Every Friday we capture new Anthropic model releases. Every Monday we publish a deploy-readiness decision. This is the live record.
| Date | Decision | Production model | Notes |
|---|---|---|---|
| 2026-05-29 | GO | Claude Opus 4.8 | Upgraded from Opus 4.6 at identical pricing. Required removing unsupported sampling parameters (4.7+ framework); code migrated and verified live. Quality-first. |
| 2026-05-18 | REJECT | Claude Opus 4.6 (unchanged) | Opus 4.7 formally rejected after three consecutive HOLDs. No observed regressions on 4.6; pre-launch QA bandwidth not available. Production anchor preserved. Will revisit post-launch with a real QA harness. |
| 2026-05-11 | HOLD | Claude Opus 4.6 (unchanged) | Opus 4.7 still pending QA from initial surfacing. No new top-tier release this past week. Production anchor preserved. |
| 2026-05-04 | HOLD | Claude Opus 4.6 (unchanged) | Opus 4.7 surfaced for evaluation. QA evidence incomplete. Production anchor preserved per quality-first principle. |