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.
OpenAI: GPT-3.5 Turbo — OpenAI. Context window 16,385 tokens. API pricing (per 1M tokens): Input $0.5, Output $1.5. License: Proprietary. LMArena 1,125. GPQA Diamond 28%.
| Provider | OpenAI |
|---|---|
| API model ID | openai/gpt-3.5-turbo |
| Tier | Small |
| Context window | 16,385 tokens |
| Max output | 4,096 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $0.5 |
| API pricing (per 1M tokens) · Output | $1.5 |
| LMArena | 1,125 (gpt-3.5-turbo-0125) |
| GPQA Diamond | 28% |
LMArena (CC-BY 4.0, best reasoning setting, 2026-10-02) · GPQA Diamond: Epoch AI (CC-BY 4.0)
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