Comparison
Gemini 3.1 Pro Preview vs GPT-5.5
GPT-5.5 charges 60% more per input token than Gemini 3.1 Pro Preview. On generated (output) tokens, GPT-5.5 costs 60% more than Gemini 3.1 Pro Preview.
| Field | Gemini 3.1 Pro Preview | GPT-5.5 |
|---|---|---|
| Provider | OpenAI | |
| Context window | — | 1.1M |
| Max output | — | 128K |
| Input / 1M | $2.0060% cheaper | $5.00 |
| Output / 1M | $12.0060% cheaper | $30.00 |
| Cached input / 1M | $0.2060% cheaper | $0.50 |
| Batch discount | 50% | 50% |
| Release date | — | 2026-04-23 |
Worked cost examples
Estimated monthly cost on three common usage shapes
| Workload | Gemini 3.1 Pro Preview | GPT-5.5 |
|---|---|---|
Chatbot 800 input / 200 output tokens per request, 100,000 requests/month | $400.00cheaper | $1,000 |
RAG pipeline 6,000 input / 700 output tokens per request, 30,000 requests/month | $612.00cheaper | $1,530 |
Batch summarization 20,000 input / 1,500 output tokens per request, 5,000 requests/month | $290.00cheaper | $725.00 |
Gemini 3.1 Pro Preview vs GPT-5.5 FAQ
- Is Gemini 3.1 Pro Preview cheaper than GPT-5.5?
- Gemini 3.1 Pro Preview costs $2.00 per 1M input tokens versus $5.00 for GPT-5.5 — Gemini 3.1 Pro Preview is 60% cheaper per input token.
- Which is cheaper for output tokens, Gemini 3.1 Pro Preview or GPT-5.5?
- Gemini 3.1 Pro Preview charges $12.00 per 1M output tokens; GPT-5.5 charges $30.00 per 1M output tokens.
- Do Gemini 3.1 Pro Preview and GPT-5.5 offer cache pricing?
- Gemini 3.1 Pro Preview discounts cached input to $0.20 per 1M tokens. GPT-5.5 discounts cached input to $0.50 per 1M tokens.
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