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OSS2026-06-09 · source-backed
The repo aggregates extracted system prompts attributed to Anthropic and OpenAI models. Popular raw material for prompt engineers studying production prompt structure, though provenance on any single entry is unverified. Useful as a study aid, not gospel. Read it to see how serious teams structure system prompts, not to copy claims you can't check.
Each link below shares sources, entities, or timing with this story.
Anthropic partners with OpenAI / Shared entities / Same source domain / Shared topic / What happened next / Tension
Linked by a graph relationship (Anthropic partners with OpenAI); both cover Anthropic, OpenAI; reported by the same outlet (github.com).
Anthropic partners with OpenAI / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Anthropic partners with OpenAI); both cover Anthropic, OpenAI; reported by the same outlet (github.com).
Anthropic partners with OpenAI / Shared entities / Shared topic / What happened next / Tension
Linked by a graph relationship (Anthropic partners with OpenAI); both cover Anthropic, OpenAI; overlapping topics (anthropic, model, openai).
OpenAI released Codex / Shared entities / Same source domain / Shared topic / What happened next
Linked by a graph relationship (OpenAI released Codex); both cover Anthropic, OpenAI; reported by the same outlet (github.com).
OpenAI released Frontier / Shared entities / Shared topic / What happened next
Linked by a graph relationship (OpenAI released Frontier); both cover Anthropic, OpenAI; overlapping topics (anthropic, model, openai, prompt).
Anthropic partners with OpenAI / Shared entities / Shared topic / Earlier coverage / Tension
Linked by a graph relationship (Anthropic partners with OpenAI); both cover Anthropic, OpenAI; overlapping topics (anthropic, model, openai).
OpenAI uses Claude Code / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (OpenAI uses Claude Code); both cover Anthropic, OpenAI; reported by the same outlet (github.com).
OpenAI uses Claude Code / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (OpenAI uses Claude Code); both cover Anthropic, OpenAI; overlapping topics (anthropic, model, prompt, structure).