Google ships a new Antigravity agent; 05-2026 shuts down Oct 5
The 09-2026 model adds grep_search and line-range edits; keep the old preview pinned and your agent breaks in two weeks. Plus an open 3B music model to try.
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A new agent model — and a hard Oct 5 deadline
Google released antigravity-preview-09-2026 in the Gemini API, replacing the May build. The old antigravity-preview-05-2026 shuts down October 5, so if your agent pins that model, migrate to 09-2026 now or it stops serving in about two weeks.
grep_search and find_by_name ship in the agent
The 09-2026 agent can now discover code on its own via find_by_name(SearchDirectory, Pattern, MaxDepth) and grep_search(SearchPath, Query, IsRegex), so you stop hand-feeding it file paths. Editing also moved from full-file rewrites to line-range replace_file_content(TargetFile, StartLine, EndLine, ...) — smaller, cheaper diffs, and far less chance it clobbers a file it barely touched.
Tool params went PascalCase — check your bindings
Built-in tool parameters switched from snake_case to PascalCase (TargetFile, StartLine, not target_file). If you call these tools directly or validate their schemas, update your harness before you move to 09-2026 or the calls will silently mismatch.
Elsewhere: an open 3B model that writes editable songs
m-a-p's YuE2-3B is out on Hugging Face — open-weights music generation with symbolic planning, zero-shot covers, and agentic editing of the arrangement. It's small enough to run locally: a clean weekend build for text-to-song where you can still tweak the score after.