AsOf

Anthropic · featureMessages API beta

validasserted
Valid from
2023-12-19
Valid until
still holds
Published
2023-12-19
Recorded by AsOf
2026-10-29
Checked
2026-10-31 · its source page states the value and the date
Confidence
0.70

Sources

“Messages API beta It’s easy to make subtle mistakes when formatting prompts for our existing API — particularly when prompts are dynamically constructed from a mix of user inputs. The new Messages API will help you catch errors early in development”— what the page says, read 2026-10-31