GPT-3.5 Turbo vs GPT-5 Pro
OpenAI vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5 Pro has the higher intelligence index (88.4 vs 35.2)
- •GPT-3.5 Turbo is cheaper ($0.50 vs $15.00 per 1M input)
- •GPT-5 Pro has a larger context window (400K)
| GPT-3.5 Turbo | GPT-5 Pro | |
|---|---|---|
| Intelligence index | 35.2 | 88.4 |
| Developer | OpenAI | OpenAI |
| Type | LLM | LLM |
| Access | API only | API only |
| Context window | 16,385 tokens | 400,000 tokens |
| Input price | $0.50 / 1M | $15.00 / 1M |
| Output price | $1.50 / 1M | $120.00 / 1M |
| Speed | 100 tok/s | — |
| Released | March 1, 2023 | October 6, 2025 |
| Parameters | — | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
GPT-3.5 Turbo
GPT-5 Pro
GPQA Diamond
30.8
88.4