GPT-5 Nano pricing
OpenAI ·
gpt-5-nano ·
272K context
· 3rd cheapest of 89 current models
Estimate GPT-5 Nano for your workload Source and check date
Rates last checked against the vendor’s own published pricing on 2026-11-10.
What GPT-5 Nano costs
| Rate | Per 1M tokens | Per 1K tokens | What it covers |
|---|---|---|---|
| Input | $0.05 | $0.00005 | Every token you send: prompt, history, documents. |
| Output | $0.4 | $0.0004 | Every token the model generates, including hidden reasoning tokens. |
| Cached input | $0.005 | $0.000005 | Input served from the provider’s prompt cache. |
What that means in practice
The same three workloads are costed on every model page, so these numbers are directly comparable across the catalog. No prompt caching and no batch discount is assumed — the figures are what you pay before you optimize anything.
Support chatbot
2,500 six-turn conversations a day
$262 / month
$0.0035 per conversation · $3,145 a year
An 800-token system prompt, 400-token questions and 900-token answers, over six turns — each turn re-sending everything before it.
Document summarizer
1,000 single-shot summaries a day
$27.90 / month
$0.00093 per conversation · $335 a year
One 12,000-token document in, an 800-token summary out, no conversation history. The case where input dominates the bill.
Coding agent
200 twelve-turn sessions a day
$167 / month
$0.028 per conversation · $2,009 a year
A 3,000-token system prompt, 1,500-token instructions and 2,500-token responses over twelve turns. Long sessions are where the quadratic cost of re-sent history stops being theoretical.
Change the assumptions in the calculator
Cheaper models in the catalog
Nothing cheaper is scored as highly as GPT-5 Nano, so these are simply the cheaper options, best-scored first. Trading down here is a real trade.
| Model | Input | Output | Blended saving | |
|---|---|---|---|---|
| Nova Micro | $0.035 | $0.14 | 55% | |
| Nova Lite | $0.06 | $0.24 | 24% |
Specification
| Context window | 272K tokens |
|---|---|
| Maximum output | 128K tokens |
| Provider | OpenAI |
| Status | Current |
| Reasoning model | Yes |
| Vision | Yes |
| Token counting | Exact, via o200k_base |
Price history
PromptSpend has recorded GPT-5 Nano since 2026-08-02, and none of its rates has changed in that time. Tracking began on 2026-08-02, so anything the vendor did before then is not on record here.
Every row, with the commit that published it, is in the price-history dataset; price news is also available as an Atom feed.
Where these numbers come from
Last checked against its source on 2026-11-10. Source of record: the vendor’s own published pricing.
The vendor page a human checked
Regional and data-residency premiums, priority tiers, server-side tool fees and negotiated discounts are not included. Prices change without notice; this page is rebuilt every time the catalog does.
Common questions
How much does GPT-5 Nano cost?
GPT-5 Nano costs $0.05 per 1M input tokens and $0.4 per 1M output tokens at the standard tier, as last checked against the vendor’s own published pricing on 2026-11-10.
How much does GPT-5 Nano cost to run for a month?
On PromptSpend's three standard workloads, GPT-5 Nano costs about $262 for a support chatbot, $27.90 for a document summarizer and $167 for a coding agent each month. No prompt caching and no batch discount is assumed, and the same workloads are costed on every model page, so the figures compare directly.
Is there a cheaper alternative to GPT-5 Nano?
Yes, though none is scored as highly. The cheaper options, best-scored first, include Nova Micro ($0.035 in, $0.14 out) and Nova Lite ($0.06 in, $0.24 out), so trading down is a real trade.
How large is the context window of GPT-5 Nano?
GPT-5 Nano accepts up to 272K tokens of context and can produce up to 128K tokens of output.
Has the price of GPT-5 Nano changed?
No vendor change is on record. PromptSpend has recorded GPT-5 Nano since 2026-08-02 and none of its rates has moved. PromptSpend began tracking prices on 2026-08-02, so earlier changes are not on record.
Where do the prices for GPT-5 Nano come from?
They come from the vendor’s own published pricing and were last checked on 2026-11-10. Regional and data-residency premiums, priority tiers, server-side tool fees and negotiated discounts are not included.