Mistral Medium 3.5 and Small 4: High Reasoning Effort

According to current Mistral provider specifications, mistral-medium-3-5 (best for agentic and coding-heavy workloads) and mistral-small-latest (mistral-small-2603, best for hybrid instruct, reasoning, and coding) support adjustable reasoning via reasoning_effort: high (or prompt_mode: reasoning on native reasoning models) paired with strict json_schema output formatting.

Config: model="mistral-medium-3-5", reasoning_effort="high", response_format={"type": "json_schema", "json_schema": {"name": "answer", "schema": {"type": "object", "required": ["answer"]}}} User: Diagnose the multi-service distributed transaction rollback bug in the attached trace.