gpt-5-4-nano
Overview
GPT-5.4 Nano is the smallest and most cost-effective variant in the GPT-5.4 family, released on March 17, 2026, designed for speed-critical and cost-sensitive scenarios. At just $0.20/$1.25 per MTok, it delivers reasoning capabilities with an Intelligence Index of 44.4, far above the median of 20 among similarly-priced models — ideal for classification, data extraction, ranking, and sub-agent tasks at scale.
Key Features
- Extreme Cost Efficiency: $0.20/1M input + $1.25/1M output, blended rate (3:1 input-to-output ratio) of just $0.46/1M tokens — the most affordable option in the GPT-5.4 family.
- High-Speed Inference: ~221.8 tokens/second generation speed with 3.72-second time to first token, suitable for real-time systems.
- Reasoning Model: Despite being the smallest variant, GPT-5.4 Nano is still a reasoning model with extended thinking / chain-of-thought reasoning.
- Multimodal Input: Supports text and image input, suitable for lightweight multimodal tasks like visual classification and image analysis.
- 400K Context Window: Same 400,000 token context window as Mini, providing ample input capacity.
Best Use Cases
- Classification & Data Extraction: OpenAI's officially recommended core use case, delivering reliable performance for structured data processing, text classification, and information extraction.
- Coding Sub-Agents: Suitable for handling simpler supporting tasks in multi-agent architectures, such as code formatting, linting, and small code generation.
- Real-Time Systems & High-Throughput Pipelines: Ultra-low latency and cost combination makes it perfect for background tasks, real-time ranking, and large-scale automation pipelines.
- Distributed Agent Architectures: Serves as edge execution nodes in distributed agent systems, minimizing per-call cost and latency.
Capabilities and Limitations
| Capability | Detailed Description |
|---|---|
| Reasoning Ability | Intelligence Index 44.4 (median 20 for similar price tier), with chain-of-thought reasoning, but less capable than Mini and Standard on complex multi-step problems. |
| Creative Ability | Suitable for short text generation and template filling; not suited for long-form writing or creation requiring deep reasoning. |
| Multimodal Ability | Supports text and image input with text output; suitable for basic image classification and recognition, complex image analysis is better handled by larger models. |
| Response Speed | Very fast — ~221.8 tokens/second, 3.72s time to first token, the fastest model in the GPT-5.4 family. |
| Context Window | 400,000 tokens |
| Max Output | Not officially specified |
| Knowledge Cutoff | August 31, 2025 |
Standard Pricing
The token prices below are shown in USD per 1 million tokens; web search is billed in USD per use.
| Model | Input (USD / 1M Tokens) | Cache Write (USD / 1M Tokens) | Cache Read (USD / 1M Tokens) | Output (USD / 1M Tokens) | Web Search (USD / use) |
|---|---|---|---|---|---|
| GPT-5.4 Nano | $0.20 | $0.20 | $0.02 | $1.25 | $0.01 |
Credits settlement: B.AI converts charges at 1 USD = 1,000,000 Credits and deducts Credits from the account balance.
Prices shown in the documentation are B.AI standard reference prices for base billing purposes. B.AI may provide lower actual usage costs through top-up bonuses and account benefits. Specific prices, bonus Credits, and account benefits are subject to the platform display and final billing records.