GPT-5 Nano
Provider：OpenAI
GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger...
Key specs
- Context：400K
- Max output：128K
- Tokenizer：GPT
- Released：2025-08-07
Token pricing
- Input price：$0.050 / 1M tokens
- Output price：$0.400 / 1M tokens
- Cache read：$0.0050 / 1M tokens
- Blended price：$0.138 / 1M tokens
Modalities
Text, Image, File
Use Cases
- Deep Reasoning & Analysis：Process long legal docs, academic papers, financial reports; multi-hop reasoning and evidence-chain tracing across huge contexts.（≈ $0.0032/call）
- Vision Understanding & Generation：Recognize data trends in charts, OCR scanned docs, analyze photos and produce structured reports.（≈ $0.0024/call）
- Content Moderation：Auto-detect violations, hate speech, NSFW content; custom rule sets and score thresholds.（≈ $0.0008/item）
When to pick this model
Signals derived from public pricing and spec fields — not a benchmark. Validate with official docs and your own eval.
- Low input + output price: solid fit for high-frequency calls and batch processing.
- Low blended price: budget-friendly for fleet-scale deployment.
- Long max output (>=30K tokens): strong fit for deep report / essay / document-drafting workflows.
- Multimodal (text+image): fit for image captioning, OCR, chart QA, vision-grounded reasoning.
- File / PDF input support: fit for document parsing, contract review, RAG over private data.
FAQ
- What is the token pricing of GPT-5 Nano? Input price $0.050 / 1M tokens, output price $0.400 / 1M tokens, blended about $0.138 / 1M tokens. Refer to OpenAI’s official page for the exact rate.
- What context window does GPT-5 Nano support? Context window is 400K, max output about 128K, suitable for long documents, multi-turn chat and complex reasoning.
- What scenarios is GPT-5 Nano best for? Based on its capability and pricing, GPT-5 Nano fits best: Deep Reasoning & Analysis, Vision Understanding & Generation, Content Moderation. See the Use Cases section for details and cost estimates.
- What input/output modalities does GPT-5 Nano support? Supports Text, Image, File modality.
- Is GPT-5 Nano a free model? GPT-5 Nano is billed per token, not a free model.
- Which provider offers GPT-5 Nano? GPT-5 Nano is offered by OpenAI.
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Full info：GPT-5 Nano