# GROK：モデル・ツール・情報源・状態の選択

CURRENT_STATUS: UNKNOWN
OBSERVATION: UNOBSERVED
FRESHNESS: UNKNOWN
PAGE_TYPE: reference
CANONICAL_URL: /providers/pm-grok-core-04
CLAIM_IDS: none
EVIDENCE_IDS: EVD-PM-GROK-CORE-04-URL-905D5D7A5FB4, EVD-PM-GROK-CORE-04-URL-EA2EA7424A68, EVD-PM-GROK-CORE-04-URL-29D8779094F4, EVD-PM-GROK-CORE-04-URL-3F1544893DBF, EVD-PM-GROK-CORE-04-URL-6ABB173E59DB, EVD-PM-GROK-CORE-04-URL-91B071F77D8D, PM-GROK-CORE-04-DOCUMENT-READBACK
UNKNOWN_IDS: PM-GROK-CORE-04-CURRENTNESS
OPS_IDS: none

## Summary
CORE-04のmodel / tool / source / state routing、fallback、service capacity、cost/error observability契約をxAI APIへ対応づける。model alias/date pin、retired-slug redirect、search/tool、Priority/Default、rate limit、online/deferred/Batch、SDK別telemetryを同一routeとしない。公開仕様から閉じないteam tier、quota、契約、live latency/quality、実効routing、外部受入はUNKNOWNに残す。

## Current judgment
CORE-04のmodel / tool / source / state routing、fallback、service capacity、cost/error observability契約をxAI APIへ対応づける。model alias/date pin、retired-slug redirect、search/tool、Priority/Default、rate limit、online/deferred/Batch、SDK別telemetryを同一routeとしない。公開仕様から閉じないteam tier、quota、契約、live latency/quality、実効routing、外部受入はUNKNOWNに残す。

## Scope
CORE-04のmodel / tool / source / state routing、fallback、service capacity、cost/error observability契約をxAI APIへ対応づける。model alias/date pin、retired-slug redirect、search/tool、Priority/Default、rate limit、online/deferred/Batch、SDK別telemetryを同一routeとしない。公開仕様から閉じないteam tier、quota、契約、live latency/quality、実効routing、外部受入はUNKNOWNに残す。

## Confirmed

## UNKNOWN
- PM-GROK-CORE-04-CURRENTNESS: 原資料の確定版から収録しています。外部根拠の最新性を今回の取込日で確認済みと扱いません。本文の未解決事項・残余制約を保持します。

## Evidence
- EVD-PM-GROK-CORE-04-URL-905D5D7A5FB4 (RESEARCH): xAI Models: <[ — https://docs.x.ai/developers/models
- EVD-PM-GROK-CORE-04-URL-EA2EA7424A68 (RESEARCH): xAI Rate Limits: <[ — https://docs.x.ai/developers/rate-limits
- EVD-PM-GROK-CORE-04-URL-29D8779094F4 (RESEARCH): xAI Priority Processing: <[ — https://docs.x.ai/developers/advanced-api-usage/priority-processing
- EVD-PM-GROK-CORE-04-URL-3F1544893DBF (RESEARCH): xAI Cost Tracking: <[ — https://docs.x.ai/developers/cost-tracking
- EVD-PM-GROK-CORE-04-URL-6ABB173E59DB (RESEARCH): xAI Debugging Errors: <[ — https://docs.x.ai/developers/debugging
- EVD-PM-GROK-CORE-04-URL-91B071F77D8D (RESEARCH): xAI Model Retirement on May 15, 2026: <[ — https://docs.x.ai/developers/migration/may-15-retirement
- PM-GROK-CORE-04-DOCUMENT-READBACK (IMPL): 原資料との収録照合

