GPT-3.5 Turbo vs GPT-5.4 Pro
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for GPT-3.5 Turbo and GPT-5.4 Pro.
GPT-3.5 Turbo
GPT-3.5 Turbo is OpenAI's fastest model. It can understand and generate natural language or code, and is optimized for chat and traditional completion tasks. Training data up to Sep 2021.
GPT-5.4 Pro
GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K...
Technical Specifications
| Specification | GPT-3.5 Turbo | GPT-5.4 Pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Context Window | 16,385 tokens | 1,050,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | beta |
| API Available | Yes | Yes |
| Released Date | 2023-05-28 | 2026-03-05 |
API Pricing Comparison
Input Price per Million Tokens
GPT-3.5 Turbo
$0.50
GPT-5.4 Pro
$30.00
Output Price per Million Tokens
GPT-3.5 Turbo
$1.50
GPT-5.4 Pro
$180.00
Want to test both models live?
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
GPT-3.5 Turbo Quirks & Gotchas
No developer gotchas reported.
GPT-5.4 Pro Quirks & Gotchas
No developer gotchas reported.