OpenAIGPT-5.4 Mini pricing
$0.75 per 1M input tokens and $4.50 per 1M output tokens. In real work that is 0.53¢ per chat answer and 1.2¢ to summarize a 20-page PDF.
Official price at OpenAI: $0.75 / $4.50 per 1M, cached $0.075 (source, verified Oct 18, 2026).
What GPT-5.4 Mini costs per task
Token counts estimated from a measured model of the same lab (GPT-6 Luna), rescaled by tokenizer. Reasoning tokens are billed as output.
| Task | Cost | Tokens used | Price rank | Basis |
|---|---|---|---|---|
| Answer a chat question | 0.53¢$5.34 / 1,000 | 45 in · 540 out · 639 reasoning | 226 of 336 | estimated |
| Reply to a customer email | 0.06¢$0.62 / 1,000 | 258 in · 94 out | 121 of 336 | estimated |
| Write a 1,500-word blog post | 1.1¢$10.66 / 1,000 | 59 in · 2,217 out · 143 reasoning | 190 of 336 | estimated |
| Write 10 product descriptions | 0.48¢$4.81 / 1,000 | 283 in · 987 out · 34 reasoning | 148 of 336 | estimated |
| Translate 1,000 words | 0.73¢$7.28 / 1,000 | 1,330 in · 1,328 out · 67 reasoning | 161 of 336 | estimated |
| Proofread one page (500 words) | 0.39¢$3.94 / 1,000 | 718 in · 664 out · 91 reasoning | 206 of 336 | estimated |
| Summarize a 20-page PDF | 1.2¢$12.14 / 1,000 | 12,987 in · 449 out · 84 reasoning | 205 of 336 | estimated |
| Extract data from an invoice | 0.28¢$2.81 / 1,000 | 373 in · 422 out · 140 reasoning | 189 of 336 | estimated |
| Analyze a 200-row spreadsheet | 1.6¢$16.16 / 1,000 | 4,779 in · 456 out · 2,338 reasoning | 143 of 336 | estimated |
| Answer from 5 retrieved documents (RAG) | 0.43¢$4.29 / 1,000 | 3,690 in · 234 out · 104 reasoning | 159 of 336 | estimated |
| Classify 100 support tickets | 0.56¢$5.60 / 1,000 | 1,261 in · 445 out · 590 reasoning | 155 of 336 | estimated |
| Review 500 lines of code | 2.7¢$27.08 / 1,000 | 4,557 in · 337 out · 4,921 reasoning | 221 of 336 | estimated |
| Write a SQL query | 0.36¢$3.61 / 1,000 | 126 in · 266 out · 516 reasoning | 199 of 336 | estimated |
| Run a 50-step coding agent | 32¢$322 / 1,000 | 2,237,500 in · 15,000 out · 7,000 reasoning | 133 of 336 | modeled |
Price at every provider
List prices per 1M tokens (input / output) at each host serving GPT-5.4 Mini through OpenRouter today. Hosts can differ in quantization, context and speed.
| Provider | Input / output | Cached input | Context | Uptime |
|---|---|---|---|---|
OpenAIunknown | $0.38 / $2.25 | $0.037 | 400K | 100% |
 Azureunknown | $0.75 / $4.50 | $0.075 | 400K | 100% |
OpenAIunknown | $0.75 / $4.50 | $0.075 | 400K | 100% |
Azureunknown | $0.82 / $4.95 | $0.083 | 400K | |
OpenAIunknown | $1.50 / $9.00 | $0.15 | 400K |
Price history
First seen in our price history on Mar 23, 2026 at $0.75 input / $4.50 output. The list price has not changed since.
FAQ
How much does GPT-5.4 Mini cost?
GPT-5.4 Mini costs $0.75 per 1 million input tokens and $4.50 per 1 million output tokens, with cached input at $0.075 (list price on Oct 18, 2026). In practice one chat answer costs about 0.53¢ and summarizing a 20-page PDF about 1.2¢.
Where is GPT-5.4 Mini cheapest?
Among 5 providers we track, the lowest list price today is at OpenAI: $0.38 input and $2.25 output per 1M tokens.
Does GPT-5.4 Mini charge for reasoning tokens?
Yes. Reasoning (thinking) tokens are billed as output tokens. That is why the cost per task can be much higher than the visible answer suggests - our task costs include them.
Is the GPT-5.4 Mini cost per task measured or estimated?
Estimated: GPT-5.4 Mini was not run directly. Tokens come from GPT-6 Luna and are rescaled by the tokenizer of OpenAI. Real usage can differ.