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# LLM API cost estimator

Tokenize your prompt with the model's own encoding, add the reply you expect, and see the exact dollar figure at dated vendor prices.
exact BigInt arithmetic · prices effective 2026-08-26 — re-check the vendor page before you budgetEstimateClearModel

$ 1.25 in / $ 10 out per 1M · $0.125 cached in
Output tokens per requestRequests

You cannot know output tokens in advance — enter the reply length you are budgeting for.

Set the inputs, then press Estimate.

- Input tokens are counted exactly, with the selected model's encoding. Output tokens are your number — the tool cannot predict a reply's length.
- Prices are a dated snapshot of the vendor's published per-1M rates (standard tier; documented long-context tiers applied above their boundary). Costs are exact BigInt arithmetic on those prices — no float rounding anywhere in a dollar figure.
- Not modeled, on purpose: cached-input discounts on your billed line (shown as a separate reference), batch rates, tool-call framing, and per-request platform fees where a provider charges them. A fake "efficiency" factor would just be lying with decimals.
- Prices change — the effective date ships with every result. Re-check the vendor page before committing a budget.

- gpt-5.6-sol$ 4 / $ 20
- gpt-5.6-terra$ 2 / $ 12
- gpt-5.6-luna$ 0.2 / $ 1.2
- gpt-5.6-cyber$ 12.5 / $ 75
- gpt-5.5$ 5 / $ 30
- gpt-5.5-pro$ 30 / $ 180
- gpt-5.4$ 2.5 / $ 15
- gpt-5.4-mini$ 0.75 / $ 4.5
- gpt-5.4-nano$ 0.2 / $ 1.25
- gpt-5.4-pro$ 30 / $ 180
- gpt-5.3-codex$ 1.75 / $ 14
- gpt-5.2$ 1.75 / $ 14
- gpt-5.2-pro$ 21 / $ 168
- gpt-5.1$ 1.25 / $ 10
- gpt-5$ 1.25 / $ 10
- gpt-5-mini$ 0.25 / $ 2
- gpt-5-nano$ 0.05 / $ 0.4
- gpt-5-pro$ 15 / $ 120
- gpt-4.1$ 2 / $ 8
- gpt-4.1-mini$ 0.4 / $ 1.6
- gpt-4.1-nano$ 0.1 / $ 0.4
- gpt-4o$ 2.5 / $ 10
- gpt-4o-mini$ 0.15 / $ 0.6
- o3$ 2 / $ 8
- o3-mini$ 1.1 / $ 4.4
- o3-pro$ 20 / $ 80
- o4-mini$ 1.1 / $ 4.4
- o1$ 15 / $ 60
- chat-latest$ 5 / $ 30
- gpt-4-turbo$ 10 / $ 30
- gpt-3.5-turbo$ 0.5 / $ 1.5
Nothing in yet

Paste, drop, or type to begin. Everything stays on this device.

nothing estimates until you press Estimate

## Next door in AI

- [Context fit](/ai/context-fit)
- [Tokenizer playground](/ai/tokenizer)
[All AI tools](/ai)

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Canonical HTML: https://nutter.tools/ai/cost-estimator
Markdown version: https://nutter.tools/ai/cost-estimator/index.md
Plain-text version: https://nutter.tools/ai/cost-estimator/index.txt
Agent index: https://nutter.tools/llms.txt