OpenAIreasoningGPT-5 Pro pricing
$15.00 per 1M input tokens and $120.00 per 1M output tokens. In real work that is 8.0¢ per chat answer and 26¢ to summarize a 20-page PDF.
What GPT-5 Pro costs per task
Token counts estimated from a measured model of the same lab (GPT-6.1 Sol), rescaled by tokenizer. Reasoning tokens are billed as output.
| Task | Cost | Tokens used | Price rank | Basis |
|---|---|---|---|---|
| Answer a chat question | 8.0¢$80.23 / 1,000 | 45 in · 560 out · 103 reasoning | 331 of 336 | estimated |
| Reply to a customer email | 1.9¢$18.99 / 1,000 | 258 in · 126 out | 321 of 336 | estimated |
| Write a 1,500-word blog post | 28¢$275 / 1,000 | 59 in · 2,116 out · 172 reasoning | 332 of 336 | estimated |
| Write 10 product descriptions | 15¢$145 / 1,000 | 283 in · 1,103 out · 72 reasoning | 328 of 336 | estimated |
| Translate 1,000 words | 18¢$180 / 1,000 | 1,330 in · 1,289 out · 44 reasoning | 327 of 336 | estimated |
| Proofread one page (500 words) | 9.0¢$90.21 / 1,000 | 718 in · 662 out | 332 of 336 | estimated |
| Summarize a 20-page PDF | 26¢$256 / 1,000 | 12,987 in · 482 out · 26 reasoning | 329 of 336 | estimated |
| Extract data from an invoice | 6.0¢$59.59 / 1,000 | 373 in · 450 out | 329 of 336 | estimated |
| Analyze a 200-row spreadsheet | 97¢$968 / 1,000 | 4,779 in · 919 out · 6,553 reasoning | 331 of 336 | estimated |
| Answer from 5 retrieved documents (RAG) | 11¢$108 / 1,000 | 3,690 in · 442 out | 327 of 336 | estimated |
| Classify 100 support tickets | 8.1¢$81.20 / 1,000 | 1,261 in · 442 out · 77 reasoning | 323 of 336 | estimated |
| Review 500 lines of code | 55¢$546 / 1,000 | 4,557 in · 1,135 out · 2,843 reasoning | 331 of 336 | estimated |
| Write a SQL query | 5.7¢$56.97 / 1,000 | 126 in · 312 out · 147 reasoning | 329 of 336 | estimated |
| Run a 50-step coding agent | $35.36$35,362 / 1,000 | 2,237,500 in · 15,000 out | 330 of 336 | modeled |
Price at every provider
List prices per 1M tokens (input / output) at each host serving GPT-5 Pro through OpenRouter today. Hosts can differ in quantization, context and speed.
| Provider | Input / output | Cached input | Context | Uptime |
|---|---|---|---|---|
OpenAIunknown | $15.00 / $120.00 | - | 400K |
Price history
First seen in our price history on Oct 20, 2025 at $15.00 input / $120.00 output. The list price has not changed since.
FAQ
How much does GPT-5 Pro cost?
GPT-5 Pro costs $15.00 per 1 million input tokens and $120.00 per 1 million output tokens (list price on Oct 18, 2026). In practice one chat answer costs about 8.0¢ and summarizing a 20-page PDF about 26¢.
Where is GPT-5 Pro cheapest?
Among 1 providers we track, the lowest list price today is at OpenAI: $15.00 input and $120.00 output per 1M tokens.
Does GPT-5 Pro 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 Pro cost per task measured or estimated?
Estimated: GPT-5 Pro was not run directly. Tokens come from GPT-6.1 Sol and are rescaled by the tokenizer of OpenAI. Real usage can differ.