TopxAI · Model prices · OpenAI
GPT-6 Astra API pricing
Model id gpt-6-astra. $5 input / $25 output per 1M tokens on the lowest-priced route; every route is listed below. Prices are fixed in USD, charged from prepaid credit, and every request writes one usage-log row with the route and the charge.
OpenAI's flagship GPT-6 Astra: top-tier reasoning and coding with a 1.05M-token context and 128K output. Prompts with more than 272K input tokens are billed at the long-context rate (2x input and cache, 1.5x output) for the full request.
Prices by route
| Route | Input (USD / 1M tokens) | Output (USD / 1M tokens) | Cache read (USD / 1M tokens) | Cache write (USD / 1M tokens) | Cache write (1h) (USD / 1M tokens) |
|---|---|---|---|---|---|
| Provider list price (checked 2026-10-24) Cache write references use the default 30-minute TTL. | $10 | $50 | $1 | $12.5 | — |
| Provider list price (checked 2026-10-24) Cache write references use the default 30-minute TTL., from 272,001 input tokens (whole request) | $20 | $75 | $2 | $25 | — |
| Official line | $9 | $45 | $0.9 | $11.25 | — |
| Official line, from 272,001 input tokens (whole request) | $18 | $67.5 | $1.8 | $22.5 | — |
| Shared pool | $5 | $25 | $0.5 | $6.25 | — |
| Shared pool, from 272,001 input tokens (whole request) | $10 | $37.5 | $1 | $12.5 | — |
Input, output and cache lanes bill per million tokens. A whole-request long-context row applies once the input context of a request reaches the threshold shown. An Auto-route key sends each request to the lowest-priced route that serves the model.
Endpoints
POST /v1/chat/completions: OpenAI Chat Completions (Bearer)POST /v1/responses: OpenAI Responses (Bearer)
Call gpt-6-astra
Base URL https://ai.topxea.com/v1 for OpenAI-style SDKs, https://ai.topxea.com for the Anthropic SDK; the API key goes where the provider's key would go.
curl https://ai.topxea.com/v1/chat/completions \
-H "Authorization: Bearer $TOPXAI_API_KEY" \
-H "content-type: application/json" \
-d '{"model": "gpt-6-astra", "messages": [{"role": "user", "content": "Say hello in one sentence."}]}'Related
- Connect your SDK
- Shared pool, official line and auto route
- How requests are billed
- LLM API price calculator
- Every model's price
Get an API key · Docs · Blog · About TopxAI