Google Antigravity release notes: CLI 1.1.13 adds API-key access and SDK budgets

Between August 12 and 14, Google released new versions of the Antigravity app, CLI, and Python SDK. CLI 1.1.13 can use a Gemini API key without signing in with Google. SDK 0.1.11 changes the default model to Gemini 3.7 Flash and adds limits for a complete agent session. App versions 2.8.0 and 2.8.1 fix crashes and slow message handling.

Google Antigravity release notes: CLI 1.1.13 can use GEMINI_API_KEY

Antigravity CLI is the terminal client for running Antigravity agents. Version 1.1.13, published on August 14, now supports a direct Gemini API connection through the GEMINI_API_KEY environment variable. This route does not require signing in to the CLI.

Human step

Set modelProvider to "gemini" in your existing settings.json:

\{
  "modelProvider": "gemini"
\}

Then put the key in the environment variable:

If you use a custom endpoint, the release also supports GOOGLE_GEMINI_BASE_URL. The CLI banner and /help show Gemini API key as the active credential. /logout explains that the key comes from the environment instead of pretending to end a signed-in session.

The release also fixes two faults in the direct API route. The CLI now bypasses the sign-in screen, and requests to a custom endpoint no longer include a session field that the endpoint might not support.

Source: Antigravity CLI 1.1.13 release notes.

Antigravity SDK 0.1.11 adds Gemini 3.7 Flash and session budgets

Antigravity SDK is Google's Python package for building agents on Antigravity. Version 0.1.11 changes the default model to gemini-3.7-flash and adds BudgetConfig, which lets developers cap total tokens, turns, and cost for a session. StopReason then reports why a run ended, such as BUDGET_EXCEEDED, TURN_LIMIT, or USER_CANCELLED.

The same release supports Vertex AI Express Mode through VertexEndpoint(api_key=...) or LocalAgentConfig(vertex=True, api_key=...). Its default behavior also changes from interactive to AgentBehavior.AUTONOMOUS. Workflows that need questions and approvals during a run can select CapabilitiesConfig(agent_behavior=AgentBehavior.INTERACTIVE).

SDK 0.1.12 followed on August 13 and fixes deserialization of ActionGenerateImage.output_path. The fault could occur when the bundled binary returned the field but the Python proto did not contain it.

Source: Google Antigravity changelog for SDK 0.1.11 and 0.1.12.

Antigravity 2.8.0 and 2.8.1 fix app stability

App 2.8.0 remembers which project folders are open or collapsed between sessions. It also limits the size of file previews and history changes, fixing frequent crashes in conversations with large command output. The Linux build restores the application header and top menu, and multi-line commands retain their line breaks in activity history.

App 2.8.1 fixes hangs and slow responsiveness when users send messages to the agent. Google rolls out new app versions gradually, so they may take a few days to reach every user.

Source: Google Antigravity changelog for 2.8.0 and 2.8.1.