A commercial nuclear fusion plant supplies electricity to the grid before 2035.

Question

Six frontier AI models put this at 8% by 2 Nov 2036. Full reasoning from every model.

WillHappen.ai · Accepted Answer

8% — the median of 6 frontier models, resolving by 2036-11-02.

Answer

Gemini (Google): 18% — Grid delivery requires solving tritium breeding and materials degradation, then completing multi-year balance-of-plant construction. CFETR, ITER, and STEP all slate net electricity post-2035; only heavily funded private players like Commonwealth Fusion target earlier. Even if SPARC proves high-gain Q>1 by 2027, permitting, building, and commissioning the ARC power plant before 2035 is an extreme sprint. A firm public power purchase agreement and grid tie-in permit broken ground by 2029 would push these odds past 40%.

Answer

Claude (Anthropic): 2% — No demonstration plant has even achieved net electrical output yet, let alone grid-scale commercial supply by 2035. ITER aims for first plasma around 2035 and DT operations later, with no electricity generation planned at all. Private firms like Commonwealth Fusion and TAE target demo reactors in early-to-mid 2030s, not commercial grid supply. Historical fusion timelines have consistently slipped by decades; achieving sustained commercial grid power by 2035 would be an unprecedented acceleration.

Answer

GPT (OpenAI): 18% — It hinges on a private developer turning a first-of-a-kind net-energy device into a licensed grid plant within eight years. The likely candidates—CFS, Helion, and TAE—must prove repeatable net electric output, materials life, and plant availability first. ITER's first plasma is planned for 2035, while no fusion system has yet produced sustained net electricity; FOAK energy projects routinely slip. A verified Helion grid delivery under its Microsoft contract or CFS SPARC net-energy result by 2028 would materially raise the odds.

Answer

Grok (xAI): 12% — No net-power fusion device exists; commercial grid supply by 2034 needs a first-of-kind plant licensed and running in ~8 years. Helion, CFS and others must finish Q>1 devices, then a licensed plant, by ~2032 to hit 2034 grid delivery; NRC/IAEA licensing of novel designs typically takes 5+ years. ITER DT ops slip past 2039 and no prior fusion plant ever reached net electricity, so private-sector base rate sits far below fission FOAK timelines. A 2027–28 compact-device Q>5 result with tritium handling would raise odds; continued delays or materials failures would drop them further.

Answer

DeepSeek (DeepSeek): 4% — Whether any fusion startup can leap from first plasma to a licensed, grid-connected commercial plant in under a decade. No fusion device has yet produced net electricity; NIF's 2022 ignition was laser-based and never coupled to a generator. Commonwealth Fusion's SPARC (first plasma targeted 2026-27) and ITER's first plasma (2034-35) are experiments, not grid-connected commercial plants. Even optimistic private timelines (CFS ARC ~2030s, Helion 2028) require unproven tritium breeding, materials, and regulatory licensing before any power sale.

Answer

Qwen (Alibaba): 3% — No device has achieved net electricity; the engineering and licensing gap to grid delivery is a decade+ even after physics breakthrough. Even the most aggressive private timelines (Helion's 2028 Microsoft PPA) assume physics milestones not yet demonstrated, then require regulatory licensing and grid… ITER won't produce electricity at all; it's a research device with first plasma no earlier than ~2030, and no pathway to grid supply. A development that would change this: a private firm publicly demonstrating sustained net electrical output (not just plasma Q>1) before 2029, which none are credibly…

A commercial nuclear fusion plant supplies electricity to the grid before 2035.

A nuclear fusion experiment achieves a net energy gain factor Q greater than 5 before 2030.

The UK government approves additional funding beyond the £200 million grant for the Acorn carbon-capture project by November 2027.

China finalizes its proposed export controls on 40 technologies including solar manufacturing.

The Trump administration formally rescinds the Biden-era rule limiting methane emissions from oil and gas drilling.