GPT-5.4 nano
OpenAI's smallest GPT-5.4 nano model, documented in the official OpenAI API model guide for very low-latency or economical GPT-5 family routing.
Newer version: GPT-5.6 Luna
Provider
OpenAI
Model family
OpenAI GPT
Small LLM
Cost tier
Nano
Status
Legacy
Why teams choose it
Broad capability envelope
Useful when the same stack must cover chat, multimodal inputs, tooling, or structured-output shapes without juggling many SKUs.
Long-context analysis
Helps teams summarize, compare, and extract insights from long documents without losing important nuance.
Coding and tools
Works well for code assistance, tool calling, and agent workflows where instructions must stay consistent across steps.
Cost-efficient routing
Useful as part of a routing stack where cheap models handle drafts and confirmations and this tier handles genuinely hard passages.
Tradeoffs to know
- Not a replacement for flagship or standard GPT-5.4 reasoning lanes.
Technical specs
- Inputs
- text, image
- Outputs
- text
- Capabilities
- low latency, tool use, classification, cost efficiency
- License
- Proprietary API
Benchmarks
No independent or vendor benchmark scores in this catalog entry.
OpenAI GPT family lineup
Current models
Related models
GPT-5.4 nano FAQ
What is GPT-5.4 nano?
OpenAI's smallest GPT-5.4 nano model, documented in the official OpenAI API model guide for very low-latency or economical GPT-5 family routing.
When does GPT-5.4 nano fit best?
High-volume lightweight assistants
What should teams watch out for with GPT-5.4 nano?
Not a replacement for flagship or standard GPT-5.4 reasoning lanes.
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