GPT-6 Astra upgrade breaks Spring AI tool calls; switching to Responses API fixes it

Developer Dan Vega found that upgrading to GPT-6 Astra broke tool calling in Spring AI 2.1 on the Chat Completions API; switching a single configuration property to the Responses API fixed it without code changes.

2026-11-03 ~ 2026-11-04 · 2 related posts

• Model upgrade broke Spring AI tool calls — one-property switch to Responses API fixes it — therealdanvega · 2026-11-03
• GPT-6 Astra tool calls fail on Chat Completions; Responses API fixes them in Spring AI — therealdanvega · 2026-11-04