Gemini 3.1 Flash-Lite
$147.50 / month- Input cost
- $87.50
- Output cost
- $60.00
- Per 1,000 calls
- $0.295
- Pricing profile
- standard
Source-tracked model comparison
Gemini 3.1 Flash-Lite vs GPT-4o Mini: which has lower classification API cost?
Compare verified pricing and model limits for high-volume classification across compact Google and OpenAI models. The cost example uses a classification and routing workload and does not assume equal model quality.
Direct cost answer: Gemini 3.1 Flash-Lite is estimated at $147.50 per month and GPT-4o mini at $76.50 for 700 input tokens, 80 output tokens, and 500,000 monthly requests. GPT-4o mini is $71.00 lower under these assumptions. This does not identify a quality winner.
Tracked facts
Pricing and model limits
Prices are USD per 1M tokens under each model's verified default profile.
| Field | Gemini 3.1 Flash-Lite | GPT-4o mini |
|---|---|---|
| Provider | OpenAI | |
| API model ID | gemini-3.1-flash-lite | gpt-4o-mini |
| Input / 1M | $0.25 | $0.15 |
| Cached input / 1M | $0.025 | $0.075 |
| Output / 1M | $1.50 | $0.60 |
| Context window | 1,048,576 tokens | 128,000 tokens |
| Maximum output | 65,536 tokens | 16,384 tokens |
| Accepted input | text, image, audio | text, image |
Example workload
Classification and routing cost scenario
700 input and 80 output tokens per request, 500,000 monthly requests, and 0% cached input.
GPT-4o mini
$76.50 / month- Input cost
- $52.50
- Output cost
- $24.00
- Per 1,000 calls
- $0.153
- Pricing profile
- standard
Cost result: GPT-4o mini is $71.00 lower per month for these assumptions. This is a price comparison, not a model-quality ranking.
Questions to answer before choosing
- Which model reaches the target classification accuracy?
- How many cases require escalation?
- Do provider controls or regions constrain the choice?
What this estimate leaves out
Quality and latency are not assumed equal across models; validate labels on a representative evaluation set.
Latency, reliability, output quality, retries, regional processing, and provider-specific tool charges can change the practical decision.
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