Gemini 2.5 Flash Lite Preview 09-2025 is $4.9 cheaper per 1M input tokens (98% lower; 50x difference).
API cost decision in 10 seconds
🔥GPT-5.5 vs Gemini 2.5 Flash Lite Preview 09-2025
Pick Gemini 2.5 Flash Lite Preview 09-2025 for lower cost; pick GPT-5.5 only if the larger context window matters more.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Gemini 2.5 Flash Lite Preview 09-2025 for lower cost; pick GPT-5.5 only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Gemini 2.5 Flash Lite Preview 09-2025 is estimated at $0.3 vs $20 for GPT-5.5, saving $19.7 (98.5% lower).
Cost-first pickGemini 2.5 Flash Lite Preview 09-2025
Context-first pickGPT-5.5
Sample savings$19.798.5%
10x traffic gap$197
GPT-5.5 has more context, but Gemini 2.5 Flash Lite Preview 09-2025 saves $19.7 on the standard workload. At 10x that traffic, the same price gap is about $197. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Gemini 2.5 Flash Lite Preview 09-2025 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | GPT-5.5 | Gemini 2.5 Flash Lite Preview 09-2025 |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Gemini 2.5 Flash Lite Preview 09-2025 | $40 | $0.7 |
| Balanced workload | 1M input + 1M output | Gemini 2.5 Flash Lite Preview 09-2025 | $35 | $0.5 |
| Output-heavy chatbot | 1M input + 5M output | Gemini 2.5 Flash Lite Preview 09-2025 | $155 | $2.1 |
Gemini 2.5 Flash Lite Preview 09-2025 is $29.6 cheaper per 1M output tokens (98.7% lower; 75x difference).
GPT-5.5 has 1.42K more context (1x larger).
Gemini 2.5 Flash Lite Preview 09-2025 is $19.7 cheaper on the standard workload (98.5% lower).
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
Gemini 2.5 Flash Lite Preview 09-2025 has the lower input price; Gemini 2.5 Flash Lite Preview 09-2025 has the lower output price; GPT-5.5 offers the larger context window. For the 1M input plus 500K output sample, Gemini 2.5 Flash Lite Preview 09-2025 is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $20 for GPT-5.5 and $0.3 for Gemini 2.5 Flash Lite Preview 09-2025.
Choose GPT-5.5 when you care most about larger context window.
Choose Gemini 2.5 Flash Lite Preview 09-2025 when you care most about lower input-token price, and lower output-token price.
- On the standard 1M input plus 500K output workload, Gemini 2.5 Flash Lite Preview 09-2025 is estimated at $0.3 vs $20 for GPT-5.5, saving $19.7 (98.5% lower).
- Gemini 2.5 Flash Lite Preview 09-2025 is $19.7 cheaper on the standard workload (98.5% lower).
- Gemini 2.5 Flash Lite Preview 09-2025 is $4.9 cheaper per 1M input tokens (98% lower; 50x difference).
- Gemini 2.5 Flash Lite Preview 09-2025 is $29.6 cheaper per 1M output tokens (98.7% lower; 75x difference).
- GPT-5.5 has 1.42K more context (1x larger).
| Feature | 🔥GPT-5.5 (OpenAI) | Gemini 2.5 Flash Lite Preview 09-2025 (Google) |
|---|---|---|
| Input Price prompt tokens per 1M | $5 | $0.1 |
| Completion Price per 1M tokens | $30 | $0.4 |
| Sample Workload Cost 1M input + 500K output | $20 | $0.3 |
| Context Window | 1.05M | 1.05M |
| Release Date | ||
| Popularity | #17 | #75 |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Gemini 2.5 Flash Lite Preview 09-2025 | On the standard 1M input plus 500K output workload, Gemini 2.5 Flash Lite Preview 09-2025 is estimated at $0.3 vs $20 for GPT-5.5, saving $19.7 (98.5% lower). |
| High-volume input processing | Gemini 2.5 Flash Lite Preview 09-2025 | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Gemini 2.5 Flash Lite Preview 09-2025 | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | GPT-5.5 | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- gpt-oss-120b (free) can replace GPT-5.5 when lower sample workload cost matters most: $0.
- gpt-oss-20b (free) can replace GPT-5.5 when lower sample workload cost matters most: $0.
- gpt-oss-20b can replace GPT-5.5 when lower sample workload cost matters most: $0.1.
- gpt-oss-120b can replace GPT-5.5 when lower sample workload cost matters most: $0.13.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
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