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GPT-5.4 Pro vs Gemini 3.1 Pro — Premium vs Mid-Tier
Gemini 3.1 Pro is 93% cheaper on input ($2 vs $30) with 2.5x larger context. Compare OpenAI's most expensive model with Google's best value.
Pricing data verified: Jul 3, 2026
Head-to-Head Comparison
Two very different models at very different price points.
| Model | Provider | Tier | Input (per 1M) | Output (per 1M) | Context |
|---|---|---|---|---|---|
| Gemini 3.1 Pro | Mid | $2.00 | $12.00 | 1M | |
| Gemini 3.5 Flash | Mid | $1.50 | $9.00 | 1M | |
| GPT-5.5 | OpenAI | Premium | $5.00 | $30.00 | 1.05M |
| GPT-5.4 Pro | OpenAI | Premium | $30.00 | $180.00 | 400K |
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See the massive cost difference between these two models for your workload.
Which Should You Choose?
Most Production Workloads
API integrations, chatbots, content generation, general AI tasks.
Maximum Capability Tasks
Complex research, advanced math, multi-step reasoning.
Large Document Processing
Processing long documents, codebases, or datasets.
High-Volume APIs
Processing millions of tokens per day in production.
Startup Budgets
Early-stage teams watching every dollar.
Enterprise Scale
Production workloads with cost sensitivity.
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Frequently Asked Questions
Is GPT-5.4 Pro or Gemini 3.1 Pro cheaper?
Gemini 3.1 Pro is dramatically cheaper. It costs $2.00/$12.00 per 1M tokens while GPT-5.4 Pro costs $30.00/$180.00. That's 93% cheaper on input and 93% cheaper on output. At 1M tokens/month, Gemini 3.1 Pro costs $42 vs GPT-5.4 Pro's $2,100.
What is GPT-5.4 Pro used for?
GPT-5.4 Pro at $30/$180 is OpenAI's most capable model, designed for the most complex reasoning tasks — advanced mathematics, multi-step research, complex code generation. It's 15x more expensive than Gemini 3.1 Pro on input.
When should I use GPT-5.4 Pro vs Gemini 3.1 Pro?
GPT-5.4 Pro ($30/$180) is for tasks requiring absolute maximum capability where cost is secondary. Gemini 3.1 Pro ($2/$12) handles most premium tasks at 93% lower cost with a larger 1M context window. Most users should start with Gemini 3.1 Pro.
Does Gemini 3.1 Pro have a larger context window?
Yes. Gemini 3.1 Pro has a 1M token context window, while GPT-5.4 Pro has 400K. That's 2.5x larger. For tasks requiring processing large documents, codebases, or datasets, Gemini 3.1 Pro offers both lower cost and larger context.
Can I use both models together?
Yes! A cost-effective pattern: use Gemini 3.1 Pro ($2/$12) for 95% of tasks and route only the most complex, high-stakes tasks to GPT-5.4 Pro ($30/$180). This gives you maximum capability where needed while keeping costs 90%+ lower.
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