Gemini 3.5 Flash-Lite vs GPT-5.5
Detailed pricing comparison and cost analysis.
Updated September 2026
Cost Simulator
| Feature | Gemini 3.5 Flash-Lite | GPT-5.5 |
|---|---|---|
| Provider | OpenAI | |
| Input Price (1M) | $0.30 | $5.00 |
| Output Price (1M) | $2.50 | $30.00 |
| Context Window | 1,000,000 | 1,000,000 |
Verdict
Gemini 3.5 Flash-Lite costs $0.30 per 1M input tokens and $2.50 per 1M output tokens. GPT-5.5 costs $5.00 per 1M input tokens and $30.00 per 1M output tokens. Gemini 3.5 Flash-Lite is 94% cheaper on input tokens than GPT-5.5. For output tokens, Gemini 3.5 Flash-Lite is the more affordable option at $2.50/1M vs $30.00.
On context window, Gemini 3.5 Flash-Lite supports 1,000,000 tokens — meaning it can fit more conversation history, documents, or code in a single request. This matters for RAG pipelines, long document analysis, and agentic workflows where context builds up over many turns.
When to choose Gemini 3.5 Flash-Lite
- ✓ You need the lowest input token cost ($ 0.30/1M)
- ✓ Your workload is output-heavy — Gemini 3.5 Flash-Lite generates text cheaper
- ✓ You are already integrated with Google
When to choose GPT-5.5
- ✓ You are already integrated with OpenAI
Use the calculator above to simulate your specific workload and find the exact break-even point. For most applications, the cheapest model is the one that minimises your total monthly bill given your input-to-output token ratio.
Frequently Asked Questions
Is Gemini 3.5 Flash-Lite cheaper than GPT-5.5? ▼
Gemini 3.5 Flash-Lite is cheaper on input tokens at $0.30/1M vs $5.00/1M for GPT-5.5 — a 94% saving.
What is the context window of Gemini 3.5 Flash-Lite vs GPT-5.5? ▼
Gemini 3.5 Flash-Lite has a 1,000,000-token context window. GPT-5.5 has a 1,000,000-token context window. Gemini 3.5 Flash-Lite supports the larger context, suitable for longer documents and agentic workflows.
Which model is better: Gemini 3.5 Flash-Lite or GPT-5.5? ▼
The best choice depends on your use case. For cost efficiency on input tokens, Gemini 3.5 Flash-Lite is the cheaper option. For maximum context length, Gemini 3.5 Flash-Lite supports 1,000,000 tokens. Use the comparison table above to find the right fit for your workload.