100,000 GPT-5.1 tokens cost $0.125 as input or $1.00 as output. Most workloads land in between — a 70/30 input/output split costs about $0.3875. Verified Aug 16, 2026
Interactive calculator
100,000 in · 0 out
Input price
$1.25 / 1M tokens
Output price
$10.00 / 1M tokens
Uncached pricing. Add caching and monthly projections in the full calculator.
What 100,000 tokens buys in practice
$0.30
80% input / 20% output — short replies over conversation history.
$0.2125
90% input / 10% output — long retrieved context, grounded answers.
$0.1688
95% input / 5% output — full documents in, structured extraction out.
Same 100,000 tokens on other models
70/30 input/output split, uncached.
FAQ
100,000 input tokens cost $0.125; 100,000 output tokens cost $1.00. A typical 70/30 input/output mix costs about $0.3875. Rates: $1.25/M input, $10.00/M output.
A chat-style request of ~4,800 tokens (4,000 in + 800 out) means 100,000 tokens is roughly 21 requests. For a RAG workload with ~8,500 tokens per request, about 12 requests.
Yes — cached input costs $0.125/M instead of $1.25/M, a 90% discount on repeated context.