GPT-5.5 API Pricing
OpenAI · Frontier · Proprietary · released 2026-04. Prices in USD per 1 million tokens. Data snapshot: 2026-08-14.
- Input: $5.00 per 1M tokens
- Output: $30.00 per 1M tokens
- Batch API (input/output): $2.50 / $15.00
- Prompt-cache read: $0.50
- Context window: 1M
- Arena ELO: 1468 (as of 2026-08-13)
- Available on: Direct API, Azure AI Foundry, OpenRouter (curated by hand — verify with the provider)
Cost per request by business use case
List price vs optimized (prompt caching on the cached input share, batch API for async workloads — only where the provider publishes those rates).
| Use case | Tokens (in/out) | Cost/req (list) | Cost/req (optimized) | Monthly @100K req |
|---|---|---|---|---|
| Support Ticket | 1,500 / 500 | $0.022 | $0.018 | $1.8K |
| Knowledge Q&A | 2,000 / 800 | $0.034 | $0.028 | $2.8K |
| Meeting Summary | 10,000 / 1,200 | $0.086 | $0.041 | $4.1K |
| Marketing Content | 2,500 / 1,800 | $0.067 | $0.064 | $6.4K |
| Coding Task | 3,000 / 2,000 | $0.075 | $0.068 | $6.8K |
| Invoice Processing | 1,500 / 600 | $0.025 | $0.012 | $1.2K |
| Call Summary | 2,000 / 700 | $0.031 | $0.015 | $1.5K |
| Agent Workflow | 6,000 / 3,000 | $0.120 | $0.101 | $10.1K |
These are list prices — real cost also depends on caching, batching, negotiated discounts, marketplace agreements, and existing contracts. Get a FinOps review from OptimNow or compare all models.