GPT-5.4 vs Gemini 3.1 Pro

Comprehensive comparison of OpenAI's GPT-5.4 and Google's Gemini 3.1 Pro. Pricing, specs, benchmarks, use cases, and recommendations.

Quick Verdict

Overall Value
Gemini 3.1 Pro
Best Context
Gemini 3.1 Pro
Close pricingCompare by features
G
GPT-5.4
OpenAI
$2.50 / $15.00
G
Gemini 3.1 Pro
Google
$2.00 / $12.00

Overview

GPT-5.4 (OpenAI) and Gemini 3.1 Pro (Google) represent two different approaches to AI. GPT-5.4 is a gpt5-class model with 256K context, priced at $2.50/$15.00 per 1M tokens. Gemini 3.1 Pro is a gemini-class model with 1M context, priced at $2.00/$12.00 per 1M tokens.

Balanced performance and cost. The recommended model for most production workloads.. Google's current flagship. Best quality for complex reasoning and multimodal tasks.. Both are available through AI API Hub with USDT and USDC payments — no credit card required.

At current pricing, using Gemini 3.1 Pro saves you approximately Save $0.50 per 1M input tokens versus the other, making it the more budget-friendly choice for high-volume applications.

Cost Calculator

GPT-5.4
$10.00
/month
Gemini 3.1 Pro
$8.00
/month
💡 Gemini 3.1 Pro saves $2.00/month (20%) vs GPT-5.4

Technical Specifications Comparison

SpecificationGPT-5.4Gemini 3.1 Pro
ProviderOpenAIGoogle
Release Date2026-052026-05
Context Window256K1M
Max Output Tokens16,38465,536
Input Price$2.50/1M$2.00/1M
Output Price$15.00/1M$12.00/1M
VisionYes ✓Yes ✓
AudioNoYes ✓
Function CallingYes ✓No
JSON ModeYes ✓No
StreamingYes ✓No
Fine TuningYes ✓No
Rate Limits10K RPM1K RPM
Statusactiveactive

Pros & Cons

GPT-5.4

Advantages
  • ✓Excellent performance
  • ✓Lower cost than 5.5
  • ✓Daily workhorse
Limitations
  • ✗Not the latest frontier
  • ✗Higher cost than DeepSeek

Gemini 3.1 Pro

Advantages
  • ✓Flagship model
  • ✓1M context
  • ✓Best Gemini quality
Limitations
  • ✗Costly for high-volume
  • ✗Coding lags GPT/Claude

Benchmarks

BenchmarkGPT-5.4Gemini 3.1 Pro
MMLUN/AN/A
GPQAN/AN/A
SWE-benchN/AN/A
HumanEvalN/AN/A
GSM8KN/AN/A
MATHN/AN/A
MMMUN/AN/A
Benchmark scores are not publicly available for most models. We list official scores when published by the provider.

Best For

Use CaseGPT-5.4Gemini 3.1 Pro
Coding★★★★
AI Agents★★★★
Research★★
Writing★★★★★
Enterprise★★★★★

Performance & Pricing Analysis

Performance: GPT-5.4 delivers excellent performance with 256K context. Gemini 3.1 Pro delivers flagship model with 1M context. Both models serve different audiences — GPT-5.4 targets excellent performance and lower cost than 5.5, while Gemini 3.1 Pro targets flagship model and 1m context.

Pricing: At $2.50/$15.00 vs $2.00/$12.00 per 1M tokens, Gemini 3.1 Pro is the more affordable choice. For a typical workload of 1M requests/month at 1K tokens input and 500 tokens output, Gemini 3.1 Pro saves approximately $2.00/month.

Recommendation: Choose Gemini 3.1 Pro if you prioritize cost-efficiency. Both models are available through AI API Hub with USDT/USDC payments and instant activation. Start with $5 and access all models through one API key.

Frequently Asked Questions

What is the difference between GPT-5.4 and Gemini 3.1 Pro?

GPT-5.4 is OpenAI's gpt5 model with 256K context at $2.50/1M input. Gemini 3.1 Pro is Google's gemini model with 1M context at $2.00/1M input. They serve different ecosystems — access both through AI API Hub with one key.

Which model is cheaper?

Gemini 3.1 Pro is cheaper at $2.00/1M input vs $2.50/1M for GPT-5.4. You save $0.50 per 1M input tokens with Gemini 3.1 Pro.

Which model is better for coding?

Coding capabilities vary by model. Check the features section above for details.

Which model has a larger context window?

Gemini 3.1 Pro has a larger context window (1M vs 256K) — $310% more capacity.

Can both models use function calling?

Function calling support varies. GPT-5.4 supports it. Gemini 3.1 Pro does not support it.

How much does GPT-5.4 cost?

GPT-5.4 costs $2.50/1M input tokens and $15.00/1M output tokens with 256K context. Pay-as-you-go, no minimum. Sign up at AI API Hub and start with $5.

How much does Gemini 3.1 Pro cost?

Gemini 3.1 Pro costs $2.00/1M input tokens and $12.00/1M output tokens with 1M context. Pay-as-you-go, no minimum. Sign up at AI API Hub and start with $5.

Which model is better for enterprise use?

Neither model targets the premium enterprise tier exclusively. For enterprise needs, consider flagship models with higher quality guarantees.

Which model is better for AI agents?

Agent capabilities vary. Check the function calling support in the specs table above.

How do I access these APIs?

Access both GPT-5.4 and Gemini 3.1 Pro through AI API Hub: (1) Register at api.apiyihe.org/register?aff=8JZC, (2) Deposit USDT/USDC, (3) Get your API key, (4) Use OpenAI-compatible endpoint https://api.apiyihe.org/v1 with model names "gpt-5.4" or "gemini-3.1-pro". One API key gives access to all models.

Related Models

GPT-5.5$5.00/1MGPT-4.1$2.00/1MGPT-4.1 Mini$0.40/1MGemini 2.5 Pro$1.25/1MGemini 2.5 Flash Lite$0.10/1MGemini 2.0 Flash$0.10/1M

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Access GPT-5.4 & Gemini 3.1 Pro via AI API Hub

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