| Sanctioned development cost | ₹15,803 crore (US$1.7 billion) for full-scale engineering development, approved by the CCS in March 2024 | as of 5 Jul 2026 ↗ |
| Prototype build scope | 5 flying prototypes + 1 structural test airframe + 1,800 flight-test sorties, ~₹15,000 crore government-funded phase at a new Puttaparthi facility; RFP issued 27 May 2026 to three private bidders; bids closed 30 October 2026 (after extensions from 27 July and 27 August), technical bids opened 31 October 2026; partner selection expected February–March 2027 (four to five months after submission) | as of 30 Oct 2026 ↗ |
| Timeline targets | Programme target for first flight is September 2028 (Defence Secretary, 27 Sept 2026; RFP requires first flight within 30 months of contract signing and all five prototypes flown through 1,800 sorties within 84 months), but the Air Chief is reported in October 2026 saying the 2028 target will not be met given partner selection only due February–March 2027; earlier DRDO chief guidance (Jan 2026) was rollout by end-2028 and maiden flight in 2029 — treat as 2028–2029 at best, slipping; full-scale production targeted mid-2030s | as of 30 Oct 2026 ↗ |
| Mk1 / prototype engine | GE F414-INS6 (~98kN), 15 engines needed for the five twin-engine prototypes; quoted price surged from ₹70–80 crore to roughly ₹210–240 crore per unit, pushing ADA to evaluate alternatives | as of 24 Jun 2026 ↗ |
| Mk2 engine race | Safran–GTRE joint venture for a clean-sheet ~120kN engine (uprated variant toward 140kN planned) reported before the CCS, with clearance expected by 15 August 2026; reported terms: 100% Indian IP, full technology transfer including the hot section, nine prototype engines through certification, HAL as manufacturing partner, 10–12-year timeline; cost estimates conflict — over ₹30,000 crore to ~₹61,000 crore (~US$7 billion) — and none of it is officially confirmed (supersedes the earlier open Safran vs Rolls-Royce contest) | as of 3 Aug 2026 ↗ |
| Industrial partners in contention | Tata Advanced Systems (solo), L&T-led consortium (with BEL and Dynamatic Technologies), Bharat Forge/Kalyani-led consortium (with BEML, Data Patterns); HAL not shortlisted (reported to have bid with two smaller partners and failed the technical and financial criteria, including the order-book test) — bids closed 30 October 2026, winner becomes the first private-sector lead of an Indian fighter programme | as of 30 Oct 2026 ↗ |
| Planned IAF fleet | 7 squadrons (~126 aircraft) planned; 25-tonne-class twin-engine stealth fighter, induction targeted mid-2030s | as of 5 Jul 2026 ↗ |