OpenAI: GPT-5 Nano
The OpenAI GPT-5 Nano is designed to process vast amounts of text, images, and files with a context length of 400,000 tokens, making it versatile for various applications that require handling multiple input types. It supports reasoning and tools integration, enhancing its utility for complex tasks. However, the structured output feature remains unverified. For those prioritizing cost-effectiveness in their AI solutions, GPT-5 Nano might be worth considering despite its premium pricing of $0.05 per million input tokens and $0.4 per million output tokens. With a blended benchmark score of 32.0 across multiple independent tests, it offers competitive performance, though the absence of detailed benchmark coverage limits more precise comparisons.
Benchmark results
Independent, published benchmarks. Blended score 31.6 across 1 benchmark, last refreshed 2026-07-27. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 32.8 |
- Model ID
- openai/gpt-5-nano
- Vendor
- openai
- Released
- August 2025
- Tokenizer
- GPT
- Input Modalities
- text, image, file
- Output Modalities
- text
- Max Output
- 128,000 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- yes
What it costs in practice
Computed from the current $0.05/M input and $0.40/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | under $0.01 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.05 |
| A month of a busy support chatbot | 5M in / 2M out | $1.05 |
Category rankings
Where OpenAI: GPT-5 Nano places across the 6 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #10 | Self-Hosted / LocalCost · of 25 ranked | 117 |
| #11 | Cheap Bulk InferenceCost · of 25 ranked | 137 |
| #11 | Real-Time ChatLatency · of 25 ranked | 118 |
| #12 | Social Media PostsWriting · of 25 ranked | 119 |
| #12 | Voice Assistant BackendVoice · of 25 ranked | 123 |
| #13 | Code CompletionCode · of 25 ranked | 132 |
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Quick answers
- How much does OpenAI: GPT-5 Nano cost?
- $0.05 per million input tokens and $0.40 per million output tokens.
- What is OpenAI: GPT-5 Nano's context window?
- 400,000 tokens, roughly 600 pages of text in a single request.
- Does OpenAI: GPT-5 Nano support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can OpenAI: GPT-5 Nano process images?
- Yes, it accepts image input.