GPT-4.1 Nano
OpenAILarge Language ModelProprietaryThe smallest and fastest GPT-4.1 variant. Optimized for speed and cost, suitable for simple tasks at massive scale.
Abilities
Use Cases
Available in Tools
Availability
How to Use
Pros
- Extremely fast responses — optimized for latency-sensitive applications
- Cheapest GPT-4.1 variant — 25x cheaper than full GPT-4.1 on input tokens
- 1M token context window despite minimal size
- Good for classification and extraction tasks at massive throughput
Cons
- Significantly weaker than full GPT-4.1 across all capability dimensions
- Limited reasoning — unsuitable for multi-step logic or analysis
- Poor creative writing quality
- Not suitable for complex tasks — best used only for simple operations
- Closed source — no option for self-hosting
What to Use It For
Perfect For
Extremely fast and cheap — perfect for classifying millions of items cost-effectively
Structured output support with minimal latency makes it ideal for parsing pipelines
Ultra-low latency enables responsive inline suggestions
Good For
Fast responses at rock-bottom cost for simple conversational interactions
Can produce adequate summaries of straightforward texts very quickly
Not Recommended
Model is too small to handle multi-step reasoning reliably
Try instead: GPT-4.1, o3
Code generation quality is too low for anything beyond trivial snippets
Try instead: GPT-4.1 Mini, Claude Sonnet 4
Do Not Use For
Output is flat and formulaic — lacks the expressiveness needed for creative work
Try instead: Claude Opus 4
Cannot maintain coherent analysis across complex topics
Try instead: Gemini 2.5 Pro