Opus 5.5 Is Routing to a Secret Model! (Might Be Fable 5.5!?)
People say that when they pick Opus 5.5 in Claude, some requests are going to a newer, unreleased model. Is this Fable 5.5, or Opus 6? I go through the demos people are posting (a PS5 controller drawn entirely in code, an animation where every frame is JavaScript), the catch most people missed, three things you can build with Opus 5.5 right now (one with a free skill), and this week's wildest rumors: Google's secret Gemini 4 "Carbon", AI that improves itself, and OpenAI's Bel. Nothing here is confirmed by Anthropic yet, and I'll tell you exactly what is and isn't proven. 🔔 SUBSCRIBE TO BYTEFORWARD AI news, coding agents, model comparisons, benchmarks, and the things people are actually building: https://www.youtube.com/channel/UCGGHPOAzUaKsSc2yjsOeAFQ?sub_confirmation=1 Chapters 0:00 Is Anthropic secretly testing Fable 5.5? 1:03 The demos people are posting 2:26 The catch 3:27 What you can build with Opus 5.5 right now 3:39 A whole A380 in SVG (free Anatomy skill) 4:14 Anthropic City in three.js 4:31 An Airbnb turned into a 3D world 4:51 Google's secret Gemini 4 "Carbon" 5:31 Recursive self-improvement? 5:48 The Bel rumor 6:30 My two cents The free skill from the video Anatomy, a Claude Code skill (MIT): https://github.com/wheresryan22/anatomy Website: https://skills.wheresryan.sh/anatomy Sources Anthropic: why Claude switched models (Opus 5 / Opus 5.5): https://support.claude.com/en/articles/16049681-why-claude-switched-models-in-your-conversation-with-opus-5-or-opus-5-5 "Opus 5.5 is routing to a new model" + The Life of a Human: https://x.com/chetaslua/status/2109244702235275680 The Claude Code test: https://x.com/chetaslua/status/2109290983896818132 One-shot PS5 controller SVG: https://x.com/marmaduke091/status/2109027195356336534 Another one-shot SVG: https://x.com/marmaduke091/status/2109037765488709762 Same prompt, four models: https://x.com/marcthecreatorr/status/2109233655792996591 "SVGs are solved": https://x.com/TokenGremlin/status/2109041454152634736 Don't use these SVG tests: https://x.com/HarshithLucky3/status/2109050605952254349 The A380 SVG: https://x.com/chazza/status/2108865799674876154 Anthropic City: https://x.com/maxt3chno/status/2109284129074192407 Airbnb to Blender + Unreal Engine 5: https://x.com/SimbasJungles/status/2109095401273938072 Business Insider on Gemini 4 Carbon: https://www.businessinsider.com/google-employees-test-new-gemini-4-model-argon-barium-carbon-2026-10 Carbon posts: https://x.com/AndrewCurran_/status/2108651657915732034 · https://x.com/LuminaBench/status/2108653789591003585 "Have you heard of recursive self improvement": https://x.com/vedantmisra/status/2108660499026264285 RSI loops post: https://x.com/kimmonismus/status/2108954632714170803 The rumor post: https://x.com/imjustnewatai/status/2108662320708698289 Gemini 4 Argon controller SVGs: https://x.com/Soso_fun_yt/status/2106413971347747205 BMW M4 SVG: https://x.com/HarshithLucky3/status/2104971369763176803 Claude Managed Agents (footage): https://x.com/ClaudeDevs/status/2108591328732856655 Claude Code Projects (footage): https://x.com/ClaudeDevs/status/2108621476538781878 More on Bel: Everything We Know About OpenAI GPT 7 "Bel": https://www.youtube.com/watch?v=0QzQftEbHS4 #Claude #Anthropic #AINews
