GPT-5.4 mini: what it costs to run
The price OpenAI lists for GPT-5.4 mini, what a support reply, a document summary and an agent task cost at it, and where that puts it among 37 models.
US dollars per million tokens, standard rate, shortest context band.
- 1,000 support replies
- $4.05
- Cached input
- $0.075
- Context window
- 400,000 tokens
- Released
- 17 Mar 2026
- Weights
- Closed
From OpenAI’s own pages, 22 September 2026.
GPT-5.4 mini costs $0.75 per million input tokens and $4.50 per million output tokens on OpenAI’s own API, and $0.075 for cached input. At those prices 1,000 support replies cost $4.05, the 14th cheapest of 33 priced models on our list.
What a job costs
Three jobs, 1,000 runs of each, at the list price above, and where each puts GPT-5.4 mini among the 33 models with a list price.
| Job | 1,000 runs | Among 33 |
|---|---|---|
| Support reply3,000 in, 400 out. | $4.05 | 14th cheapest |
| Document summary25,000 in, 1,000 out. | $23.25 | 14th cheapest |
| Agent task80,000 in (70,000 cached), 3,000 out. | $26.25 | 12th cheapest |
The token counts are ours, chosen to look like real work; the prices are OpenAI’s. All three jobs stay under 200,000 tokens a request, below every long-context surcharge on the list.
GPT-5.4 mini on real small-business tasks
What the AIGROW benchmark measured when GPT-5.4 mini was given 20 office tasks, each marked pass or fail by fixed checks.
- Success rate
- 40% of 20 runs passed (95% interval 22 to 61%), 30th of 36 models.
- Cost per 1,000 passes
- $3.35, failed runs included.
- Answer time
- 1.7 s median, 2.3 s at the 90th percentile.
- Strongest and weakest
- Email triage (100% passed) and review replies (0%).
The small print
What the base rate above leaves out, copied from the maker’s pages: surcharges, discounts, promotions and cache pricing.
Batch 50% off. Context 400,000 with max input 272K.
GPT-5.4 mini against the models it is weighed with
Each comparison puts both list prices side by side and costs the same three jobs on each.
- vs Claude Haiku 4.5
- Anthropic's current small model against OpenAI's previous mini, at similar list prices.
- vs GPT-5.6 Luna
- The older mini against the newer nano tier, which now costs less than a third as much.
Other OpenAI models
| Model | Input | Output | Context | 1,000 replies |
|---|---|---|---|---|
| GPT-5.6 LunaOpenAI | $0.20 | $1.20 | 1.05M | $1.08 |
| GPT-5.4 nanoOpenAI | $0.20 | $1.25 | 400K | $1.10 |
| GPT-5.6 TerraOpenAI | $2.00 | $12.00 | 1.05M | $10.80 |
| GPT-5.6 SolOpenAI | $4.00 | $20.00 | 1.05M | $20.00 |
| GPT-5.5OpenAI | $5.00 | $30.00 | 1.05M | $27.00 |
| GPT-6 AstraOpenAI | $10.00 | $50.00 | 1.05M | $50.00 |
| gpt-oss-120bOpenAI · open weights | No list price | · | 131K | · |
Where the price comes from
Read on 22 September 2026. Each price is the standard rate for the shortest context band, with no batch or priority discount; long-context surcharges, batch rates and promotions are in each model’s small print. No price was taken from a reseller.
Pay a quarter of list price
AIGROW API credit is metered at the makers’ list prices, and $25 buys $100 of usage. The credit page lists the models it covers; ask about any other before buying.
Prices checked 22 September 2026