New Antigravity agent model renames tool params; old one dies Oct 5
Google's coding agent gains grep and line-range edits, Gemini CLI patches injection holes, and open weights now move most dev tokens.
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The PascalCase rename will break your tool calls
antigravity-preview-09-2026 switches built-in tool parameters from snake_case to PascalCase, so every existing tool call fails until you rename them. The old antigravity-preview-05-2026 shuts down October 5 — migrate before then.
Line-range edits and a built-in grep
The agent now edits files by line-range replacement instead of full rewrites, and adds find_by_name() and grep_search() for navigating a repo — bringing it closer to how Claude Code and Codex already work on large codebases.
Gemini CLI v0.60 closes injection paths
v0.60.0 (Sept 16) hardens web-fetch destination checks, adds RFC 9207 OAuth issuer validation, and enforces provenance on untrusted tool output. If you run the CLI in any automated or headless flow, update — these are prompt-injection surfaces.
Elsewhere: open weights now move most tokens
New usage data shows open-weight models — largely DeepSeek, Qwen, and Kimi — now handle roughly 62% of developer tokens while taking under 10% of the spend. The cheap-inference tier is where the volume is going, even as closed models keep about 96% of revenue.