Terafab compute split 25/75 between Tesla and SpaceX; Tesla admits Cybertruck PCS defect and extends warranty to 8 years/150,000 miles
Musk has confirmed in his own words that Terafab's compute will be split 3:1. Tesla pays to build the chip plant and SpaceX takes the bulk of the compute, which is the hardest first-hand evidence yet for the worry that Tesla is bankrolling SpaceX ahead of a merger.
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Tesla's admission of the Cybertruck PCS defect and the warranty extension help on trust, but they expose a batch-level quality-control flaw in 2024-25 vehicles, and the cost falls on an automotive gross margin that has already collapsed to 16.3%. It is one more data point for the main thread: the deeper the merger narrative binds the two companies, the weaker the anchor for valuing Tesla as a standalone carmaker.
Key evidence
- Musk, replying on X: of the compute from the $16.8 billion Terafab chip plant, about 25% will go to Tesla's Optimus robots and about 75% to SpaceX's AI space computing (Benzinga, 9 Aug)
- Wedbush describes Terafab as an early step towards a Tesla-SpaceX merger. The 3:1 split confirms the structure: Tesla pays, SpaceX takes the output
- On 9 Aug Jefferies cut its FY26 EBIT forecast by 37% in one go, to $3.9 billion. With the Q2 operating margin at just 1.4% and FCF negative, Tesla is shouldering supply exposure running into double-digit billions yet gets only 25% of the output
- Tesla has formally admitted that the power conversion system (PCS) in pre-2026 Cybertrucks does not meet reliability standards. It has extended the warranty on 2024-2025 models from the basic term to 8 years/150,000 miles and will fully reimburse owners who paid for repairs themselves (Electrek, 8-9 Aug)
- Single repair bills had run as high as about $7,200. Tesla had previously offered only a goodwill discount of about $1,000 before public pressure forced it into a full admission
- TSLA closed at $328.58 on 8 Aug (down about 30% year to date). The consensus price target from 47 analysts is about $397.87, with Ives's $600 the ceiling. Forward P/E is about 295x
- Polymarket puts the August close at about $315.72 and gives Optimus only a 14.5% chance of commercialisation by year end. Q2: gross margin 16.3%, operating margin 1.4%, FCF negative
Catalysts to watch
- Official disclosure of the Terafab funding split (not yet published)
- Firmer evidence behind the Tesla-SpaceX merger narrative
- The hit to Q3 automotive gross margin from the direct cost of mass Cybertruck PCS replacements and reimbursements
- Progress on commercialising the Optimus robot (prediction markets give it only 14.5%)
Risks
- The deeper the merger narrative binds the two companies, the weaker the valuation anchor for Tesla as a standalone carmaker
- Cybertruck quality-control inconsistency has gone from scattered anecdotes to an officially acknowledged batch-level defect
- Terafab supply exposure running into double-digit billions for only 25% of the output confirms a structure in which Tesla bankrolls SpaceX
- Fundamentals (16.3% gross margin, 1.4% operating margin, negative FCF) remain detached from a share price propped up by long-dated AI optionality
- Extreme valuation at about 295x forward P/E
Sources (6)
- Benzinga, 9 Aug: Musk's reply on X about Terafab compute allocation
- TSLA-SPCX coverage
- Electrek, 8-9 Aug: official Cybertruck PCS warranty extension
- Jefferies, 9 Aug: FY26 EBIT forecast cut
- Wedbush research (Ives)
- Polymarket markets on TSLA's August close and Optimus commercialisation
A brief is a lead for our research, not a verified conclusion or advice.