Published product instructions
DocumentedAnthropic publishes dated system-prompt entries for claude.ai and mobile surfaces.
View prompt evidenceAgent intelligence
Claude
Anthropic publishes dated system-prompt history for claude.ai and Claude mobile apps, separate from Claude API behavior.
The selected evidence covers Claude's claude.ai and mobile product-prompt history, not Claude API behavior. Official dated entries establish product context, knowledge boundaries, and response conventions; they do not establish a complete tool inventory or memory implementation.
Scope: claude.ai and Claude apps · Claude Opus 4.5 · reviewed Aug 11, 2026
Reviewed product surfaces
Product Surface Schematic
Each layer links to the detailed evidence map. Its state applies only to the reviewed evidence.
Reviewed surface claude.ai and Claude apps
- Core product promptDocumented
- Current product contextDocumented
- Claude API instructionsOut of scope
- Product toolsNot established
- Product memoryNot established
- Documented
- Out of scope
- Not established
Source-backed answers
Key behaviors
Each answer is scoped to the selected evidence. “Not established” means the evidence does not support the claim; it does not assert absence.
Current product context
DocumentedThe official page says prompt context supplies current information such as the date.
View prompt evidenceClaude API scope
Out of scopeAnthropic explicitly says these product prompt updates do not apply to the Claude API.
Review evidence scopeTools
Not establishedThis limited package does not assert a complete tool inventory.
Review evidence scopeMemory / persistent guidance
Not establishedThe selected official prompt entries do not establish the full memory implementation.
Review evidence scopeEditorial guidance
What this means in practice
These conservative editorial implications come from the linked evidence. They add no vendor claims or generic prompt advice.
Editorial implication
Keep product and API assumptions separate.
These dated prompt records apply to Claude product surfaces and explicitly do not establish Claude API instructions.
Supporting evidenceEditorial implication
Treat the documented behavior as versioned product context.
Anthropic publishes dated entries, so conclusions should remain attached to the covered prompt date rather than generalized to every current Claude surface.
Supporting evidenceEditorial implication
Do not infer a complete tool or memory model.
The selected prompt entries are useful for product context and response boundaries, but they do not establish the full tool inventory or memory implementation.
Supporting evidenceUseful next actions
Continue your research
Compare agent behaviorsReview the same evidence-backed questions across all six products.
Inspect instruction evidenceOfficial dated publications support a selected instruction map, an immutable historical map, and a human-reviewed semantic diff.
What changed between the two selected versions?Inspect the source-backed semantic diff between the selected dates.
How is Claude Code instructed differently?Compare Claude chat-product prompts with Claude Code's coding-agent instruction stack.
Review source and provenance detailsVerify origin, retrieval, completeness, publication limits, and rights.
Product scope
Claude product prompts and Claude API behavior are different scopes.
- Organization
- Anthropic
- Product
- Web, desktop, and mobile AI assistant
- Surface
- claude.ai and Claude appsAnthropic's published system-prompt history applies to claude.ai and the Claude mobile apps, not the API.
- 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.
Evidence status
Coverage and review
Anthropic publishes dated prompts for claude.ai and mobile apps and explicitly excludes the API. This review maps two compatible Opus 4.5 entries without bulk-republishing them.
- Coverage
- partial
- Primary source
- Tier A · vendor-published
- Review freshness
- datedCoverage spans two selected compatible Opus 4.5 entries; the latest Claude product instruction state is not established.
- Reviewed
- Aug 11, 2026
Detailed instruction layers
Instruction-system map
The instruction map covers product context, bounded support knowledge, response conventions, and the limits of the selected prompt evidence.
Core product promptdocumented
Anthropic publishes dated system-prompt entries for claude.ai and mobile surfaces.
EvidenceCurrent product contextdocumented
The official page says prompt context supplies current information such as the date.
EvidenceClaude API instructionsout of scope
Anthropic explicitly says these product prompt updates do not apply to the Claude API.
Source detailProduct toolsnot established
This limited package does not assert a complete tool inventory.
Source detailProduct memorynot established
The selected official prompt entries do not establish the full memory implementation.
Source detailSupporting instruction evidence
Prompt and snapshot evidence
Official dated publications support a selected instruction map, an immutable historical map, and a human-reviewed semantic diff.
Inspect instruction evidence- Selected snapshot
- Claude Opus 4.5 · January 18, 2026
- Evidence coverage
- Through Jan 18, 2026Claude Opus 4.5 · January 18, 2026
- Latest known vendor version
- Not established by selected evidence
- Current product state
- Not established by selected evidence
- Publication
- Limited excerpt and analysis
- Instruction page
- Available and indexableOfficial vendor-published dated prompt history with limited reproduction and unique version analysis.
Evidence-backed capabilities
Capabilities with evidence
Each capability links to its supporting instruction section and keeps its stated confidence level.
| Capability | What the source establishes | Confidence | Evidence |
|---|---|---|---|
| Official dated prompt history | Anthropic publishes dated entries and highlights changes between compatible versions. | high | Section |
| Product context | The selected entries provide product and access-channel context for Claude. | high | Section |
| Support and documentation routing | The prompt directs unsupported product and API questions toward official resources. | high | Section |
Version evidence
Snapshots and meaningful changes
The selected Opus 4.5 entries form a documented sequence: November 24, 2025 precedes January 18, 2026.
- historical Claude Opus 4.5 · November 24, 2025Nov 24, 2025Historical evidence
- selected Claude Opus 4.5 · January 18, 2026Jan 18, 2026Instruction evidence
Provenance
Source ledger
Every source lists its origin, retrieval date, completeness, publication limits, and rights separately.
Tier A · vendor-published
Anthropic system-prompt release publication
- Publisher
- Anthropic
- Retrieved
- Aug 11, 2026
- Upstream ref
- Claude Opus 4.5 · 2025-11-24 and 2026-01-18 entries
- Rights posture
- Official public prompt publication; limited excerpt and original analysis only.
Promptcred does not reproduce the complete official prompts. It maps selected sections and change meaning.
Open primary source