black hole calculation stuck since 2003, and long-time subscribers get extra Fable resets. Meta releases Muse Ember, its smallest and cheapest Muse model, built for agent work, with a 1M-token context window. ByteDance's Seedream 5.5 keeps images consistent over up to 100 rounds of edits and outputs transparent images. Epic's Unreal Engine 5.9 preview was built mainly by AI agents and adds an in-editor assistant for Claude Code, Codex, Cursor and OpenCode. And Tesla Optimus engineer Amir Hadi shows off GROXIE, a desk robot concept meant to run on Grok. Chapters: 0:00 Today's AI News 0:30 Claude Fable 5.2 1:19 Muse Ember 2:02 Seedream 5.5 2:38 Unreal Engine 5.9 3:20 GROXIE Desk Robot Blend Roundup 2026-11-10 https://x.com/claudeai/status/2119867114450268322 https://x.com/AIatMeta/status/2119853591703998787 https://x.com/ByteDanceSeed_/status/2119720475068920181 https://x.com/UnrealEngine/status/2119806791567773829 https://x.com/AmirHadiEng/status/2119556132632948890 Anthropic releases Claude Fable 5.2, which has already solved two open problems in black hole physics. Meta's Muse Ember is its smallest and cheapest model yet. ByteDance's Seedream 5.5 can edit one image a hundred times without falling apart. Unreal Engine 5.9 puts AI agents inside the editor. And a Tesla engineer shows off a little robot for your kitchen counter. Here's today's AI news. Anthropic has released Claude Fable 5.2, alongside Mythos 5.2. They're the same model, but Mythos only goes to vetted security and biomedical teams. Fable is out now for everyone, in the Claude apps, Claude Code and the API, at eight dollars per million input tokens. It beats Fable 5.1 and Opus 5.5 on most coding and reasoning tests, though not all of them. In testing, it designed three working gadgets from a one-paragraph prompt, including a voice assistant hub and circuit boards. It also finished a black hole calculation that had been stuck since 2003. So this does appear to be the most capable model ever, and Anthropic is giving away resets so you can get the most out of it - the longer you've been subscribed, the more you get. Meta has released Muse Ember, the smallest model in its Muse family. It's built for the repetitive work agents do all day: calling tools, small coding fixes, routing, and pulling information out of long documents. It has a one-million-token context window and understands text, images, audio and video. On Meta's own charts it beats Claude Haiku 5.5 and GPT-6 Luna on most agent and coding tests, though Haiku still wins on one tough coding benchmark. It costs ten cents per million input tokens. It's available now on the Meta Model API and in Muse Code, but no word on open weights yet. ByteDance has introduced Seedream 5.5, the latest version of its image model. The big claim is editing. You can keep refining an image for up to a hundred rounds, and it leaves the parts you didn't touch alone, pixel for pixel. It can also make transparent images, ready to drop straight into other designs, and ByteDance says lighting, skin and small text all look more natural. It's coming to Dreamina, CapCut and BytePlus. There's no official price yet, and it hasn't reached the public leaderboards, so for now we only have ByteDance's word on how it compares. Epic has released a preview of Unreal Engine 5.9, and it's the first version built mainly by AI agents. A small team directed them, while engineers reviewed and tested the work. The preview adds an assistant panel inside the editor that works with Claude Code, Codex, Cursor or OpenCode. Agents get new tools to build levels, test gameplay and even pull assets from the Fab store. There's an AI tool for concept art and 3D models, and games can now run in a web browser. It's all experimental and labelled unstable, ready for Epic's AI MegaJam, which runs from November twelfth to fifteenth. Amir Hadi, a robotics engineer on Tesla's Optimus team, has shown off GROXIE, a small AI companion robot for a kitchen counter or desk. He says the idea came from his wife, who tested it while cooking, asking for meal ideas, recipes, and help with her calendar and emails. The plan is for Grok to do the talking. But this is a side project, not a Tesla product. It still has to pass a formal prototype review before anyone decides whether it goes any further. So if you've been wanting a robot to watch you cook, you'll have to wait.