GPT-6 Astra Pro
openai/gpt-6-astra-proGPT-6 Astra Pro is the pro reasoning tier of GPT-6 Astra, OpenAI's most capable GPT-6 model. It spends more reasoning effort per request for the hardest frontier tasks, at the same per-token price as GPT-6 Astra.
- Input price
- $10.00USD / 1M tokens
- Output price
- $50.00USD / 1M tokens
- Context window
- N/A
- Max output
- 128K
Try the model
Playground
Input⌘ / Ctrl + Enter
Try a prompt
OutputReady
Your response will appear here
Choose an example or write a prompt, then click Run.
Specifications
Pricing
- Input
- $10 / 1M tokens
- Output
- $50 / 1M tokens
- Billing formula
- usage.prompt_tokens >= 272000 ? (usage.prompt_tokens * 20 / 1000000 + usage.completion_tokens * 75 / 1000000 - usage.cached_tokens * 9 / 1000000 + usage.cache_creation_tokens * 2.5 / 1000000) : (usage.prompt_tokens * 10 / 1000000 + usage.completion_tokens * 50 / 1000000)
Context & modalities
- Max output
- 128,000 tokens
- Input
- Text, image
- Output
- Text
Capabilities
- Chat
- Supported
- Vision
- Supported
- Reasoning
- Supported
- Structured output
- Supported
- Function calling
- Supported
- Audio input
- Not supported
Access
- Provider
- OpenAI
- Model ID
- openai/gpt-6-astra-pro
- Execution
- sync
- API
- Responses API
- Endpoint
- /v1/responses
- API
- Chat Completions API
- Endpoint
- /v1/chat/completions
Start building
Send your first request
Choose either supported API with unified authentication and usage tracking.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/responses" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "openai/gpt-6-astra-pro",
"input": "Hello",
"max_output_tokens": 2048
}
SANDBASE_JSON
)
printf '%s\n' "$result"Choose your model
Compare models
| Model | Context | Input / 1M | Output / 1M | Released |
|---|---|---|---|---|
OpenAI: GPT-6 Astra ProThis model OpenAI | — | $10.00 | $50.00 | Sep 4, 2026 |
OpenAI | 1.1M | — | — | Sep 29, 2026 |
OpenAI | 1.1M | — | — | Sep 29, 2026 |
OpenAI | 1.1M | — | — | Sep 22, 2026 |
OpenAI | 1.1M | — | — | Sep 22, 2026 |
OpenAI | 1.1M | — | — | Sep 22, 2026 |