OpenAI: GPT-5.4 Mini
OpenAI's GPT-5.4 Mini is capable of handling text, images, and file inputs within a context length of 400,000 tokens; it supports reasoning and tools. While structured output is not supported, the model excels in coding tasks with an AI Index score of 92.5. This model should be considered for projects requiring extensive text or image processing capabilities alongside robust reasoning abilities. Given its blended benchmark score of 70.3 across three independent benchmarks, GPT-5.4 Mini offers a solid performance-to-price ratio, especially for those who can afford the premium at $0.75 per million input tokens and $4.5 per million output tokens. For applications that prioritize coding precision and reasoning but do not require structured outputs, this model stands as a pragmatic choice in the market.
Benchmark results
Independent, published benchmarks. Blended score 70.3 across 3 benchmarks, last refreshed 2026-08-13. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 67.5 |
| AI Index Coding | software engineering tasks | 92.5 |
| AI Index Agentic | multi-step tool-using tasks | 52.0 |
- Model ID
- openai/gpt-5.4-mini
- Vendor
- openai
- Released
- March 2026
- Tokenizer
- GPT
- Input Modalities
- file, image, text
- 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 $0.75/M input and $4.50/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.03 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.60 |
| A month of a busy support chatbot | 5M in / 2M out | $12.75 |
Category rankings
Where OpenAI: GPT-5.4 Mini places across the 6 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #18 | Image CaptioningVision · of 25 ranked | 121 |
| #20 | Dataset AnnotationResearch · of 25 ranked | 142 |
| #21 | JSON ExtractionData · of 25 ranked | 146 |
| #23 | Customer SupportBusiness · of 25 ranked | 132 |
| #24 | Bulk Data LabelingData · of 25 ranked | 133 |
| #25 | Trivia & General KnowledgePersonal · of 25 ranked | 120 |
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Quick answers
- How much does OpenAI: GPT-5.4 Mini cost?
- $0.75 per million input tokens and $4.50 per million output tokens.
- What is OpenAI: GPT-5.4 Mini's context window?
- 400,000 tokens, roughly 600 pages of text in a single request.
- Does OpenAI: GPT-5.4 Mini support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can OpenAI: GPT-5.4 Mini process images?
- Yes, it accepts image input.