GPT-5.4 vs Qwen3.5-Flash
Comprehensive comparison of OpenAI's GPT-5.4 and Alibaba's Qwen3.5-Flash. Pricing, specs, benchmarks, use cases, and recommendations.
Quick Verdict
Overview
GPT-5.4 (OpenAI) and Qwen3.5-Flash (Alibaba) 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. Qwen3.5-Flash is a qwen-class model with 1M context, priced at $0.10/$0.40 per 1M tokens.
Balanced performance and cost. The recommended model for most production workloads.. The most affordable Qwen model. Excellent for high-volume, cost-sensitive applications with 1M context.. Both are available through AI API Hub with USDT and USDC payments — no credit card required.
At current pricing, using Qwen3.5-Flash saves you approximately Save $2.40 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 | Qwen3.5-Flash |
|---|---|---|
| Provider | OpenAI | Alibaba |
| Release Date | 2026-05 | 2026-05 |
| Context Window | 256K | 1M |
| Max Output Tokens | 16,384 | 65,536 |
| Input Price | $2.50/1M | $0.10/1M |
| Output Price | $15.00/1M | $0.40/1M |
| Vision | Yes ✓ | No |
| Audio | No | No |
| Function Calling | Yes ✓ | No |
| JSON Mode | Yes ✓ | No |
| Streaming | Yes ✓ | Yes ✓ |
| Fine Tuning | Yes ✓ | No |
| Rate Limits | 10K RPM | 10K 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
Qwen3.5-Flash
- ✓Ultra-low cost
- ✓1M context
- ✓Fast
- ✗Weaker reasoning
- ✗No vision
Benchmarks
| Benchmark | GPT-5.4 | Qwen3.5-Flash |
|---|---|---|
| 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 | Qwen3.5-Flash |
|---|---|---|
| Coding | ★ | ★★★ |
| AI Agents | ★★★ | ★★ |
| Research | ★ | ★ |
| Writing | ★★★ | ★★★ |
| Enterprise | ★★★ | ★ |
Performance & Pricing Analysis
Performance: GPT-5.4 delivers excellent performance with 256K context. Qwen3.5-Flash delivers ultra-low cost with 1M context. Both models serve different audiences — GPT-5.4 targets excellent performance and lower cost than 5.5, while Qwen3.5-Flash targets ultra-low cost and 1m context.
Pricing: At $2.50/$15.00 vs $0.10/$0.40 per 1M tokens, Qwen3.5-Flash is the more affordable choice. For a typical workload of 1M requests/month at 1K tokens input and 500 tokens output, Qwen3.5-Flash saves approximately $9.70/month.
Recommendation: Choose Qwen3.5-Flash 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 Qwen3.5-Flash 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="qwen3.5-flash", 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: "qwen3.5-flash"curl https://api.apiyihe.org/v1/chat/completions \
-H "Authorization: Bearer YOUR_KEY" \
-d '{"model": "qwen3.5-flash", "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 Qwen3.5-Flash?
GPT-5.4 is OpenAI's gpt5 model with 256K context at $2.50/1M input. Qwen3.5-Flash is Alibaba's qwen model with 1M context at $0.10/1M input. They serve different ecosystems — access both through AI API Hub with one key.
Which model is cheaper?
Qwen3.5-Flash is cheaper at $0.10/1M input vs $2.50/1M for GPT-5.4. You save $2.40 per 1M input tokens with Qwen3.5-Flash.
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?
Qwen3.5-Flash 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. Qwen3.5-Flash 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 Qwen3.5-Flash cost?
Qwen3.5-Flash costs $0.10/1M input tokens and $0.40/1M 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 Qwen3.5-Flash 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 "qwen3.5-flash". 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 Qwen3.5-Flash (or vice versa) only requires changing the model parameter. All other code — SDK initialization, message format, streaming — remains identical.
Which model has better latency?
Qwen3.5-Flash 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 & Qwen3.5-Flash via AI API Hub
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