Transparency

Sources

Every primary-source citation that backs a verified value on this site. 19 unique URLs are indexed below. Each entry records when it was last retrieved and a short note describing what was used.

This page is the audit trail. If a metric appears on a model or provider page, the source it came from is listed here — and conversely, if a metric is rendered as Data not yet verified., no citation exists for it yet. Pricing sources are classified as first-party pricing reference (the model creator's own pricing page) or hosted pricing reference (a hosting platform's page). Both are reference values, not live quotes. For per-attempt outcomes (including blocked retrievals), see /coverage. Each citation below pairs the retrieval date with a freshness chip; sources that have aged out of the standard window appear on the reverification queue for a manual re-check — they are never auto-fetched. For the methodology behind these citations, see /research/source-verification-methodology and the reference at /docs/data-verification.

Grouped

By source type

Distribution of indexed citations across the source-type allow-list.

Official vendor docs1
Official vendor pricing1
Official vendor site2
Regulatory filing0
Research paper0
Public dataset0
Unknown0

Status monitoring

3 vendor-reported status sources

Sources read by the Sprint 9 status observers in lib/observers/. Vendor-reported only — independent HTTP probes are not yet enabled.

Official siteRetrieved 2026-05-21Fresh
Anthropic — Status page
Anthropic's public status page (Statuspage-style). The machine-readable feed at /api/v2/status.json (redirects to status.claude.com) is consumed by the vendor-status observer at lib/observers/anthropic.ts. Vendor-reported; not an independent uptime monitor.
Official siteRetrieved 2026-05-21Fresh
Anthropic — API host root (independent probe target)
Probe target only — the bare api.anthropic.com host responds 404 to unauthenticated GETs at /, which tells us the host is reachable without invoking any inference endpoint. Hourly probe via /api/cron/status.
Official siteRetrieved 2026-05-21Fresh
Google Cloud — Incidents feed
Google Cloud's public incidents feed (JSON array of incident records). The vendor-status observer filters to incidents whose affected_products mention Gemini / Vertex AI / AI Studio. Vendor-reported; not an independent uptime monitor.

Anthropic

4 primary-source citations

Official docsRetrieved 2026-05-20Fresh
Anthropic — Models overview
Anthropic's models overview page (legacy section), including the Claude Opus 4 row.
Official pricingRetrieved 2026-05-20Fresh
Anthropic — Pricing
Anthropic's pricing reference (model pricing, prompt caching multipliers, batch API pricing).
Official siteRetrieved 2026-05-21Fresh
Anthropic — Status page
Anthropic's public status page (Statuspage-style). The machine-readable feed at /api/v2/status.json (redirects to status.claude.com) is consumed by the vendor-status observer at lib/observers/anthropic.ts. Vendor-reported; not an independent uptime monitor.
Official siteRetrieved 2026-05-21Fresh
Anthropic — API host root (independent probe target)
Probe target only — the bare api.anthropic.com host responds 404 to unauthenticated GETs at /, which tells us the host is reachable without invoking any inference endpoint. Hourly probe via /api/cron/status.