One job, one card, one API
Anthropic: Claude Sonnet 4.5 on GeForce RTX 4090
The sums below use the “Chatbot for a small team” example: 4,200 jobs a month, 1,500 tokens in, 400 out. 8 people, 25 questions on each of 21 working days. 1,500 tokens in (the question plus a short history) and 400 tokens out. A worked example, not a log from a real team.
Not enough yet
The API comes to £32.85 a month for this job. There is no speed for running it locally, so the electricity and the break-even are left blank.
- API this month
- £32.85
- Electricity this month
- Blank
- GPU purchase
- Not on file
- Break-even
- Needs a speed
- 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.
- No tokens-per-second figure, so the electricity line is blank. Type one in if you have measured it.
- API price: £2.24 in and £11.18 out per million tokens, from $3.00 and $15.00 at 0.74501 dollars to the pound on 2026-11-10. OpenRouter feed 2026-11-11.
- GeForce RTX 4090: 24 GB GDDR6X. Total graphics power: 450 W. Specs read 2026-11-11.
- No sourced speed for this pair, and none was typed in.
- Upper estimate, based on the official total graphics power of 450 W.
OpenRouter prices · Exchange rate · GPU spec · Ofgem unit rate