{"uid":"cap_GzeAyUkfU70JjOpXm-hny","slug":"pre-swap-model-parity-check-procedure-d75550fb","name":"Pre-Swap Model Parity Check Procedure","description":"Paid agent-facing procedure: before swapping a frontier model per task, run a deterministic parity gate. Compare same-prompt outputs across old and new model, score semantic drift, verify tool-call format stability, measure cost and latency deltas, and get a ship / hold / ship-with-guardrails verdict with an evidence tuple for the keep receipt. Includes inputs, thresholds, failure modes.","url":"https://k2so.wrong.systems/api/services/pre-swap-model-parity-check-validate-frontier-mo?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"pre-swap model parity check procedure paid 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a deterministic parity gate before swapping a frontier AI model for a task, comparing outputs for semantic drift, tool-call format stability, cost, and latency to return a ship/hold/ship-with-guardrails verdict.","exampleAgentPrompt":"Before I switch my agent from GPT-4o to Claude 3.7 Sonnet on the document-summarization task, run a parity check — I need to know the semantic drift score, whether tool-call formats are still compatible, and whether I should ship, hold, or ship with guardrails.","exampleUseCases":[{"title":"Pre-deployment model upgrade gate","prompt":"I'm about to upgrade my customer-support agent from Llama 3.1 to Llama 3.3 — can you run a parity check and tell me if there's meaningful semantic drift or any tool-call format issues I should worry about before I flip the switch?"},{"title":"Cost-justified model downgrade check","prompt":"I want to swap my coding agent from GPT-4o to DeepSeek V3 to cut costs — run the parity gate and tell me if the quality drop is acceptable or if I should hold off."},{"title":"Guardrails-required partial rollout decision","prompt":"My team wants to roll out Gemini 2.0 Flash in place of our current model for the data-extraction pipeline — get me a ship/hold/ship-with-guardrails verdict with the evidence tuple so I can justify the decision to stakeholders."}],"resultDescription":"Returns a JSON object with a plain-prose decision procedure brief (120+ words), a ship/hold/ship-with-guardrails verdict, semantic drift score, tool-call format stability assessment, cost and latency deltas, an evidence tuple for audit/keep receipts, and metadata including model used, topic, timestamp, and generation source (llm/reasoning/deterministic).","failureModes":["Payment not included or insufficient — returns 402 Payment Required with x402 challenge","Invalid or missing query parameters — returns validation error","Model identifiers not recognized or unreachable — procedure may fall back to deterministic generation","LLM generation failure — generationSource falls back to deterministic with reduced fidelity","Topic override malformed — ignored or causes empty procedure output"],"whenToPreferThis":"Choose this endpoint when an AI agent or MLOps workflow needs a structured, auditable go/no-go decision before swapping a frontier model in production. It is especially valuable when tool-call format stability is critical, when cost or latency budgets are tight, or when a compliance-friendly evidence tuple is needed to document the swap decision. Prefer this over manual evaluation when operating unattended agents at scale.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-15T12:33:42.484Z","isFirstParty":false,"canonicalSlug":"pre-swap-model-parity-check-procedure-d75550fb"}