## Practice
公開仕様の範囲でPM-GROK-CORE-04をbounded closeとする。自動redirectやservice-tier fallbackを同値性へ昇格せず、independent xAI production evidenceは未取得のまま、live model/tier/capability、team limit、SDK telemetry、retry/idempotency、price/SLO、Organization loss budgetをUNKNOWNに残す。Core claimは不変で、Gemini/GPT/Claudeの遡及監査は不要。次はPM-GROK-CORE-05へ進み、NotebookLM補充ゲートを維持する。
## 資料の識別情報
Source SHA-256 7db02ec76bac8cf0b70b608176dc605372a6ff50e2c592bf915ed6984aa38fb3

## Product Mapping — Grok / CORE-04
PRODUCT_MAPPING_ID: PM-GROK-CORE-04-v0.1

PROVIDER: GROK / xAI

CORE_PACKET: PKT-GEMINI-A-CORE-04-v0.1

AS_OF: 2026-09-12 21:00 JST

STATUS: PUBLIC_MAPPING_AUDITED / LIVE_RUNTIME_AND_ORG_PENDING

LAYER: PRODUCT_MAPPING (not Enterprise AI Core; not Organization Overlay)

## Scope and boundary
CORE-04のmodel / tool / source / state routing、fallback、service capacity、cost/error observability契約をxAI APIへ対応づける。model alias/date pin、retired-slug redirect、search/tool、Priority/Default、rate limit、online/deferred/Batch、SDK別telemetryを同一routeとしない。公開仕様から閉じないteam tier、quota、契約、live latency/quality、実効routing、外部受入はUNKNOWNに残す。

## Core → Grok mapping rows
1. ROW: PM-C04-GROK-001; Core contract: model route identity; xAI surface and evidence: current model catalogはbare name/-latestをlatest stable、date suffixを固定releaseとして区別する。一方、2026-05-15 retirementでは複数の旧slugがgrok-4.3等へ自動redirectされ、reasoning effortと価格も変化した; Mapping decision: requested_model / resolved_model / alias_or_date / reasoning_effort / response_model / retirement_rule_versionを別記録する。HTTP成功を同一model実行の証明にしない; Required verification / UNKNOWN: tenant availability、実際のserving build/cohort、redirect readbackの全endpoint coverageはUNKNOWN

2. ROW: PM-C04-GROK-002; Core contract: capability/prohibition prefilter; xAI surface and evidence: real-time dataはsearch toolを有効にしない限り利用不可。全modelがBatch対応ではなく、4.20以降はlogprobs/top_logprobsをsilent ignoreする; Mapping decision: required capabilityをmodel/tool/endpoint matrixで先に検査し、silent-ignore対象はresponse-side sentinelで確認する。非対応を品質scoreやretryで埋めない; Required verification / UNKNOWN: current tenantのmodel/tool matrix、silent-ignore以外のparameter behaviorはlive固定版試験なしではUNKNOWN

3. ROW: PM-C04-GROK-003; Core contract: tool/source route; xAI surface and evidence: client tool、server tool、web/X/search、Collections、Remote MCPは実行場所・権限・source/receiptが異なる; Mapping decision: tool_declared / selected / execution_location / allowed_tools / authorization / result / citation / external_receipt / readbackを分離する。検索可能性をauthority/freshness/permissionと同一視しない; Required verification / UNKNOWN: source ACL、MCP upstream IAM、external transaction、provider内部dispatchはUNKNOWN

4. ROW: PM-C04-GROK-004; Core contract: requested vs effective service; xAI surface and evidence: service_tier:"priority"を要求してもcapacity不足時にdefaultへfallbackし得て、responseのservice_tierが実際のtierを示す; Mapping decision: requested tierとobserved tierを別fieldにし、Priority→Defaultをmodel/capability同値とみなさない。billing/SLO判定もobserved tierへ結合する; Required verification / UNKNOWN: team契約capacity、実効price、SLO、fallback頻度はOrganization/live scope

5. ROW: PM-C04-GROK-005; Core contract: quota/rate-limit route; xAI surface and evidence: limitはteam/model単位のRPS/TPMで、cached/reasoning/completion/input tokenを含む。超過は429、team tierはConsole上のspend tierに依存する; Mapping decision: limit snapshot、model、team、attempt、429、backoff、wall-clockを記録し、bounded retry後は停止または能力保持routeへ送る; Required verification / UNKNOWN: current team tier/limits、header completeness、burst behaviorはUNKNOWN

