GPT-5.6 Sol API cost calculator
GPT-5.6 Sol (OpenAI) is priced at $4 per million input tokens, $0.4 for cached input, and $20 per million output tokens — half that through the Batch API. Verified 2026-09-17 against OpenAI's pricing page.
What GPT-5.6 Sol 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. | $0.014 | $67.60 | $2,028 |
| RAG over documentsRetrieved context dominates — 12k in, 500 out, 30% cached. | $0.045 | $67.56 | $2,027 |
| Coding agentGrowing context every turn — 20k in, 1.5k out, 80% cached. | $0.052 | $157 | $4,716 |
| Batch classificationTiny prompts at volume through the Batch API — 800 in, 20 out. | $0.0018 | $360 | $10,800 |
Its blast radius when an agent loops
The coding-agent workload above at 30 requests a minute — $94.32 an hour — priced at each point a team usually finds out:
Hourly alert
$94.32
Next morning
$2,264
After a weekend
$5,659
Monthly invoice
$67,910