// AI news · 2026-10-21 · Google Cloud
Claude Opus 5.5 and Sonnet 5.5 now available in Google Antigravity
Google Cloud has launched Claude Opus 5.5 and Sonnet 5.5 in Antigravity for enterprise customers.
Published 2026-10-21 00:00 (Beijing time)Source Google CloudAuto-summarised, fact-checked against source
01Summary
These models serve complex and fast, low-cost tasks respectively. Developers can select them via the model picker in Antigravity 2.0, CLI, or IDE integrations. Two engineering patterns are supported: cross-model verification to validate outputs independently, and offloading routine tasks to Gemini Flash subagents for efficiency. Lightweight first-party models continue running for background coordination, consuming their own tokens.
Summarised from the original article by an open-source model, then checked automatically: every number and English name must appear in the source. The original article is authoritative.
02Key points
- Claude Opus 5.5 is optimized for complex workloads; Sonnet 5.5 offers speed and cost efficiency.
- Models are accessible across Antigravity 2.0, CLI, and IDE extensions with unified billing and security.
- Cross-model verification improves code quality by enabling independent validation steps.
- Flash subagents offload high-volume tasks like log triage to reduce latency and cost.
03Source
Claude Opus 5.5 and Claude Sonnet 5.5 are now available in Google Antigravity
Google Cloud · published 2026-10-21 00:00 Beijing time
Also reported by 3 other outlets
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