6. ROW: PM-C04-GROK-006; Core contract: cost observability; xAI surface and evidence: responseはrequest単位のusage.cost_in_usd_ticksを返すが会話累積ではない。streamではinclude_usage指定時のfinal chunkだけ、Vercel AI SDKでは当該metadata非公開; Mapping decision: request/tool-loop/attemptを外部ledgerで集計し、final usage chunk欠落をCOST_INCOMPLETEにする。SDK telemetry gapを0 costへ変換しない; Required verification / UNKNOWN: negotiated price、billing reconciliation、interrupted stream/tool全経路の完全性はUNKNOWN

7. ROW: PM-C04-GROK-007; Core contract: error/retry envelope; xAI surface and evidence: 400/401/403/404/422/429とdeferred 202が公開され、404にはmodel not foundを含む; Mapping decision: request_id / status / error_hash / response_started / attempt / visited_route / retry_after / terminal_reasonを記録する。202を成功、429をautomatic provider switch、4xxを一律retryableにしない; Required verification / UNKNOWN: timeout、5xx、SDK retry、idempotency、stream中断後の安全な再送はlive固定版でUNKNOWN

8. ROW: PM-C04-GROK-008; Core contract: retirement/migration fallback; xAI surface and evidence: retired slugが動き続けても別model・reasoning effort・価格へredirectされる。これはavailability維持でありsemantic equivalenceではない; Mapping decision: retirement feedをroute invalidation eventにし、明示migration、capability/cost/regression再検証、effective model readbackを要求する; Required verification / UNKNOWN: redirectの終了日、全legacy slug、tenant例外、behavior equivalenceはUNKNOWN

9. ROW: PM-C04-GROK-009; Core contract: online/deferred/Batch route; xAI surface and evidence: deferredは202と24時間・一度限りの取得、Batchはpending/success/error/cancel/expiryを持つ; Mapping decision: online→deferred/Batchを新契約としてdeadline、interaction、ordering、partial result、retention、receipt、acceptance lossを事前評価する; Required verification / UNKNOWN: live completion、cancel race、dedupe、deadline適合はUNKNOWN

10. ROW: PM-C04-GROK-010; Core contract: final route observability; xAI surface and evidence: public response metadata、service tier、usage/cost、error statusはroute evidenceの一部だがbusiness acceptanceではない; Mapping decision: route eventにrequested/effective model、endpoint、tools、requested/observed tier、limit snapshot、usage/cost、error、fallback loss、verifier、final acceptanceをjoinする; Required verification / UNKNOWN: trace retention、sampling、immutable export、organization alert/SLOはUNKNOWN

## Fallback loss profile
| FROM | TO | EXPLICIT LOSS / CHANGE | STOP CONDITION |
| --- | --- | --- | --- |
| date-pinned model | alias/latest | behavior drift、unannounced future resolution | fixed identityがrequired |
| retired slug | automatic redirect | model、reasoning effort、price、possibly behavior | effective model/lossをverifyできない |
| Priority | Default | capacity class、latency/SLO、billing classification | contractual deadline/SLOを失う |
| model+search/tool | model-only | freshness、source evidence、tool result/receipt | source/tool requirementを失う |
| online | deferred/Batch | interaction、ordering、deadline、partial/expiry lifecycle | interactive state/tool loopまたはacceptance期限を失う |
| raw REST/OpenAI SDK | SDK without final usage metadata | cost/route telemetry completeness | cost/receiptがacceptance requirement |

## Safe verification profile
非機密synthetic fixtureと許可済みsandboxだけで実施する。今回はxAI API、team、Console、model、SDK、tool、Batch/deferred、外部systemを操作していない。

- alias、-latest、date pin、retired slugを送信し、requested/effective model、reasoning effort、price receiptを比較する。

