openai
OpenAI: GPT-5.1 (batch) API Pricing
OpenAI: GPT-5.1 (batch) costs $0.625 per 1M input tokens and $5.00 per 1M output tokens (cache reads: $0.063). Context window: 400K. Prices verified 2026-08-23 Β· source
Input / 1M tokens
$0.625
Output / 1M tokens
$5.00
Context window
400K
Max output
128K
What would OpenAI: GPT-5.1 (batch) cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $25.00 |
| Coding agent | 5,000 | 8,000 / 2,000 | $75.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $150.00 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $35.00 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About OpenAI: GPT-5.1 (batch)
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...
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