Comparison
GPT-5.4 mini vs GPT-5.5
GPT-5.4 mini costs 85% less per input token than GPT-5.5. GPT-5.4 mini is 85% cheaper on output tokens. GPT-5.5 has the larger context window than GPT-5.4 mini.
| Field | GPT-5.4 mini | GPT-5.5 |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Context window | 400K | 1.1M |
| Max output | 128K | 128K |
| Input / 1M | $0.7585% cheaper | $5.00 |
| Output / 1M | $4.5085% cheaper | $30.00 |
| Cached input / 1M | $0.07585% cheaper | $0.50 |
| Batch discount | 50% | 50% |
| Release date | 2026-03-17 | 2026-04-23 |
Worked cost examples
Estimated monthly cost on three common usage shapes
| Workload | GPT-5.4 mini | GPT-5.5 |
|---|---|---|
Chatbot 800 input / 200 output tokens per request, 100,000 requests/month | $150.00cheaper | $1,000 |
RAG pipeline 6,000 input / 700 output tokens per request, 30,000 requests/month | $229.50cheaper | $1,530 |
Batch summarization 20,000 input / 1,500 output tokens per request, 5,000 requests/month | $108.75cheaper | $725.00 |
GPT-5.4 mini vs GPT-5.5 FAQ
- Is GPT-5.4 mini cheaper than GPT-5.5?
- GPT-5.4 mini costs $0.75 per 1M input tokens versus $5.00 for GPT-5.5 — GPT-5.4 mini is 85% cheaper per input token.
- Which is cheaper for output tokens, GPT-5.4 mini or GPT-5.5?
- GPT-5.4 mini charges $4.50 per 1M output tokens; GPT-5.5 charges $30.00 per 1M output tokens.
- Which has the larger context window, GPT-5.4 mini or GPT-5.5?
- GPT-5.5 does, with a 1,050,000-token context window.
- Do GPT-5.4 mini and GPT-5.5 offer cache pricing?
- GPT-5.4 mini discounts cached input to $0.075 per 1M tokens. GPT-5.5 discounts cached input to $0.50 per 1M tokens.
Looking for another matchup? See all comparisons.