# OpenAI GPT-6 Astra Pro API

> GPT-6 Astra Pro is the same GPT-6 Astra model, OpenAI's most capable GPT-6 tier, served in OpenAI's pro reasoning mode rather than as different weights. In pro mode the model does more work on each request before returning one final answer, which OpenAI suggests for complex optimization, high-value coding or review, and deep analysis. Expect higher latency and token usage than standard Astra, so reserve it for problems where a marginal quality gain changes the outcome.

Source: https://www.sandbase.ai/models/openai/gpt-6-astra-pro
API reference: https://www.sandbase.ai/models/openai/gpt-6-astra-pro/docs

## Facts

- Provider: OpenAI
- Type: Language model
- Model ID: `openai/gpt-6-astra-pro`
- Price: $10 per 1M input tokens, $50 per 1M output tokens
- Context window: 1.1M 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-6-astra-pro",
  "input": "Hello",
  "max_output_tokens": 2048
}'
```

## FAQ

### How do I call OpenAI GPT-6 Astra Pro through SandBase?

Create a SandBase API key, then send requests with the model ID "openai/gpt-6-astra-pro" 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-6 Astra Pro cost?

$10 per 1M input tokens and $50 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-6 Astra Pro?

1.1M tokens of context, with up to 128K output tokens per response.

### Which features does OpenAI GPT-6 Astra Pro support?

OpenAI GPT-6 Astra Pro 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-6 Astra Pro and the other models in the catalog; you do not need to sign up with OpenAI separately.