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OpenAIProprietary
GPT-5-Nano
GPT-5-Nano is a reasoning model developed by OpenAI. It is equipped with a 256K long context window and supports advanced reasoning tasks.
Parameters
Undisclosed
Context Window
256K
License
Proprietary
Release Date
2025-08-07
API Pricing
API pricing for this model is not yet available
Strengths
- ・Advanced reasoning capabilities
- ・256K long context understanding
- ・Optimized by OpenAI
Weaknesses
- ・Closed-source
- ・Detailed specifications are undisclosed
- ・License restrictions
Use Cases
- ・Complex logical reasoning
- ・Long document analysis
- ・Advanced problem-solving
Deep Analysis
Release Date
August 2025
SWE-bench Verified
34.8%
MATH Level 5
95.2%
Context Window
400K tokens
Pricing
$0.05 / $0.40 per 1M tokens
Strengths
- ・Extremely cheap at $0.05/$0.40
- ・400K context at nano pricing
- ・Strong math (95.2% MATH Level 5)
- ・Good instruction following (IFEval 93.2%)
Weaknesses
- ・Superseded by GPT-5.4 nano
- ・Weak coding (SWE-bench 34.8%)
- ・Low reasoning (35.5% LiveBench)
Competitor Comparison
| Model | SWE | GPQA | Price |
|---|---|---|---|
| gpt-oss-20b | 60.7% | 74.2% | $0.04/$0.15 |
| Gemini 2.0 Flash | $0.10/$0.40 |
GPT-5 Nano is the ultra-budget tier with 400K context at the lowest price.
Sources
Analysis generated: 2026-05-24