OpenAI: GPT-5 Mini
The OpenAI GPT-5 Mini is an advanced AI model capable of handling text, images, and files, with a context length of 400,000 tokens and support for reasoning tools. While it excels in both input and output modalities, its structured output capabilities are currently unspecified. For those looking to integrate versatile AI into their projects without the complexity of fully-structured outputs, GPT-5 Mini is worth considering. Its blended benchmark score of 33.8 across three independent evaluations positions it as a capable performer, especially given its competitive pricing at $0.25 per million input tokens and $2.0 per million output tokens.
Benchmark results
Independent, published benchmarks. Blended score 33.8 across 3 benchmarks, last refreshed 2026-07-23. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 41.8 |
| AI Index Coding | software engineering tasks | 25.7 |
| AI Index Agentic | multi-step tool-using tasks | 32.0 |
- Model ID
- openai/gpt-5-mini
- 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 $0.25/M input and $2.00/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.01 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.23 |
| A month of a busy support chatbot | 5M in / 2M out | $5.25 |
Category rankings
Where OpenAI: GPT-5 Mini places across the 3 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #13 | Code CompletionCode · of 25 ranked | 132 |
| #21 | Image CaptioningVision · of 25 ranked | 120 |
| #24 | Customer SupportBusiness · of 25 ranked | 130 |
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Quick answers
- How much does OpenAI: GPT-5 Mini cost?
- $0.25 per million input tokens and $2.00 per million output tokens.
- What is OpenAI: GPT-5 Mini's context window?
- 400,000 tokens, roughly 600 pages of text in a single request.
- Does OpenAI: GPT-5 Mini support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can OpenAI: GPT-5 Mini process images?
- Yes, it accepts image input.