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[ARTICLE · art-155653] src=driftwatch.et ↗ pub= topic=ai-tools verified=true sentiment=· neutral

OpenAI: role is no longer accepted

OpenAI's published API specification no longer accepts the `role` field on `DecisionInputMessage`, which is reachable from one OpenAI operation, according to an API-change tracker. The field was previously present and is now absent; the tracker warns that requests sending `role` are typically ignored rather than rejected, so the call succeeds while behaving subtly differently. The change affects code that sends `DecisionInputMessage` objects to that single operation, and the tracker advises developers to grep for the field because nothing else will flag it.

read1 min views1 publishedOct 22, 2026

What changed #

Usually ignored rather than rejected, so the call succeeds and does something subtly different.

Affects role on DecisionInputMessage reachable from 1 operation. Grep for it: nothing else will tell you.

Who is affected #

Code that sends OpenAI's DecisionInputMessage objects, used by 1 OpenAI operation.

Before and after #

Where Before After
DecisionInputMessage.role present absent

Code that breaks #

await client.post("/…", {
  // role is now ignored, not rejected
  role: value,
});

Based on OpenAI’s published API specification. How severity is decided.

source & further reading
driftwatch.et — original article OpenAI: type is no longer accepted OpenAI: phase is no longer accepted [Behavioral] OpenAI: Status code no longer documented
── more in #ai-tools 4 stories · sorted by recency
── more on @openai 3 stories trending now
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