September 17, 2026 · Google Gemini API

Antigravity Agent 09-2026 released; 05-2026 version shuts down October 5, 2026

Antigravity Agent 09-2026 : Released antigravity-preview-09-2026, which replaces and deprecates antigravity-preview-05-2026.

If you run on a remote sandbox (environment: "remote") and read only output_text or model_output steps, update the agent string and nothing else changes.

If you run tools locally (local_environment) or parse function_call steps, the built-in tools changed. Parameters use PascalCase instead of snake_case, and file edits use line-range replacements instead of full rewrites.

| Capability | 05-2026 | 09-2026 | |---|---|---| | File creation | write_file(path, content) | write_to_file(TargetFile, CodeContent, Overwrite, Description) | | File editing | write_file(path, content), full rewrite | replace_file_content(TargetFile, StartLine, EndLine, TargetContent, ReplacementContent) | | File reading | read_file(path, offset, limit), byte offsets | view_file(AbsolutePath, StartLine, EndLine, ContentOffset) | | Directory listing | list_files(path) | list_dir(DirectoryPath) | | File and code search | None, agents used shell commands | find_by_name(SearchDirectory, Pattern, MaxDepth) and grep_search(SearchPath, Query, IsRegex) | | Shell execution | code_execution(command, timeout_seconds) | Unchanged | | Web search | google_search(queries) | Unchanged |

See the Antigravity Agent guide. antigravity-preview-05-2026 shuts down on October 5, 2026, tracked on the deprecations page.