UK · pounds · no account
Is it cheaper to run the model, or rent the API?
For people who use Ollama, LM Studio or llama.cpp, and for small firms deciding whether to buy a GPU or keep paying the API. The sums are in pounds, and every number has a source or is labelled an estimate.
Rent it
Lean towards renting. The card would take about 21142 months to pay for itself on this job. That is a long time to assume the same prices and the same amount of work.
Upper estimate. 575 W × (3800 tokens ÷ 304.9 tokens/sec ÷ 3,600) ÷ 1,000 × 26.32p/kWh
That expression is pence for one job. Divide by 100 for pounds, then multiply by the jobs in the month. Inputs: 575 W maximum rated power, 3,800 tokens, 304.9 tokens/sec, 26.32p/kWh.
- API this month
- £1.16
- Electricity this month
- £0.88 · 3.34 kWh
- GPU purchase
- £5,999.99
- Break-even
- 21142 months
- API cost is input tokens and output tokens, priced per million, times jobs per month. No caching, batch discount, or free tier.
- Pound figures use the stored exchange rate. They are not a quote from the company that trained the model.
- Upper estimate. Every token, in and out, is divided by the reported tokens per second. Prompt tokens are usually faster than that, and a card rarely holds its maximum rated power for the whole job, so the real bill is often lower.
- Formula, in pence per job: 575 W × (3800 tokens ÷ 304.9 tokens/sec ÷ 3,600) ÷ 1,000 × 26.32p/kWh. Divide by 100 for pounds, then multiply by the jobs in the month.
- The tokens per second are one published run, not a promise for your PC. Context length and software change it.
- The watts are the card's maximum rated graphics power. Real draw during inference is usually lower.
- The standing charge on a home bill is not added. A GPU does not create a second one.
- API price: £0.112 in and £0.447 out per million tokens, from $0.150 and $0.600 at 0.74501 dollars to the pound on 2026-11-10. OpenRouter feed 2026-11-11.
- Speed: 304.9 reply tokens/sec, 514.5 prompt tokens/sec, Q4_K_M, llama.cpp 0.7.0-dev (commit 1268eda). Run r_vsype4pm1ko, marked Measured by llm-speed. Chat-short. No power draw in the row. Page read 11 November 2026.
- GeForce RTX 5090: 32 GB GDDR7. Total graphics power: 575 W. Specs read 2026-11-11.
- Speed is the cited run, not a guess.
- Upper estimate, based on the official total graphics power of 575 W.
OpenRouter prices · Exchange rate · GPU spec · Speed source · Ofgem unit rate