# Pi v0.82.1: Claude Opus 5 support, Anthropic bearer auth, faster model catalogs

> Claude Opus 5 is now available on Pi through Anthropic and Amazon Bedrock with adaptive thinking (including xhigh), inference profiles, and prompt caching. New `ANTHROPIC_AUTH_TOKEN` environment variable provides bearer authentication for Anthropic-compatible gateways. pi.dev model catalogs now use `If-None-Match` revalidation, returning 304 on unchanged catalogs instead of a full download. The `outputPad` setting is exposed to custom message renderers. Several bug fixes for compaction, branch summaries, unavailable scoped models, and startup context file discovery.

| | |
|---|---|
| **Tool** | Pi |
| **Version** | v0.82.1 |
| **Kind** | release |
| **Published** | 2026-07-25 |
| **Observed** | 2026-08-21 |
| **Significance** | 4/5 |
| **Breaking** | no |
| **Categories** | feature, model-support, new-model |

## What changed


- Claude Opus 5 support on Anthropic and Amazon Bedrock with adaptive thinking (including `xhigh`), inference profiles, and prompt caching
- `ANTHROPIC_AUTH_TOKEN` for bearer authentication against Anthropic-compatible gateways, including compaction and branch summaries
- pi.dev model catalog refreshes now use `If-None-Match` so unchanged provider catalogs return 304 instead of a full download
- `outputPad` setting exposed to custom message renderers
- Inherited `ANTHROPIC_AUTH_TOKEN` bearer authentication for Anthropic-compatible gateways
- Radius OAuth device authorization, token exchange, and refresh requests use the configured gateway directly
- Model loading errors now append the underlying cause
- Fixed compaction and branch summaries for providers whose authentication resolves entirely to request headers
- Fixed unavailable scoped models being hidden from `/models`
- Fixed startup context file discovery skipping directories that match context file names (e.g. `AGENTS.md`)
- Fixed llama.cpp extension to persist its model catalog so models stay listed before the first successful refresh


## Sources

- [github_release](https://github.com/earendil-works/pi/releases/tag/v0.82.1) — retrieved 2026-08-21


## Community

_No curated reactions recorded. Facts and community takes are kept in separate layers
and never blended._

---
Canonical: https://changelogs.info/pi/v0-82-1
Entity: https://changelogs.info/pi
Event ID: `evt_2026-07-25_pi_v0-82-1`
Licence: event synthesis © changelogs.info, CC BY 4.0. Linked sources belong to their vendors.