OpenAI: GPT-5 Nano
The OpenAI GPT-5 Nano is a multi-modal AI model that can handle text, image, and file inputs up to 400,000 context length. It supports tools and reasoning capabilities, but does not produce structured output. Considering its price point, the OpenAI GPT-5 Nano may be suitable for users who need high-end input processing and are willing to pay $0.05 per million input tokens and $0.4 per million output tokens. With a blended benchmark score of 18.6 across one independent benchmark, it ranks among more established models, but its coverage is limited to a single score.
Benchmark results
Independent, published benchmarks. Blended score 18.6 across 1 benchmark, last refreshed 2026-09-10. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 21.4 |
- 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 3 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #20 | Self-Hosted / LocalCost · of 25 ranked | 117 |
| #21 | Real-Time ChatLatency · of 25 ranked | 118 |
| #24 | Cheap Bulk InferenceCost · of 25 ranked | 137 |
Similar models
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OpenAI: GPT-5.6 Terra Pro
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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.