Gemini 3.1 Pro vs GPT-5.4 Mini
Complete pricing and performance comparison between Google's Gemini 3.1 Pro and OpenAI's GPT-5.4 Mini.
Quick Verdict
Cheaper
GPT-5.4 Mini
2.7x cheaper input, 2.7x cheaper output
Larger Context
Gemini 3.1 Pro
1.0M vs 400K
Pricing Comparison
| Spec | Gemini 3.1 Pro | GPT-5.4 Mini | Difference |
|---|---|---|---|
| Provider | OpenAI | ||
| Input / 1M tokens | $2 | $0.75 | GPT-5.4 Mini is 63% more expensive |
| Output / 1M tokens | $12 | $4.5 | GPT-5.4 Mini is 63% more expensive |
| Context Window | 1.0M | 400K | 3x difference |
| Max Output | 66K | 128K | |
| Tokenizer | cl100k_base | o200k_base |
Performance Benchmarks
| Metric | Gemini 3.1 Pro | GPT-5.4 Mini | Winner |
|---|---|---|---|
| Quality Index | 57 | -- | N/A |
| Output Speed | 120 tok/s | -- | N/A |
| Value (Quality/$) | 28.6 | -- | 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 Pro | GPT-5.4 Mini | Savings |
|---|---|---|---|
Single request 1K in / 300 out | $0.0056 | $0.0021 | GPT-5.4 Mini saves $0.0035 |
10 requests 10K in / 3K out | $0.056 | $0.021 | GPT-5.4 Mini saves $0.035 |
100 requests 100K in / 30K out | $0.560 | $0.210 | GPT-5.4 Mini saves $0.350 |
1,000 requests 1M in / 300K out | $5.60 | $2.10 | GPT-5.4 Mini saves $3.50 |
10,000 requests 10M in / 3M out | $56.00 | $21.00 | GPT-5.4 Mini saves $35.00 |
1M requests/mo 1B in / 300M out | $5600.00 | $2100.00 | GPT-5.4 Mini saves $3500.00 |
Pros & Cons
Gemini 3.1 Pro Strengths
- +Larger context window (1.0M vs 400K)
GPT-5.4 Mini Strengths
- +Cheaper input tokens
- +Cheaper output tokens
- +Higher max output tokens
When to Use Each Model
Choose Gemini 3.1 Pro for
- →Long documents, large codebases, or multi-turn conversations
Choose GPT-5.4 Mini for
- →Budget-conscious projects where cost is the primary factor
- →Generating long-form content or detailed code
Frequently Asked Questions
Which is cheaper, Gemini 3.1 Pro or GPT-5.4 Mini?
For input tokens, GPT-5.4 Mini is 2.7x cheaper at $0.75/1M tokens. For output tokens, GPT-5.4 Mini is 2.7x cheaper at $4.5/1M tokens. At typical usage (1M input + 300K output), Gemini 3.1 Pro costs $5.60 vs GPT-5.4 Mini at $2.10.
What's the context window difference?
Gemini 3.1 Pro supports 1.0M context (1,048,576 tokens), while GPT-5.4 Mini supports 400K (400,000 tokens). Gemini 3.1 Pro can handle 3x more context in a single request.
Which model has better benchmarks?
When should I choose Gemini 3.1 Pro over GPT-5.4 Mini?
Choose Gemini 3.1 Pro when you need: Larger context window (1.0M vs 400K). Choose GPT-5.4 Mini when you need: Cheaper input tokens, Cheaper output tokens, 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 Pro = $56.00, GPT-5.4 Mini = $21.00. At 10K input + 1K output per request (longer conversations): Gemini 3.1 Pro = $320.00, GPT-5.4 Mini = $120.00.
Related Comparisons
GPT-5.4 vs GPT-5.4 Mini
$2.5 vs $0.75 per 1M input
Gemini 3.1 Pro vs GPT-5.4
$2 vs $2.5 per 1M input
GPT-5.4 Mini vs GPT-5.4 Nano
$0.75 vs $0.2 per 1M input
GPT-5 vs GPT-5.4 Mini
$1.25 vs $0.75 per 1M input
GPT-5.4 Mini vs GPT-5 Mini
$0.75 vs $0.25 per 1M input
GPT-5.4 Mini vs o4 Mini
$0.75 vs $1.1 per 1M input