# OpenAI GPT-5 Mini API

> GPT-5 mini is the faster, more efficient tier of OpenAI's GPT-5 reasoning family, released in August 2025 with text and image input and text output. OpenAI recommends it for well-defined tasks and precise prompts in low-latency, high-volume workloads, keeping GPT-5's configurable reasoning. Choose it over full GPT-5 when speed and throughput matter more than maximum depth; OpenAI's later small models are its suggested successors.

Source: https://www.sandbase.ai/models/openai/gpt-5-mini
API reference: https://www.sandbase.ai/models/openai/gpt-5-mini/docs

## Facts

- Provider: OpenAI
- Type: Language model
- Model ID: `openai/gpt-5-mini`
- Price: $0.25 per 1M input tokens, $2 per 1M output tokens
- Context window: 400K tokens, up to 128K output tokens
- Capabilities: chat, vision, reasoning, structured output, function calling
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

- Responses API: `POST https://api.sandbase.ai/v1/responses`
- Chat Completions API: `POST https://api.sandbase.ai/v1/chat/completions`

```bash
curl -X POST https://api.sandbase.ai/v1/responses \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "openai/gpt-5-mini",
  "input": "Hello",
  "max_output_tokens": 2048
}'
```

## FAQ

### How do I call OpenAI GPT-5 Mini through SandBase?

Create a SandBase API key, then send requests with the model ID "openai/gpt-5-mini" to Responses API (/v1/responses) or Chat Completions API (/v1/chat/completions) at https://api.sandbase.ai. The request examples on this page show the exact payload.

### How much does OpenAI GPT-5 Mini cost?

$0.25 per 1M input tokens and $2 per 1M output tokens, billed per request from your SandBase balance. Discounts, when available, are shown in the pricing on this page.

### What is the context window of OpenAI GPT-5 Mini?

400K tokens of context, with up to 128K output tokens per response.

### How does OpenAI GPT-5 Mini score on benchmarks?

OpenAI GPT-5 Mini scores 16.8 on the Artificial Analysis Intelligence Index (v4.3), ranking #66 of 83 models on SandBase; Coding Index 15.6, Agentic Index 6.8. Source: Artificial Analysis, measured as GPT-5 mini (High).

### Which features does OpenAI GPT-5 Mini support?

OpenAI GPT-5 Mini supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.

### Do I need a separate OpenAI account?

No. One SandBase API key and balance gives you access to OpenAI GPT-5 Mini and the other models in the catalog; you do not need to sign up with OpenAI separately.