GPT-5.5 Pro API pricing — what it really costs
GPT-5.5 Pro (OpenAI) costs $30 per 1M input tokens and $180 per 1M output tokens. Prices verified 2026-07-05; we track the price you are actually billed today, including promotional rates.
Price per 1M tokens
| Input | Output | Cached input |
|---|---|---|
| $30 | $180 | — |
Real monthly costs on GPT-5.5 Pro
Three realistic workloads, computed from the prices above (cached share billed at the cache-read rate where the provider offers one):
Customer-support chatbot
$150/mo
2M input + 0.5M output tokens/month, 60% of input served from prompt cache
RAG / document Q&A
$780/mo
20M input + 1M output tokens/month, 70% cached (shared context)
Agentic coding assistant
$2400/mo
50M input + 5M output tokens/month, 80% cached (long sessions)
Want exact numbers for your usage? Open the calculator — same verified prices, your token volumes.
Compare GPT-5.5 Pro
FAQ
How much does the GPT-5.5 Pro API cost?
GPT-5.5 Pro costs $30 per 1M input tokens and $180 per 1M output tokens. Pricing verified 2026-07-05.
What does a typical workload cost on GPT-5.5 Pro?
Customer-support chatbot: about $150/month (2M input + 0.5M output tokens/month, 60% of input served from prompt cache). RAG / document Q&A: about $780/month (20M input + 1M output tokens/month, 70% cached (shared context)). Agentic coding assistant: about $2400/month (50M input + 5M output tokens/month, 80% cached (long sessions))
Is GPT-5.5 Pro expensive compared to other models?
GPT-5.5 Pro ranks #15 of 15 models by blended price in our comparison. The cheapest tracked model is DeepSeek V4 Flash at $0.140/$0.280 per 1M tokens.