- searchなしのfreshness要求、Batch非対応model、4.20以降のlogprobs sentinelでcapability preflightとsilent ignoreを検出する。

- Priorityを要求し、responseのobserved tierを記録してDefault fallbackを別route event化する。

- model/team別limitを固定し、429を注入してattempt/wall-clock/visited-route/error-hashで循環を停止する。

- non-stream、stream完了、final usage chunk前の切断、raw REST/OpenAI/xAI/Vercel SDKを比較しcost completenessを検査する。

- online/deferred/Batchを同一synthetic operation IDで結び、202、partial error、cancel、expiry、single retrievalを業務受入から分離する。

- retired redirectまたはmodel-not-foundをfail-closedで捕捉し、明示migration後にcapability/cost/regressionを再検証する。

既存CORE-04 local fixtures（10/10、16/16）はCOMPILER_EXPERIMENTのまま再利用し、Grok/xAIのlive品質・可用性・fallback挙動へ再分類しない。

## Open questions
| QUESTION_ID | QUESTION | CLOSURE BOUNDARY |
| --- | --- | --- |
| Q-PM-C04-GROK-001 | fixed/effective modelとcapability matrixを全routeで復元できるか | fixed release、alias/redirect、reasoning effort、tool/Batch/parameter supportをlive readbackで固定 |
| Q-PM-C04-GROK-002 | requested/observed tierとteam/model rate limitを安全なfallbackへ接続できるか | team Console値、429/priority fallback、SLO、loss budgetをauthorized sandboxで測定 |
| Q-PM-C04-GROK-003 | cost/usage/error telemetryはstream・tool loop・SDK間で完全か | interrupted stream、server tool、deferred/Batch、各SDKをrequest ledgerとbillingへ照合 |
| Q-PM-C04-GROK-004 | retirement/retry/fallback後もstate・receipt・acceptanceを保てるか | migration regression、idempotency、readback、owner/escalation、final acceptanceを組織契約で閉鎖 |

## Evidence
- xAI Models: <[https://docs.x.ai/developers/models](https://docs.x.ai/developers/models)> (updated 2026-08-21; accessed 2026-09-12)

- xAI Rate Limits: <[https://docs.x.ai/developers/rate-limits](https://docs.x.ai/developers/rate-limits)> (updated 2026-06-20; accessed 2026-09-12)

- xAI Priority Processing: <[https://docs.x.ai/developers/advanced-api-usage/priority-processing](https://docs.x.ai/developers/advanced-api-usage/priority-processing)> (updated 2026-06-15; accessed 2026-09-12)

- xAI Cost Tracking: <[https://docs.x.ai/developers/cost-tracking](https://docs.x.ai/developers/cost-tracking)> (accessed 2026-09-12)

- xAI Debugging Errors: <[https://docs.x.ai/developers/debugging](https://docs.x.ai/developers/debugging)> (updated 2026-05-13; accessed 2026-09-12)

- xAI Model Retirement on May 15, 2026: <[https://docs.x.ai/developers/migration/may-15-retirement](https://docs.x.ai/developers/migration/may-15-retirement)> (updated 2026-09-02; accessed 2026-09-12)

- EXT-G01-004/005/007 and EXT-G03-001..006 are reused for deferred/Batch/SDK/tool/compaction/WebSocket boundaries. CORE-04 provider-neutral research and LiteLLM incident evidence retains its original provenance.

## Boundary decision
公開仕様の範囲でPM-GROK-CORE-04をbounded closeとする。自動redirectやservice-tier fallbackを同値性へ昇格せず、independent xAI production evidenceは未取得のまま、live model/tier/capability、team limit、SDK telemetry、retry/idempotency、price/SLO、Organization loss budgetをUNKNOWNに残す。Core claimは不変で、Gemini/GPT/Claudeの遡及監査は不要。次はPM-GROK-CORE-05へ進み、NotebookLM補充ゲートを維持する。

NEXT: /agent/start.json
STOP: This is a knowledge projection, not an execution order.