# OpenAI GPT-6 Astra API

> GPT-6 Astra is OpenAI's flagship GPT-6 reasoning model, described by OpenAI as its most capable model for the most demanding work, with text and image input. OpenAI recommends it for complex reasoning, coding, computer use, research and document creation, including multi-step workflows across code, browsers and professional software. It is the top tier above GPT-6.1 Sol and GPT-6 Luna; choose it when quality matters most, or the Astra Pro variant for the hardest requests.

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

## Facts

- Provider: OpenAI
- Type: Language model
- Model ID: `openai/gpt-6-astra`
- Price: $9 per 1M input tokens, $45 per 1M output tokens (10% off list price)
- 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",
  "input": "Hello",
  "max_output_tokens": 2048
}'
```

## FAQ

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

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

$9 per 1M input tokens and $45 per 1M output tokens with the current 10% discount (list price $10 / $50), billed per request from your SandBase balance.

### What is the context window of OpenAI GPT-6 Astra?

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

### How does OpenAI GPT-6 Astra score on benchmarks?

OpenAI GPT-6 Astra scores 52.7 on the Artificial Analysis Intelligence Index (v4.3), ranking #4 of 83 models on SandBase; Coding Index 76.9, Agentic Index 51.0. Source: Artificial Analysis, measured as GPT-6 Astra (Max).

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

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