Split input correctly
Cached tokens are carved out of total input. In Standard mode, only that subset receives a recorded cache rate; Batch uses its own published input rate.
Source-backed AI Wiki tool
AI API cost and context planner
Turn a token workload into per-request, monthly, and annual estimates. Compare official prices and see which model context windows can actually hold the request.
No API keyInputs stay in your browserFacts reviewed 2026-07-23
This is a planning estimate, not a quote or invoice. Review the selected model's effective dates and caveats, then confirm the current provider price before committing a budget.
Private, browser-only estimate
No API key is needed. Your workload inputs stay on this device and are not saved or sent to a provider.
Workload
Tokens and request volume
Cached input is a subset of input, never an additional token count.
Selected estimate
GPT-5.6 Terra
gpt-5.6-terra
Per request
$0.0688
22K total tokens
Per month
$1,512.50
22K requests
Per year
$18,150.00
12 equal months
Cost composition
- Input
- $0.0388
- Output
- $0.0300
- Cache savings
- −$0.0113
Published rates
- Input / 1M
- $2.50
- Output / 1M
- $15.00
- Cached input / 1M
- $0.2500
Context and output fit
22K combined input + requested output
Context: 1.1M
Max output: 128K
1M context tokens remain before the published window limit.
ActiveRates effective Jul 23, 2026
Standard short-context processing. Requests above 272K input tokens receive long-context multipliers.
Ranked comparison
Compare sourced API prices
Sorted by estimated monthly cost. Select a row to inspect its rates and constraints above.
| Model | Per request | Per month | Context fit | Source |
|---|---|---|---|---|
| $0.002350 | $51.70 | 2.1% | Official ↗ | |
| $0.004200 | $92.40 | 8.6% | Official ↗ | |
| $0.009650 | $212.30 | 2.1% | Official ↗ | |
| $0.009650 | $212.30 | 2.1% | Official ↗ | |
| $0.0130 | $286.00 | Does not fit | Official ↗ | |
| $0.0255 | $561.00 | 11% | Official ↗ | |
| $0.0267 | $586.85 | 11% | Official ↗ | |
| $0.0275 | $605.00 | 2.1% | Official ↗ | |
| $0.0281 | $617.10 | 11% | Official ↗ | |
| $0.0383 | $841.50 | 2.1% | Official ↗ | |
| $0.0394 | $866.25 | 2.1% | Official ↗ | |
| $0.0413 | $907.50 | 2.1% | Official ↗ | |
| $0.0510 | $1,122.00 | 2.2% | Official ↗ | |
| $0.0550 | $1,210.00 | 2.1% | Official ↗ | |
| $0.0688 | $1,512.50 | 2.1% | Official ↗ | |
| $0.1275 | $2,805.00 | 2.2% | Official ↗ | |
| $0.1375 | $3,025.00 | 2.1% | Official ↗ | |
| $0.2550 | $5,610.00 | 2.2% | Official ↗ | |
| $0.2600 | $5,720.00 | 17% | Official ↗ | |
| $0.3825 | $8,415.00 | 11% | Official ↗ | |
| $0.3825 | $8,415.00 | 11% | Official ↗ | |
| $0.7200 | $15,840.00 | Does not fit | Official ↗ |
Model facts reviewed Jul 23, 2026. Estimates exclude taxes, minimum commitments, rate tiers, storage, web search, tools, grounding, fine-tuning, and provider-specific regional or partner-platform charges.
Transparent methodology
What the estimate includes
Scale request volume
Input cost and output cost form a per-request estimate. Requests per day multiplied by working days produces the monthly volume; twelve equal months produces the annual figure.
Check the constraints
Input plus requested output is compared with the context window. Output is also checked independently when the provider publishes a separate maximum.
Common questions
AI API pricing FAQ
How is monthly AI API cost calculated?
The calculator multiplies the selected model's published per-million-token input and output rates by your tokens per request, then multiplies the request estimate by requests per working day and working days per month. The yearly figure uses twelve equal months.
Are cached input tokens added to regular input tokens?
No. Cached input is treated as a subset of the total input. The cached subset receives a published cached-input rate when one is recorded; otherwise it receives the ordinary input rate.
Does Batch always cost half as much?
No. Batch mode appears only when the model registry contains official Batch input and output rates. The calculator does not assume a percentage discount, combine Batch with a cached-input discount, or infer missing prices.
Does the estimate include every provider fee?
No. It covers the recorded text-token prices only. Taxes, regional pricing, minimum commitments, long-context tiers, storage, searches, grounding, tools, fine-tuning, media, partner platforms, and other feature charges may change the actual bill.