skillguard/.agents/memory/openai-temperature-gpt5.md

---
name: OpenAI gpt-5 series rejects non-default temperature
description: gpt-5* models error on temperature != 1; omit temperature in OpenAI-compatible clients for cross-model compatibility
---

# OpenAI-compatible client: do not send a non-default `temperature`

When calling OpenAI-compatible `chat/completions`, the gpt-5 series (e.g. gpt-5-mini,
the Replit AI Integrations modelfarm default) returns `HTTP 400 unsupported_value`:
"`temperature` does not support 0.1 with this model. Only the default (1) value is
supported." This silently disables AI analysis (`aiUsed:false`, `aiError` set).

**Rule:** omit `temperature` from the request body for broad model compatibility,
rather than hardcoding a low value for determinism.

**Why:** older models accepted `temperature: 0.1` but gpt-5* only accept the default.
A hardcoded low temperature breaks every scan against modern models.

**How to apply:** in the OpenAI-compatible AI-analysis path, do not send `temperature`.
If reintroducing sampling controls, gate them per model or make them optional.