# Provider: anthropic - **TrackLLM** — machine-readable twin of [providers/anthropic.html](https://www.trackllm.net/providers/anthropic.html). Every page on the site has a `.md` sibling at the same path; links below point at those. - **Atom feed** of this page's detected changes: [feeds/providers/anthropic.xml](https://www.trackllm.net/feeds/providers/anthropic.xml) - **JSON** this page is rendered from: [data/providers/anthropic.json](https://www.trackllm.net/data/providers/anthropic.json) (provider JSON) - **Raw data** (every collected response): https://github.com/timothee-chauvin/trackllm_data · Built 2026-10-15 18:26 UTC [Home](https://www.trackllm.net/index.md) / anthropic 2 endpoints across 2 models and 1 serving variant, monitored since 2026-01-15. 1 change detected across 1 endpoint. ## Drift rate Detected changes per endpoint-year of monitoring, with a 95% Poisson interval. A rate is withheld below 0.5 endpoint-years of exposure. | Method | Endpoints | Endpoint-years | Changes | Rate (/endpoint-year) | 95% interval | | --- | --- | --- | --- | --- | --- | | LT | 0 | 0.0 | 0 | — | — | | B3IT | 2 | 1.36 | 1 | 0.73 | 0.00–2.17 | ## Drift by model Every endpoint anthropic serves. Each endpoint's full drift series and detected changes are in the JSON above. ## Monitoring & changes over time Endpoints under monitoring each month (the exposure the rate divides by) are in the JSON above under `months` and `variants[].monitoring`. ## Serving variants A provider's quantizations are separate serving stacks and drift separately. | Variant | Endpoints | LT rate | LT 95% interval | LT changes | B3IT endpoints | B3IT changes | | --- | --- | --- | --- | --- | --- | --- | | — | 2 | — | — | 0 | 2 | 1 | ## Endpoints | Model | Variant | Org | Status | Changes | Methods | Last change | | --- | --- | --- | --- | --- | --- | --- | | [claude-haiku-4.5](https://www.trackllm.net/endpoints/anthropic2fclaude-haiku-4.523anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | retired | 1 | `B3IT` | 2026-02-25 | | [claude-sonnet-4.5](https://www.trackllm.net/endpoints/anthropic2fclaude-sonnet-4.523anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | tracked | 0 | `B3IT` | — | | [claude-fable-5.1](https://www.trackllm.net/endpoints/anthropic2fclaude-fable-5.123anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-fable-5.1:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-fable-5.13abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-fable-5](https://www.trackllm.net/endpoints/anthropic2fclaude-fable-523anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-fable-5:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-fable-53abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-haiku-4.5:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-haiku-4.53abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-haiku-5.5](https://www.trackllm.net/endpoints/anthropic2fclaude-haiku-5.523anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-haiku-5.5:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-haiku-5.53abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-4.1:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-4.13abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-4.5](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-4.523anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | not selected | 0 | — | — | | [claude-opus-4.5:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-4.53abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-4.6](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-4.623anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | not selected | 0 | — | — | | [claude-opus-4.6:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-4.63abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-4.7](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-4.723anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-4.7:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-4.73abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-4.8](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-4.823anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-4.8](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-4.823anthropic2ffast.md) | [anthropic/fast](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-4.8:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-4.83abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-5.5](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-5.523anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-5.5](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-5.523anthropic2ffast.md) | [anthropic/fast](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-5.5:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-5.53abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-5](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-523anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-5](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-523anthropic2ffast.md) | [anthropic/fast](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-opus-5:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-opus-53abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-sonnet-4.5:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-sonnet-4.53abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-sonnet-4.6](https://www.trackllm.net/endpoints/anthropic2fclaude-sonnet-4.623anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | not selected | 0 | — | — | | [claude-sonnet-4.6:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-sonnet-4.63abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-sonnet-5.5](https://www.trackllm.net/endpoints/anthropic2fclaude-sonnet-5.523anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-sonnet-5.5:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-sonnet-5.53abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-sonnet-5](https://www.trackllm.net/endpoints/anthropic2fclaude-sonnet-523anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | | [claude-sonnet-5:batch](https://www.trackllm.net/endpoints/anthropic2fclaude-sonnet-53abatch23anthropic.md) | [anthropic](https://www.trackllm.net/providers/anthropic.md) | [anthropic](https://www.trackllm.net/orgs/anthropic.md) | untrackable | 0 | — | — | ## Detected changes | Date | Endpoint | Method | Magnitude | Description | | --- | --- | --- | --- | --- | | 2026-02-25 | [claude-haiku-4.5 @ anthropic](https://www.trackllm.net/endpoints/anthropic2fclaude-haiku-4.523anthropic.md) | B3IT | TV 0.21 | Probe-prompt outputs shifted (total variation 0.21) | --- Data collected via the OpenRouter API. [Home](https://www.trackllm.net/index.md) · [Changes](https://www.trackllm.net/changes.md) · [Providers](https://www.trackllm.net/providers.md) · [Endpoints](https://www.trackllm.net/endpoints.md) · [Methodology](https://www.trackllm.net/methodology.md) · [About](https://www.trackllm.net/about.md) · [GitHub](https://www.trackllm.net/github.md)