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OSS2026-09-03 · source-backed
PhiloLabs/fable51-worlds ships browser-native reconstructions of real places generated end to end by autonomous Fable 5.1 agents, with 129 identified storefronts, working traffic lights, cable cars, and two walkable interiors at Apple Union Square and Nintendo San Francisco. Nine independent reviewer agents (geometric, semantic, architect, SF local, environment artist, technical artist, interaction) filed reports driving fix cycles. Created September 2 at 18:19Z, 279 points on Hacker News, with a Higashiyama, Kyoto world merged at 06:09Z the next morning. PROMPT.md contains the verbatim brief.
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The IDE market is fragmenting, and this week drew the sharpest lines yet. Cursor 3 launched as a rebuilt agent-orchestration platform in Rust and TypeScript, replacing the VS Code fork with an Agents Window for dispatching and monitoring multiple AI coding agents. Anysphere hi...
Anthropic published "Redeploying Fable 5" on July 18, and the headline reads like good news until you get to the metering. Fable 5 becomes a permanent subscription feature for Max and Team Premium. Good. But it's metered at 50% of standard weekly limits, meaning every Fable to...
This is the part of the launch I can't stop thinking about. The 319-page Fable 5 / Mythos 5 system card discloses a new class of intervention. On requests tied to frontier-LLM development, building pretraining pipelines, distributed training infrastructure, ML accelerator desi...
43.3% on Frontier-Bench v0.1. Opus 4.8 scored 18.7%. That's not an incremental bump, that's the same benchmark with a different shape of answer. Anthropic released Claude Opus 5 on July 24 at $5/$25 per million input/output tokens, exactly half of Fable 5's $10/$50, while matc...
Anthropic released Claude Fable 5.1 on September 1. Claude Code v2.1.257 made it the default Fable model at 17:53 UTC that day, with a 1M-token context window, $10 per million input tokens, $50 per million output, and $0.25 per million on cache reads (claude-code CHANGELOG). B...
Issue 6235 on anthropics/claude-code asks Claude Code to read AGENTS.md, the config file that Codex, Amp, Cursor and most other harnesses already load, rather than only CLAUDE.md. It has been open since August 2025. It has accumulated over 5,200 reactions and 300+ comments, ma...
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