GPT-6 Astra API cost calculator
GPT-6 Astra (OpenAI) is priced at $10 per million input tokens, $1 for cached input, and $50 per million output tokens — half that through the Batch API. Verified 2026-09-17 against OpenAI's pricing page.
What GPT-6 Astra costs for common workloads
| Workload | Per request | Per day | Per month |
|---|---|---|---|
| Support chatbotShort turns with a reused system prompt — 3k in, 400 out, 60% cached. | $0.034 | $169 | $5,070 |
| RAG over documentsRetrieved context dominates — 12k in, 500 out, 30% cached. | $0.113 | $169 | $5,067 |
| Coding agentGrowing context every turn — 20k in, 1.5k out, 80% cached. | $0.131 | $393 | $11,790 |
| Batch classificationTiny prompts at volume through the Batch API — 800 in, 20 out. | $0.0045 | $900 | $27,000 |
Its blast radius when an agent loops
The coding-agent workload above at 30 requests a minute — $236 an hour — priced at each point a team usually finds out:
Hourly alert
$236
Next morning
$5,659
After a weekend
$14,148
Monthly invoice
$169,776