February 2026
2 changes across the tools toolweight tracks. Newest first.
- Deprecation
Claude Sonnet 3.7 and Haiku 3.5 retired
Two widely deployed workhorse models went dark on the same day. Applications pinned to the dated snapshots had a hard cutover; those calling bare aliases had already been moved. A useful reminder that pinning buys you a deadline, not immunity.
- Change
RCS marketing outpaces RCS availability
By early 2026 every major provider on this roster markets RCS Business Messaging for Australia, but general availability remains patchy, per-message pricing is quote-only almost everywhere, and the billing treatment when RCS falls back to SMS is rarely documented. Treat RCS as a reason to keep the sending layer abstracted, not as a reason to choose a provider.