---
title: llm-anthropic 0.27
link: https://simonwillison.net/2026/Aug/24/llm-anthropic/
source: simon-willison
published: 2026-08-24T16:27:04Z
updated: 2026-08-24T16:27:04Z
first_seen: 2026-09-02T14:07:29.769486161Z
tags:
- python
- httpx
- llm
- anthropic
- claude
summary: 'Release: llm-anthropic 0.27 This release of the Anthropic plugin for LLM mainly provides compatibility with the recently released anthropic v1.0.0 Python library, which switches from httpx to httpx2. OpenAI made the same change in their v3.0.0 release two weeks ago. Anthropic provide this migration guide for upgrading to 1.0, so I prompted Fable 5 in Claude Code with: Upgrade to anthropic>=1 - read https://raw.githubusercontent.com/anthropics/anthropic-sdk-python/refs/heads/main/MIGRATION.md and get the tests passing Here''s the resulting PR. Tags: python, httpx, llm, anthropic, claude'
content: feed
html: 2026-08-24-llm-anthropic-0-27.html
---

**Release:** [llm-anthropic 0.27](https://github.com/simonw/llm-anthropic/releases/tag/0.27)

This release of the Anthropic plugin for [LLM](https://llm.datasette.io/) mainly provides compatibility with the recently released [anthropic v1.0.0](https://github.com/anthropics/anthropic-sdk-python/releases/tag/v1.0.0) Python library, which switches from `httpx` to [httpx2](https://github.com/pydantic/httpx2). OpenAI made the same change in their [v3.0.0 release](https://github.com/openai/openai-python/releases/tag/v3.0.0) two weeks ago.

Anthropic provide this [migration guide](https://github.com/anthropics/anthropic-sdk-python/blob/v1.0.0/MIGRATION.md) for upgrading to 1.0, so I prompted Fable 5 in Claude Code with:

> `Upgrade to anthropic>=1 - read https://raw.githubusercontent.com/anthropics/anthropic-sdk-python/refs/heads/main/MIGRATION.md and get the tests passing`

Here's [the resulting PR](https://github.com/simonw/llm-anthropic/pull/84).

Tags: [python](https://simonwillison.net/tags/python), [httpx](https://simonwillison.net/tags/httpx), [llm](https://simonwillison.net/tags/llm), [anthropic](https://simonwillison.net/tags/anthropic), [claude](https://simonwillison.net/tags/claude)