Claude Sonnet 5.5 launched on September 28, 2026 at the same price as Claude Sonnet 5, $2 per million input tokens and $10 per million output tokens. Moving to it is not a model-ID swap. Several
Tue Sep 29 2026 · 6 min read · 2 views
If your code moves from claude-opus-5 to claude-opus-5-5 and starts returning 400 errors, one of two request fields is the cause. Either thinking is set to disabled, or toolchoice is set to any or
Fri Sep 25 2026 · 8 min read · 40 views
Python 3.10 reaches end of life in October 2026. The Python developer guide's version status table lists the branch as security-only with a 2026-10 end date, and community discussion has settled on
Fri Aug 21 2026 · 5 min read · 11 views
.NET 8 and .NET 9 lose Microsoft support on November 10, 2026. After that date there are no servicing updates, no security fixes and no technical support for either version, according to Microsoft's
Fri Aug 21 2026 · 5 min read · 4 views
Most of the Spring Boot 4 migration announces itself. Packages move, classes get renamed, and the compiler tells you. One change does not, and it is the one worth reading first.
Fri Aug 21 2026 · 6 min read · 18 views
Set temperature=0.7 on Claude Opus 5 and the request fails. The API returns a 400 error, not a warning and not a silently ignored parameter. The same happens with topp, topk, and with the manual
Fri Aug 21 2026 · 6 min read · 40 views
The riskiest Pydantic AI v2 migration change raises no exception: openai: model names now hit the Responses API. Here is the safe upgrade path.
Thu Aug 20 2026 · 5 min read · 7 views