GPT-5.4 vs Gemini 3.1 Pro Preview
Complete 2025 Comparison
Side-by-side comparison of GPT-5.4 and Gemini 3.1 Pro Preview. Compare performance, pricing, capabilities, context windows, and more to choose the best AI model for your needs.
Quick Comparison
| Feature | GPT-5.4 | Gemini 3.1 Pro Preview | Winner |
|---|---|---|---|
| Provider | OpenAI | - | |
| Context Window | 1,050,000 tokens | 1,048,576 tokens | GPT-5.4 |
| Output Limit | 128,000 tokens | 65,536 tokens | GPT-5.4 |
| Speed | deep | deep | Tie |
| Input Price | $0.0025/1K tokens | $0.002/1K tokens | Gemini 3.1 Pro Preview |
| Output Price | $0.015/1K tokens | $0.012/1K tokens | Gemini 3.1 Pro Preview |
| Vision Support | Yes | Yes | Both |
| Function Calling | Yes | Yes | Both |
| Reasoning | Yes | Yes | Both |
| Code Generation | Yes | Yes | Both |
| Total Capabilities | 17 | 11 | GPT-5.4 |
| Tier | max | max | - |
Performance Comparison
🚀GPT-5.4
Latest frontier model with breakthrough reasoning, multimodal understanding, and 400K context window. Major advances in agentic coding, instruction following, and creative generation.
🚀Gemini 3.1 Pro Preview
Newest Gemini frontier model with 1M context, stronger long-horizon reasoning, cached context support, and multimodal tool use.
Pricing Comparison
GPT-5.4 Pricing
Gemini 3.1 Pro Preview Pricing
💡 Pro Tip: On JustSimpleChat, you pay the same API rates as going direct to providers, but with the convenience of one unified platform, transparent usage tracking, and the ability to switch between 600+ models instantly.
Capabilities & Features
GPT-5.4 Capabilities
- ✓reasoning
- ✓vision
- ✓multimodal
- ✓analysis
- ✓function calling
- ✓structured output
- ✓web search
- ✓code interpreter
- ✓hosted shell
- ✓apply patch
- ✓skills
- ✓computer use
- ✓mcp
- ✓tool search
- ✓code generation
- ✓thinking mode
- ✓long context
Gemini 3.1 Pro Preview Capabilities
- ✓reasoning
- ✓vision
- ✓function calling
- ✓structured output
- ✓native web search
- ✓multimodal
- ✓analysis
- ✓long context
- ✓tool use
- ✓code generation
- ✓code execution
Which Should You Choose?
🚀Choose GPT-5.4 if you need:
- •Larger context window (1,050,000 vs 1,048,576 tokens) for processing long documents or extensive conversations
- •OpenAI ecosystem integration
🚀Choose Gemini 3.1 Pro Preview if you need:
- •More cost-effective pricing ($0.002 vs $0.0025 per 1K input tokens)
- •Google ecosystem integration
Best of Both Worlds
With JustSimpleChat, you don't have to choose! Access both GPT-5.4 and Gemini 3.1 Pro Previewin the same conversation. Switch models mid-chat, compare responses side-by-side, or let our smart routing automatically select the best model for each task.
Try Both Models FreeFrequently Asked Questions
Which is better, GPT-5.4 or Gemini 3.1 Pro Preview?
The choice between GPT-5.4 and Gemini 3.1 Pro Preview depends on your specific needs. GPT-5.4 has a larger context window (1,050,000 vs 1,048,576 tokens), making it better for long documents. Gemini 3.1 Pro Preview delivers excellent reasoning capabilities. Try both on JustSimpleChat to see which fits your workflow.
Is GPT-5.4 faster than Gemini 3.1 Pro Preview?
Speed comparison: GPT-5.4 is rated as "deep" while Gemini 3.1 Pro Preview is rated as "deep". Both models offer similar response times. However, actual speed can vary based on request complexity, server load, and the specific task being performed.
Which costs less, GPT-5.4 or Gemini 3.1 Pro Preview?
Pricing comparison: GPT-5.4 costs $0.0025/1K input tokens and $0.015/1K output tokens, while Gemini 3.1 Pro Preview costs $0.002/1K input and $0.012/1K output. Gemini 3.1 Pro Preview is more affordable for input processing. On JustSimpleChat, you can access both models with transparent usage tracking and flexible pricing plans.
Does GPT-5.4 have a larger context window than Gemini 3.1 Pro Preview?
Context window comparison: GPT-5.4 supports 1,050,000 input tokens, while Gemini 3.1 Pro Preview supports 1,048,576 tokens. GPT-5.4 has a 0% larger context window, making it better for processing long documents, entire codebases, or extensive conversations.
Which is better for coding, GPT-5.4 or Gemini 3.1 Pro Preview?
For coding tasks: Both GPT-5.4 and Gemini 3.1 Pro Preview support code generation. Gemini 3.1 Pro Preview includes code execution capabilities for interactive development. Test both on JustSimpleChat with your actual code to find the best fit.
Can I use both GPT-5.4 and Gemini 3.1 Pro Preview on JustSimpleChat?
Yes! JustSimpleChat provides access to both GPT-5.4 and Gemini 3.1 Pro Preview, along with 600+ other AI models. You can switch between models mid-conversation, compare responses side-by-side, or let our smart routing automatically select the best model for each task. Start with our free tier to try both models, or upgrade for higher usage limits and additional features.
What are the main differences between GPT-5.4 and Gemini 3.1 Pro Preview?
Key differences: 1) Context Window: GPT-5.4 (1,050,000 tokens) vs Gemini 3.1 Pro Preview (1,048,576 tokens). 2) Speed: deep vs deep. 3) Capabilities: GPT-5.4 supports reasoning, vision, multimodal, analysis, function_calling, structured_output, web_search, code_interpreter, hosted_shell, apply_patch, skills, computer_use, mcp, tool_search, code_generation, thinking_mode, long_context, while Gemini 3.1 Pro Preview supports reasoning, vision, function_calling, structured_output, native_web_search, multimodal, analysis, long_context, tool_use, code_generation, code_execution. 4) Provider: OpenAI vs Google. 5) Use Cases: GPT-5.4 excels at latest frontier model with breakthrough reasoning, multimodal understanding, and 400k context window. major advances in agentic coding, instruction following, and creative generation., while Gemini 3.1 Pro Preview is optimized for newest gemini frontier model with 1m context, stronger long-horizon reasoning, cached context support, and multimodal tool use..
How do I choose between GPT-5.4 and Gemini 3.1 Pro Preview?
Choose GPT-5.4 if you need a larger context window for long documents. Choose Gemini 3.1 Pro Preview if you prioritize multimodal understanding with vision. The best way to decide is to try both on JustSimpleChat with your actual use cases.
Is GPT-5.4 or Gemini 3.1 Pro Preview better for business use?
For business applications: GPT-5.4 is designed for enterprise use with 1,050,000 token context and advanced features. Consider factors like context window (GPT-5.4: 1,050,000, Gemini 3.1 Pro Preview: 1,048,576), pricing, and specific capabilities. JustSimpleChat offers team plans with both models, centralized billing, and usage analytics.
Can I compare GPT-5.4 and Gemini 3.1 Pro Preview side-by-side?
Yes! On JustSimpleChat, you can compare GPT-5.4 and Gemini 3.1 Pro Preview side-by-side by using our model comparison feature. Send the same prompt to both models simultaneously and see how they respond. This helps you understand their different strengths, response styles, and performance characteristics for your specific use cases. Available on all plans including free tier.
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