Program · United States · Missile Defense Agency
Glide Phase Interceptor (GPI)
Glide Phase Interceptor (GPI) · Development · Missile Defense Agency
Updated
DevelopmentMissile Defense Agency
Awarded
—
Across linked awards
Cost to the Government
| Measure | Amount | Source |
|---|---|---|
| Program totals · 2 | ||
| Hypersonic Defense annual RDT&E referenceR-1 PE0604181C Hypersonic Defense. Annual appropriation scope, not lifetime development cost. FY2026 includes the listed reconciliation spend plan; FY2027 includes discretionary and mandatory requests where present. Shared program scope; cannot be attributed solely to this product. | $213.783M / yrNominal $; source budget basis | FY2027 R-1: Research, Development, Test & Evaluation Department of Defense Comptroller · Apr 2026 · figure FY2027 total request · PB2027 |
| R&D program totalA lifetime program R&D total was not established. Development contracts and shared program budgets are not substituted for that total. | Not established | — |
| Unit costs · 1 | ||
| CBO modeled acquisition / interceptorDerived from $292M for eight GPIs in CBO Table 4; this is a hypothetical architecture allocation. Modeled acquisition cost, not an actual contract, paid price or approved purchase. | $36.5MConstant 2026 $ · modeled | Costs of a Notional National Missile Defense System (2026 testimony) Congressional Budget Office · figure CBO 2026 notional architecture |
| Quantities · 2 | ||
| U.S. inventoryA current U.S. inventory was not established. Annual procurement, cumulative deliveries and production capacity are not a stockpile count. | Not established | — |
| U.S. procurement quantityNo comparable U.S. procurement quantity was established in this review. | Not established | — |
| Operating costs · 1 | ||
| Annual operations & supportA complete, system-specific annual operating and support cost was not established. Procurement, replacement rounds and contract support are different measures. | Not established | — |
Program totals · 2
- Hypersonic Defense annual RDT&E referenceR-1 PE0604181C Hypersonic Defense. Annual appropriation scope, not lifetime development cost. FY2026 includes the listed reconciliation spend plan; FY2027 includes discretionary and mandatory requests where present. Shared program scope; cannot be attributed solely to this product.FY2027 R-1: Research, Development, Test & Evaluation Department of Defense Comptroller · Apr 2026 · figure FY2027 total request · PB2027$213.783M / yrNominal $; source budget basis
- R&D program totalA lifetime program R&D total was not established. Development contracts and shared program budgets are not substituted for that total.Source not recordedNot established
Unit costs · 1
- CBO modeled acquisition / interceptorDerived from $292M for eight GPIs in CBO Table 4; this is a hypothetical architecture allocation. Modeled acquisition cost, not an actual contract, paid price or approved purchase.Costs of a Notional National Missile Defense System (2026 testimony) Congressional Budget Office · figure CBO 2026 notional architecture$36.5MConstant 2026 $ · modeled
Quantities · 2
- U.S. inventoryA current U.S. inventory was not established. Annual procurement, cumulative deliveries and production capacity are not a stockpile count.Source not recordedNot established
- U.S. procurement quantityNo comparable U.S. procurement quantity was established in this review.Source not recordedNot established
Operating costs · 1
- Annual operations & supportA complete, system-specific annual operating and support cost was not established. Procurement, replacement rounds and contract support are different measures.Source not recordedNot established
Earlier observations · 3
Superseded estimates and prices, each in its original scope and dollar basis.
| Measure | Amount | Source |
|---|---|---|
| Hypersonic Defense annual RDT&E reference1 | $175.893M / yrNominal $; source budget basis | FY2027 R-1: Research, Development, Test & Evaluation Department of Defense Comptroller · Apr 2026 · figure FY2025 actual · PB2027 |
| Hypersonic Defense annual RDT&E reference1 | $182.99M / yrNominal $; source budget basis | FY2027 R-1: Research, Development, Test & Evaluation Department of Defense Comptroller · Apr 2026 · figure FY2026 total enacted / spend plan · PB2027 |
| Hypersonic Defense annual RDT&E reference1 | $213.783M / yrNominal $; source budget basis | FY2027 R-1: Research, Development, Test & Evaluation Department of Defense Comptroller · Apr 2026 · figure FY2027 total request · PB2027 |
- Hypersonic Defense annual RDT&E reference1FY2027 R-1: Research, Development, Test & Evaluation Department of Defense Comptroller · Apr 2026 · figure FY2025 actual · PB2027$175.893M / yrNominal $; source budget basis
- Hypersonic Defense annual RDT&E reference1FY2027 R-1: Research, Development, Test & Evaluation Department of Defense Comptroller · Apr 2026 · figure FY2026 total enacted / spend plan · PB2027$182.99M / yrNominal $; source budget basis
- Hypersonic Defense annual RDT&E reference1FY2027 R-1: Research, Development, Test & Evaluation Department of Defense Comptroller · Apr 2026 · figure FY2027 total request · PB2027$213.783M / yrNominal $; source budget basis
1R-1 PE0604181C Hypersonic Defense. Annual appropriation scope, not lifetime development cost. FY2026 includes the listed reconciliation spend plan; FY2027 includes discretionary and mandatory requests where present. Shared program scope; cannot be attributed solely to this product.
The broader research line is not a GPI-only total
Hypersonic Defense funding supports a broader program scope. The source does not isolate lifetime GPI R&D. Planned Aegis integration and Japan’s partnership are recorded as development relationships.
FY2027 R-1: Research, Development, Test & Evaluation Department of Defense Comptroller · Apr 2026 · +2 more
Contracts & purchasing · 1
Ceilings, options and purchase agreements are not spending and are never added together. Obligations are under Contracts.
| Buyer → seller | Status | Value | Qty | Source |
|---|---|---|---|---|
| Missile Defense Agency → Northrop GrummanSelection announced; this source does not establish a production order or a comparable award value. | Development selection | Value not verified | — | MDA selects Glide Phase Interceptor developer, September 25, 2024 Missile Defense Agency · figure Sep 25, 2024 |
International buyers · 1
| Country | Qty | Status | Source |
|---|---|---|---|
| JapanCooperative development participation; not evidence of delivered interceptors or an allocated procurement quantity. | Not verified | Co-development partner · not a purchase | MDA selects Glide Phase Interceptor developer, September 25, 2024 Missile Defense Agency · figure 2024 |
Open research: Current U.S. inventory and complete annual operating-and-support costs require additional public evidence. Buyer records are selected examples, not a complete global order book.
What the government budgets and pays for this program, from budget justification books, appropriations, acquisition reports and contract announcements. Each figure states its dollar basis. What contractors were obligated is under Contracts.
No participants, contracts or systems recorded for this program yet.