Official prompt history
Claude system prompt
This historical snapshot maps the November 24, 2025 Claude Opus 4.5 product-information posture for comparison with Anthropic's January update.
Publication context
Read the provenance first
The official prompt is publicly viewable; this historical route publishes original normalization rather than the full prompt.
- Source tier
- Tier A · vendor-published
- Confidence
- high
- Published
- Nov 24, 2025
- Completeness
- partial
- Checksum
- sha256:d9647e82281af…
- Raw artifact
- No prompt artifact available
The reader presents source-led semantic normalization; the selected January record also includes one short official excerpt. It does not mirror the full Anthropic publication.
Product information boundary
Editorial normalization: The published prompt identifies Claude Opus 4.5 and maps access through Claude chat surfaces, the developer platform, and Claude Code.
Reading note. This is a compact semantic map of the official November entry, not a raw prompt transcription.
Knowledge and support routing
Editorial normalization: Product and API questions outside the supplied information are routed toward Anthropic support and developer documentation.
Reading note. The prompt constrains product-support answers rather than presenting the assistant as live product documentation.
Response conventions
Source-led map: The official publication describes prompt-level response shaping, including current-date context and formatting expectations.
Reading note. This section records the function of the published system prompt without reproducing its full text.
Evidence and provenance
Tier A · vendor-published: Anthropic system-prompt release publication — Vendor-published prompt material supports a Tier A record; full-text republication is intentionally avoided.
Snapshot evidence
What this snapshot includes and leaves out.
- Product surface
- claude.ai and Claude apps
- Model context
- Claude Opus 4.5This record selects the model's two official dated entries to demonstrate compatible version history; it is not a claim about every Claude model.
- Checksum scope
- Three-section editorial normalization of the official dated entry; UTF-8, LF line endings.
- Raw mode
- Use Anthropic's official dated publication for the full text. Promptcred retains limited excerpts, normalization, checksums, and change interpretation.