Last verified 2025-12-18 (left) · 2026-03-06 (right)
Gemini 3 Flash vs GPT-5.4 Pro — Pricing & Capability Comparison
Gemini 3 Flash charges $0.50 per million input tokens and $3.00 per million output tokens. GPT-5.4 Pro comes in at $30.00 / $180.00. Context windows span 1M vs 1.1M tokens respectively.
TL;DR — Quick Comparison
- ✓Gemini 3 Flash is cheaper overall: $3.50 per 1M tokens (in+out) vs $210.00 for GPT-5.4 Pro — saves $206.50 per 1M tokens
- ✓Input pricing: Gemini 3 Flash $0.50/1M vs GPT-5.4 Pro $30.00/1M
- ✓Output pricing: Gemini 3 Flash $3.00/1M vs GPT-5.4 Pro $180.00/1M
- ✓Context window: GPT-5.4 Pro offers more (1.1M vs 1M)
- ✓Use our calculator below to estimate costs for your specific usage pattern
Input price (per 1M)
Gemini 3 Flash
$0.50
GPT-5.4 Pro
$30.00
Gemini 3 Flash leads here
Output price (per 1M)
Gemini 3 Flash
$3.00
GPT-5.4 Pro
$180.00
Gemini 3 Flash leads here
Context window
Gemini 3 Flash
1,000,000 tokens
GPT-5.4 Pro
1,050,000 tokens
GPT-5.4 Pro leads here
Cached input
Gemini 3 Flash
$0.050
GPT-5.4 Pro
Not published
Gemini 3 Flash leads here
Cost comparison for 10K-token workloads
Side-by-side pricing for identical workloads (10,000 total tokens per request) across different distributions.
| Scenario | Gemini 3 Flash | GPT-5.4 Pro | Gemini 3 Flash cached |
|---|---|---|---|
Balanced conversation 50% input · 50% output | $0.0175 | $1.05 | $0.0152 |
Input-heavy workflow 80% input · 20% output | $0.0100 | $0.600 | $0.0064 |
Generation heavy 30% input · 70% output | $0.0225 | $1.35 | $0.0212 |
Cached system prompt 90% cached input · 10% fresh output | $0.0075 | $0.450 | $0.0034 |
Frequently asked questions
Which is cheaper: Gemini 3 Flash or GPT-5.4 Pro?
Gemini 3 Flash is cheaper for input tokens at $0.50 per 1M tokens compared to $30.00. For output, Gemini 3 Flash costs $3.00 per 1M tokens versus $180.00 for GPT-5.4 Pro.
What is the cost per 1M tokens for Gemini 3 Flash?
Gemini 3 Flash pricing: $0.50 per 1M input tokens and $3.00 per 1M output tokens. Context window: 1,000,000 tokens.
What is the cost per 1M tokens for GPT-5.4 Pro?
GPT-5.4 Pro pricing: $30.00 per 1M input tokens and $180.00 per 1M output tokens. Context window: 1,050,000 tokens.
How much does it cost per 1K tokens?
Per 1K tokens: Gemini 3 Flash costs $0.0005 input / $0.0030 output. GPT-5.4 Pro costs $0.0300 input / $0.1800 output. This is useful for calculating small-scale usage costs.
Which model supports a larger context window?
GPT-5.4 Pro offers 1,050,000 tokens (1.1M) versus 1M for Gemini 3 Flash.
What is the estimated monthly cost for typical usage?
For a typical workload of 10M input + 2M output tokens per month: Gemini 3 Flash would cost approximately $11.00, while GPT-5.4 Pro would cost $660.00. Gemini 3 Flash is more economical for this usage pattern.
Do these models support prompt caching?
Gemini 3 Flash supports prompt caching at $0.050 per 1M cached tokens, reducing costs for repeated context by up to 90%. GPT-5.4 Pro does not publish cached pricing.
Which model is best for my use case?
Choose Gemini 3 Flash for cost-sensitive applications with high input volume. Choose GPT-5.4 Pro if you need 1.1M context for long documents or conversations. Consider prompt caching if you have repeated context. Use our token calculator to model your specific usage pattern.