Gemini 2.5 Pro vs o4-mini— Pricing & Token Cost Comparison
Side-by-side API pricing and tokenizer details for Gemini 2.5 Pro (Google) and o4-mini (OpenAI).
Side-by-side pricing
| Feature | Gemini 2.5 Pro | o4-mini |
|---|---|---|
| Provider | OpenAI | |
| Input (per 1M tokens) | $1.25 | $1.10 |
| Output (per 1M tokens) | $10.00 | $4.40 |
| Context caching | No | No |
| Batch API discount | Not available | 50% off |
| Context window | 1M tokens | 200K tokens |
| Tokenizer | Gemini tokenizer | o200k_base (tiktoken) |
Real-world cost example
1,000 API requests per month, each with 500 input tokens and 200 output tokens (500K input + 200K output total).
Gemini 2.5 Pro
$2.6250
Input: $0.6250 + Output: $2.0000
o4-mini
$1.4300
Input: $0.5500 + Output: $0.8800
o4-mini is 46% cheaper for this workload — saving $1.1950 per month at this volume.
Frequently asked questions
- Is Gemini 2.5 Pro cheaper than o4-mini?
- No, o4-mini is cheaper for the typical workload above. At $1.10/1M input and $4.40/1M output tokens, it costs $1.4300 versus $2.6250 for Gemini 2.5 Pro — a 46% difference.
- What is the context window of Gemini 2.5 Pro vs o4-mini?
- Gemini 2.5 Pro supports a 1M token context window. o4-mini supports a 200K token context window. A larger context window lets you include more text — documents, conversation history, or code — in a single API call.
- Do Gemini 2.5 Pro or o4-mini support context caching or batch discounts?
- Gemini 2.5 Pro does not support context caching. It does not offer a batch API discount. o4-mini does not support context caching. It offers a 50% Batch API discount.
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