gpt-5.5-pro · OpenAI
High-compute tier of GPT-5.5 delivering expanded compute budget per token for rigorous legal and financial analysis.
Last checked Aug 19, 2026. Calculations use the listed base rates; provider-specific tiers, cache writes, batch pricing, and long-context rules may differ. Confirm the current rate at the official provider source.
Input
$30.00
per 1M tokens
Output
$180.00
per 1M tokens
Cached input
$3.00
per 1M tokens
Context window
512K
max output 64K
GPT-5.5 Pro cost calculator
What GPT-5.5 Pro costs per task
| Use case | Input tokens | Output tokens | Cost / request | Monthly @ 1K req/day |
|---|---|---|---|---|
| Customer support chatbot | 3,500 | 350 | $0.1019 | $3,055.50 |
| RAG / search-augmented answers | 8,000 | 500 | $0.222 | $6,660.00 |
| AI coding assistant | 12,000 | 2,000 | $0.5256 | $15,768.00 |
| Document summarization | 25,000 | 600 | $0.7905 | $23,715.00 |
| Agentic workflow | 40,000 | 1,500 | $0.768 | $23,040.00 |
| Content generation | 800 | 1,200 | $0.2335 | $7,005.60 |
| Data extraction & tagging | 2,000 | 250 | $0.0942 | $2,826.00 |
| Translation | 5,000 | 5,500 | $1.12 | $33,592.50 |
Assumes each use case's typical cacheable share of input. See full cost scenarios.
Compare with alternatives
| Model | Input /M | Output /M | Context | Chat request* |
|---|---|---|---|---|
| GPT-5.5 Pro | $30.00 | $180.00 | 512K | $0.21 |
| GPT-5.6 Sol | $5.00 | $30.00 | 1.1M | $0.035 |
| GPT-5.6 Terra | $2.00 | $12.00 | 1.1M | $0.014 |
| GPT-5.6 Luna | $0.20 | $1.20 | 1.1M | $0.0014 |
| GPT-5.6 Cyber | $12.50 | $75.00 | 1.1M | $0.0875 |
| GPT-5.5 Standard | $5.00 | $30.00 | 512K | $0.035 |
| GPT-5.4 Workhorse | $2.50 | $15.00 | 256K | $0.0175 |
| GPT-5.4 mini | $0.75 | $4.50 | 256K | $0.00525 |
| GPT-5.4 nano | $0.20 | $1.25 | 128K | $0.00144 |
*4,000 in + 800 out tokens, 50% cached input where available.
Related calculations
FAQ
GPT-5.5 Pro costs $30.00 per 1M input tokens and $180.00 per 1M output tokens, with cached input at $3.00 per 1M tokens. Verified Aug 19, 2026 against https://openai.com/api/pricing.
GPT-5.5 Pro supports a 512,000-token context window with up to 64,000 output tokens per request, tokenized with o200k_base.
At $30.00/M input and $180.00/M output, GPT-5.5 Pro sits above GPT-5.6 Sol ($5.00/M in, $30.00/M out) — see the comparison table for full-workload differences.