Gemini 3 Flash vs GPT-5.4 Mini
Complete pricing and performance comparison between Google's Gemini 3 Flash and OpenAI's GPT-5.4 Mini.
Quick Verdict
Cheaper
Gemini 3 Flash
1.5x cheaper input, 1.5x cheaper output
Larger Context
Gemini 3 Flash
1.0M vs 400K
Pricing Comparison
| Spec | Gemini 3 Flash | GPT-5.4 Mini | Difference |
|---|---|---|---|
| Provider | OpenAI | ||
| Input / 1M tokens | $0.5 | $0.75 | Gemini 3 Flash is 33% more expensive |
| Output / 1M tokens | $3 | $4.5 | Gemini 3 Flash is 33% more expensive |
| Context Window | 1.0M | 400K | 3x difference |
| Max Output | 66K | 128K | |
| Tokenizer | cl100k_base | o200k_base |
Performance Benchmarks
| Metric | Gemini 3 Flash | GPT-5.4 Mini | Winner |
|---|---|---|---|
| Quality Index | 35 | -- | N/A |
| Output Speed | 188 tok/s | -- | N/A |
| Value (Quality/$) | 70.0 | -- | 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 Flash | GPT-5.4 Mini | Savings |
|---|---|---|---|
Single request 1K in / 300 out | $0.0014 | $0.0021 | Same |
10 requests 10K in / 3K out | $0.014 | $0.021 | Gemini 3 Flash saves $0.0070 |
100 requests 100K in / 30K out | $0.140 | $0.210 | Gemini 3 Flash saves $0.070 |
1,000 requests 1M in / 300K out | $1.40 | $2.10 | Gemini 3 Flash saves $0.700 |
10,000 requests 10M in / 3M out | $14.00 | $21.00 | Gemini 3 Flash saves $7.00 |
1M requests/mo 1B in / 300M out | $1400.00 | $2100.00 | Gemini 3 Flash saves $700.00 |
Pros & Cons
Gemini 3 Flash Strengths
- +Cheaper input tokens
- +Cheaper output tokens
- +Larger context window (1.0M vs 400K)
GPT-5.4 Mini Strengths
- +Higher max output tokens
When to Use Each Model
Choose Gemini 3 Flash for
- →Budget-conscious projects where cost is the primary factor
- →Long documents, large codebases, or multi-turn conversations
Choose GPT-5.4 Mini for
- →Generating long-form content or detailed code
Frequently Asked Questions
Which is cheaper, Gemini 3 Flash or GPT-5.4 Mini?
For input tokens, Gemini 3 Flash is 1.5x cheaper at $0.5/1M tokens. For output tokens, Gemini 3 Flash is 1.5x cheaper at $3/1M tokens. At typical usage (1M input + 300K output), Gemini 3 Flash costs $1.40 vs GPT-5.4 Mini at $2.10.
What's the context window difference?
Gemini 3 Flash supports 1.0M context (1,048,576 tokens), while GPT-5.4 Mini supports 400K (400,000 tokens). Gemini 3 Flash can handle 3x more context in a single request.
Which model has better benchmarks?
When should I choose Gemini 3 Flash over GPT-5.4 Mini?
Choose Gemini 3 Flash when you need: Cheaper input tokens, Cheaper output tokens, Larger context window (1.0M vs 400K). Choose GPT-5.4 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 Flash = $14.00, GPT-5.4 Mini = $21.00. At 10K input + 1K output per request (longer conversations): Gemini 3 Flash = $80.00, GPT-5.4 Mini = $120.00.
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