GPT-5.6 Sol High was able to follow Fable's plan and produce a great version too. First stab was 30% slower, but one follow-up prompt got it to parity. Per-token cost: $43. In contrast, DeepSeek V4 Flash couldn't get anything working despite many follow-up prompts. Frontier! https://x.com/dhh/status/208678340144548…

DHH@dhhAug 9

Fable one-shotted a Rust rewrite of the TerminalTextEffects Python library in 11M tokens. Startup time went from 87ms to 2ms and rendering speed is up by 9.6x. Now zero dependencies and a 3mb single exec 🤯 https://claude.ai/code/artifact/287825bc-7aad-4541-a7e7-fa4ba8d03612