Two new Claude API betas: `compact-2026-09-04` moves summarization off the critical path into a background call, and the `auto` permission mode shifts tool trust evaluation from your code to the server. Both change how you design stateful agentic loops.
Gemini 3.5 Flash now ships computer use as a built-in tool alongside Search and Maps grounding — no separate model required. That consolidation changes how operators route browser and desktop automation workloads.
Anthropic's June 11 platform update adds response_inclusion to web_search_20260318 and web_fetch_20260318, letting operators drop consumed search result blocks from API responses and cut output token costs in multi-step agentic workflows.
Anthropic's code execution tool now tells Claude about its 90-second per-cell time limit before it writes any code — reducing detection_timeout failures. What changed, which models support it, and the pipeline fixes operators need (including Haiku 4.5 routing gotchas).
