Gemini 3.1 Flash-Lite vs o4 Mini
Complete pricing and performance comparison between Google's Gemini 3.1 Flash-Lite and OpenAI's o4 Mini.
Quick Verdict
Cheaper
Gemini 3.1 Flash-Lite
4.4x cheaper input, 2.9x cheaper output
Larger Context
Gemini 3.1 Flash-Lite
1.0M vs 200K
Higher Quality
Gemini 3.1 Flash-Lite
Score: 34 vs 33
Faster
Gemini 3.1 Flash-Lite
230 vs 148 tok/s
Pricing Comparison
| Spec | Gemini 3.1 Flash-Lite | o4 Mini | Difference |
|---|---|---|---|
| Provider | OpenAI | ||
| Input / 1M tokens | $0.25 | $1.1 | Gemini 3.1 Flash-Lite is 77% more expensive |
| Output / 1M tokens | $1.5 | $4.4 | Gemini 3.1 Flash-Lite is 66% more expensive |
| Context Window | 1.0M | 200K | 5x difference |
| Max Output | 66K | 100K | |
| Tokenizer | cl100k_base | o200k_base |
Performance Benchmarks
| Metric | Gemini 3.1 Flash-Lite | o4 Mini | Winner |
|---|---|---|---|
| Quality Index | 34 | 33 | Gemini 3.1 Flash-Lite |
| Output Speed | 230 tok/s | 148 tok/s | Gemini 3.1 Flash-Lite |
| Time to First Token | 5.17s | 17.25s | Gemini 3.1 Flash-Lite |
| Value (Quality/$) | 134.0 | 30.1 | Higher = better value |
Benchmark data from Artificial Analysis. Quality Index is a composite score across reasoning, coding, and knowledge tasks.
Cost at Scale
Estimated cost at different usage levels (3:1 input-to-output token ratio, typical for chat).
| Usage | Gemini 3.1 Flash-Lite | o4 Mini | Savings |
|---|---|---|---|
Single request 1K in / 300 out | $0.0007 | $0.0024 | Gemini 3.1 Flash-Lite saves $0.0017 |
10 requests 10K in / 3K out | $0.0070 | $0.024 | Gemini 3.1 Flash-Lite saves $0.017 |
100 requests 100K in / 30K out | $0.070 | $0.242 | Gemini 3.1 Flash-Lite saves $0.172 |
1,000 requests 1M in / 300K out | $0.700 | $2.42 | Gemini 3.1 Flash-Lite saves $1.72 |
10,000 requests 10M in / 3M out | $7.00 | $24.20 | Gemini 3.1 Flash-Lite saves $17.20 |
1M requests/mo 1B in / 300M out | $700.00 | $2420.00 | Gemini 3.1 Flash-Lite saves $1720.00 |
Pros & Cons
Gemini 3.1 Flash-Lite Strengths
- +Cheaper input tokens
- +Cheaper output tokens
- +Larger context window (1.0M vs 200K)
- +Faster output (230 vs 148 tok/s)
- +Higher quality score (34 vs 33)
- +Lower latency (faster first token)
o4 Mini Strengths
- +Higher max output tokens
When to Use Each Model
Choose Gemini 3.1 Flash-Lite for
- →Budget-conscious projects where cost is the primary factor
- →Long documents, large codebases, or multi-turn conversations
- →Tasks requiring maximum accuracy and reasoning
- →Real-time applications, chat, or autocomplete
Choose o4 Mini for
- →Generating long-form content or detailed code
Frequently Asked Questions
Which is cheaper, Gemini 3.1 Flash-Lite or o4 Mini?
For input tokens, Gemini 3.1 Flash-Lite is 4.4x cheaper at $0.25/1M tokens. For output tokens, Gemini 3.1 Flash-Lite is 2.9x cheaper at $1.5/1M tokens. At typical usage (1M input + 300K output), Gemini 3.1 Flash-Lite costs $0.700 vs o4 Mini at $2.42.
What's the context window difference?
Gemini 3.1 Flash-Lite supports 1.0M context (1,048,576 tokens), while o4 Mini supports 200K (200,000 tokens). Gemini 3.1 Flash-Lite can handle 5x more context in a single request.
Which model has better benchmarks?
Quality Index: Gemini 3.1 Flash-Lite scores 34 vs o4 Mini at 33. Speed: Gemini 3.1 Flash-Lite generates 230 tok/s vs o4 Mini at 148 tok/s. Time to first token: Gemini 3.1 Flash-Lite at 5.17s vs o4 Mini at 17.25s.
When should I choose Gemini 3.1 Flash-Lite over o4 Mini?
Choose Gemini 3.1 Flash-Lite when you need: Cheaper input tokens, Cheaper output tokens, Larger context window (1.0M vs 200K), Faster output (230 vs 148 tok/s), Higher quality score (34 vs 33), Lower latency (faster first token). Choose o4 Mini when you need: Higher max output tokens.
How much would 10,000 API requests cost?
At 1K input + 300 output tokens per request (typical chat): Gemini 3.1 Flash-Lite = $7.00, o4 Mini = $24.20. At 10K input + 1K output per request (longer conversations): Gemini 3.1 Flash-Lite = $40.00, o4 Mini = $154.00.
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