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Antigravity SDK adds offline agents via local Gemma 4 26B

Google’s Antigravity SDK now runs agentic workflows fully offline with LiteRT and Gemma 4 26B A4B (plus Ollama, LM Studio, or vLLM via OpenAI-compatible backends). A hybrid demo keeps code on-device: Gemini 3.8 Flash plans in the cloud while local Gemma instances audit and patch, with ~97% of tokens staying offline.

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Opus 5.5 cuts price but breaks four Claude agent API patterns

Anthropic’s Opus 5.5 is cheaper than Opus 5, but its migration guide flags four breaking changes—always on thinking, no forced tool choice, append only thinking blocks, and a new computer use toolset—that can return 400s in existing agent loops. Claude Code and Managed Agents already handle it; custom agents need code changes before flipping the model ID…

The New Stack

Claude Code cloud sessions now generally available

Anthropic moved Claude Code cloud sessions (formerly Claude Code on the web) out of research preview on Sept 23 for Pro, Max, and Team, plus eligible Enterprise seats. Sessions run on Anthropic managed VMs so work continues with the laptop closed, sharing rate limits with other Claude Code usage…

Anthropic

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