The AI Footprint ← All 134 models

How much energy does GPT-4 (Mar 2023) use?

OpenAI · released 2023-03-14

Complex prompt
77.7 Wh
≈ 143 m of driving
Everyday chat
3.33 Wh
Capability
35.7
Energy rank
125 of 134

What this figure is

Day-one estimate  Calculated from an estimated parameter count — the maker hasn't published one. Every model on this site is calculated the same way, so the comparison holds even where the absolute value carries uncertainty. Our figures are good to roughly a factor of two to three, which is why we only ever state a difference of 5× or more.

The figure above is an understatement. GPT-4 (Mar 2023) generates reasoning text you never see, and that text costs energy to produce. Our calculation counts a fixed answer length, so the real figure is higher — we cannot say by how much, because the amount is not published.

Is there a better choice?

A lighter model that does the job
OpenAI · capability 93.3. It is more capable than GPT-4 (Mar 2023) and uses about 9.8× less energy per answer: 7.94 Wh against 77.7 Wh.

What OpenAI publishes

Energy cannot be worked out without knowing how big a model is. Of the 31 models from OpenAI that we track, 24 can be assessed at all — the rest publish too little for anyone outside the company to calculate anything.

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Figure calculated 2026-09-01 · how these numbers are made · the full comparison of 134 models