Anthropic Publishes System Prompts for Claude Models with Release Notes
Saboo_Shubham_ · x · 2026-08-17
Anthropic now publicly releases system prompts for Claude Fable 5, Opus 5, and other models, with dated release notes showing additions and removals in production prompts.
More from Models
- Grok praised for first-principles analysis of Wright Brothers posts — doodlestein · 2026-08-17
- Qwen 3.8-27B Long Thinking Test: Fails to Finish Planning After 50k Tokens — LippyBumblebutt · 2026-08-17
- Grok 4.6 Coding Test: Strong Core Logic, Weak Boundary Handling — jquinonero · 2026-08-17
- Opus Frequent Errors and Over-Apologetic Behavior — nathanbenaich · 2026-08-17
- Anthropic's Internal "Model 2" Leaked, Outperforms Mythos 5 — koltregaskes · 2026-08-17
- Why run multiple models: The whole is greater than the sum of its parts — cantrell · 2026-08-17