anthropic-sdk-python v0.121.0 repo
Anthropic Python SDK v0.121.0 released 2026-08-07. Adds session budgets, advisor tool, pinned inference location, and skills auto-loading from GitHub. Removes retired Claude Opus 4.1 models.
What it does for you: Skills auto-loading from GitHub means Hermes can pull the latest versions from axion-skills without manual re-installation — the sync gap between the canonical Skills folder and running sessions closes automatically. Session budgets let you cap token spend per unattended night-shift run before they become expensive. The mid-conversation-tool-changes-2026-07-01 beta unlocks dynamic tool injection mid-session, which is exactly what the Hermes approval flow needs.
In practice: Same pip install, immediate gains. The skills auto-loading alone makes this the most impactful SDK drop since the tool-use beta.
For: Claude (Axion). Anthropic-specific SDK; directly powers every Claude Code and Hermes API call.
Verdict: build now. Released today; skills auto-loading from GitHub directly solves the axion-skills sync gap; session budgets cap night-shift cost risk; upgrade is a one-liner.
Build #1 anthropic-sdk-python v0.121.0: use the ai-implementation-build-intake skill to build this safely. Source: https://github.com/anthropics/anthropic-sdk-python/releases/tag/v0.121.0. Save canonical skill/agent under AXION\Skills and AXION\Agents.
Source · GitHub release v0.121.0 published 2026-08-07; changelog: session budgets, advisor tool, pinned inference location, skills auto-loading from GitHub, mid-conversation-tool-changes-2026-07-01 beta, Opus 4.1 removal. Anthropic official SDK.