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API Changes

Ultrathink's source-backed coverage of API Changes. 2 stories so far. Latest, on : Anthropic Python SDK v0.121.0 unlocks mid-conversation tool changes and automated workflows.

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Thumbnail for: Anthropic Python SDK Update Introduces Dynamic Tooling
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Anthropic Python SDK v0.121.0 unlocks mid-conversation tool changes and automated workflows

Discover how the Anthropic Python SDK v0.121.0 update introduces dynamic mid-conversation tool changes and automated GitHub skill loading.

Thumbnail for: OpenAI GPT-5.5 Release Imminent: Spotted in Official Python SDK
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OpenAI leaks GPT-5.5 in Python library update, prepping infrastructure for next-gen agentic models

OpenAI's latest python SDK release (v2.53.0) exposes 'gpt-5.5' model types and new tool namespacing, signaling an imminent frontier model rollout.