GPT-5.4 vs DeepSeek V4 Pro
Comprehensive comparison of OpenAI's GPT-5.4 and DeepSeek's DeepSeek V4 Pro. Pricing, specs, benchmarks, use cases, and recommendations.
Quick Verdict
Overview
GPT-5.4 (OpenAI) and DeepSeek V4 Pro (DeepSeek) 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. DeepSeek V4 Pro is a deepseek-class model with 128K context, priced at $0.55/$2.19 per 1M tokens.
Balanced performance and cost. The recommended model for most production workloads.. DeepSeek's most capable model. Near-flagship performance at ultra-low cost. Strong in reasoning, coding, and math.. Both are available through AI API Hub with USDT and USDC payments — no credit card required.
At current pricing, using DeepSeek V4 Pro saves you approximately Save $1.95 per 1M input tokens versus the other, making it the more budget-friendly choice for high-volume applications.
Cost Calculator
Technical Specifications Comparison
| Specification | GPT-5.4 | DeepSeek V4 Pro |
|---|---|---|
| Provider | OpenAI | DeepSeek |
| Release Date | 2026-05 | 2026-05 |
| Context Window | 256K | 128K |
| Max Output Tokens | 16,384 | 65,536 |
| Input Price | $2.50/1M | $0.55/1M |
| Output Price | $15.00/1M | $2.19/1M |
| Vision | Yes ✓ | No |
| Audio | No | No |
| Function Calling | Yes ✓ | Yes ✓ |
| JSON Mode | Yes ✓ | No |
| Streaming | Yes ✓ | Yes ✓ |
| Fine Tuning | Yes ✓ | No |
| Rate Limits | 10K RPM | 5K RPM |
| Status | active | active |
Pros & Cons
GPT-5.4
- ✓Excellent performance
- ✓Lower cost than 5.5
- ✓Daily workhorse
- ✗Not the latest frontier
- ✗Higher cost than DeepSeek
DeepSeek V4 Pro
- ✓Latest V4 flagship
- ✓Best DeepSeek quality
- ✓Strong reasoning & coding
- ✓95% cheaper than GPT-5.5
- ✗Smaller context vs 1M models
- ✗Less brand recognition
Benchmarks
| Benchmark | GPT-5.4 | DeepSeek V4 Pro |
|---|---|---|
| MMLU | N/A | N/A |
| GPQA | N/A | N/A |
| SWE-bench | N/A | N/A |
| HumanEval | N/A | N/A |
| GSM8K | N/A | N/A |
| MATH | N/A | N/A |
| MMMU | N/A | N/A |
Best For
| Use Case | GPT-5.4 | DeepSeek V4 Pro |
|---|---|---|
| Coding | ★ | ★★★ |
| AI Agents | ★★★ | ★★★ |
| Research | ★ | ★★★ |
| Writing | ★★★ | ★★★ |
| Enterprise | ★★★ | ★★ |
Performance & Pricing Analysis
Performance: GPT-5.4 delivers excellent performance with 256K context. DeepSeek V4 Pro delivers latest v4 flagship with 128K context. Both models serve different audiences — GPT-5.4 targets excellent performance and lower cost than 5.5, while DeepSeek V4 Pro targets latest v4 flagship and best deepseek quality.
Pricing: At $2.50/$15.00 vs $0.55/$2.19 per 1M tokens, DeepSeek V4 Pro is the more affordable choice. For a typical workload of 1M requests/month at 1K tokens input and 500 tokens output, DeepSeek V4 Pro saves approximately $8.36/month.
Recommendation: Choose DeepSeek V4 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.
How to Switch Between Models
Since both GPT-5.4 and DeepSeek V4 Pro are available through AI API Hub with OpenAI-compatible API format, switching between them requires only changing the model name parameter. Your existing SDK code works without modification.
from openai import OpenAI client = OpenAI(api_key="YOUR_KEY", base_url="https://api.apiyihe.org/v1") # Before: response = client.chat.completions.create(model="gpt-5.4", messages=[...]) # After: response = client.chat.completions.create(model="deepseek-v4-pro", messages=[...])
import OpenAI from "openai";
const client = new OpenAI({apiKey: process.env.KEY, baseURL: "https://api.apiyihe.org/v1"});
// Before: model: "gpt-5.4"
// After: model: "deepseek-v4-pro"curl https://api.apiyihe.org/v1/chat/completions \
-H "Authorization: Bearer YOUR_KEY" \
-d '{"model": "deepseek-v4-pro", "messages": [{"role":"user","content":"Hello"}]}'💡 AI API Hub supports both models through one API key. No separate accounts needed. Pay with USDT/USDC for all models.
Frequently Asked Questions
What is the difference between GPT-5.4 and DeepSeek V4 Pro?
GPT-5.4 is OpenAI's gpt5 model with 256K context at $2.50/1M input. DeepSeek V4 Pro is DeepSeek's deepseek model with 128K context at $0.55/1M input. They serve different ecosystems — access both through AI API Hub with one key.
Which model is cheaper?
DeepSeek V4 Pro is cheaper at $0.55/1M input vs $2.50/1M for GPT-5.4. You save $1.95 per 1M input tokens with DeepSeek V4 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?
GPT-5.4 has a larger context window (256K vs 128K) — $100% more capacity.
Can both models use function calling?
Yes, both GPT-5.4 and DeepSeek V4 Pro support function/tool calling. This enables building AI agents, structured data extraction, and API integrations.
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 DeepSeek V4 Pro cost?
DeepSeek V4 Pro costs $0.55/1M input tokens and $2.19/1M output tokens with 128K 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?
Both support tool calling for AI agents. GPT-5.4 provides premium agent capabilities. DeepSeek V4 Pro offers better cost-efficiency for high-volume agent calls.
How do I access these APIs?
Access both GPT-5.4 and DeepSeek V4 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 "deepseek-v4-pro". One API key gives access to all models.
Can I switch between these models without changing my code?
Yes. Since AI API Hub uses an OpenAI-compatible API format, switching from GPT-5.4 to DeepSeek V4 Pro (or vice versa) only requires changing the model parameter. All other code — SDK initialization, message format, streaming — remains identical.
Which model has better latency?
DeepSeek V4 Pro typically has faster response times due to its optimized architecture. GPT-5.4 may have higher latency on complex reasoning tasks. Use the cost calculator above to estimate costs at your volume.
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Access GPT-5.4 & DeepSeek V4 Pro via AI API Hub
One API key. All models. Pay with USDT, USDC & crypto. Save up to 70%.
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