GPT-5.4 nano is the most lightweight and cost-efficient variant of the GPT-5.4 family, optimized for speed-critical and high-volume tasks. It supports text and image inputs and is designed for low-latency...
OpenAI: GPT-5.4 Nano — OpenAI. Context window 400,000 tokens. API pricing (per 1M tokens): Input $0.2, Output $1.25. License: Proprietary. LMArena 1,372. GPQA Diamond 78.5%.
| Provider | OpenAI |
|---|---|
| API model ID | openai/gpt-5.4-nano |
| Tier | Frontier |
| Context window | 400,000 tokens |
| Max output | 128,000 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $0.2 |
| API pricing (per 1M tokens) · Output | $1.25 |
| LMArena | 1,372 (gpt-5.4-nano-high) |
| GPQA Diamond | 78.5% |
LMArena (CC-BY 4.0, best reasoning setting, 2026-10-02) · GPQA Diamond: Epoch AI (CC-BY 4.0)
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