sdk

Anthropic released Python SDK v0.108.0 on June 9, 2026, adding support for two new Claude models: Claude Mythos-5 and Claude Fable-5. The update includes both server-side and client-side fallback middleware for handling model refusals.

Vercel released version 4.0.0-canary.75 of its AI SDK Google package on May 30, adding support for three new Google models: gemini-embedding-2, deep-research-max-preview-04-2026, and deep-research-preview-04-2026. The update enables developers to integrate Google's latest embedding and deep research capabilities into applications built with the Vercel AI SDK.

Anthropic released version 0.104.0 of its Python SDK on May 21, 2026. The update adds support for a thinking-token-count beta feature that provides estimated token counts in thinking block deltas when streaming responses from reasoning models.

Google announced Antigravity 2.0 at I/O 2026, transforming its coding tool into a full developer platform with a revamped desktop app supporting multi-agent orchestration, a new Go-based CLI, and an SDK for custom agents. The company introduced a $100/month AI Ultra tier and confirmed Gemini CLI will shut down for consumers on June 18, 2026.

OpenAI has updated its Agents SDK with sandboxing capabilities that allow AI agents to operate in controlled environments, plus an in-distribution harness for frontier model deployment. The features launch initially in Python, with TypeScript support planned.

Anthropic released version 0.92.0 of its Python SDK on April 8, 2026, introducing support for Claude Managed Agents. The update enables developers to integrate agent capabilities directly through the SDK.

Anthropic released version 0.90.0 of its Python SDK on April 7, 2026, adding support for the claude-mythos-preview model. The update also includes a bug fix for query parameter merging in the client.

Google has released an Agent Skill for the Gemini API that provides language models with current information about their own APIs, SDKs, and best practices. Testing across 117 coding tasks showed Gemini 3.1 Pro's success rate jumped from 28.2% to 96.6%, though older 2.5-series models showed minimal improvement.

GitHub has released the Copilot SDK, positioning executable agent workflows as the successor to prompt-based AI interactions. The SDK enables developers to integrate agentic AI capabilities directly into applications rather than relying on text-based prompt-response patterns.