Long context

GPT-6 Astra API pricing

OpenAI's GPT series — broad general capability, wide ecosystem, and the native models behind Codex CLI.

Model IDopenai/gpt-6-astra

ChatStreamingTool callingVision

Get API Key Run your first request

Call summary

Input

$10.00$2.00/ 1M tokens

Cache write $2.50

Cache read $0.20

Output

$50.00$10.00/ 1M tokens

Applies to request input ≤ 272,000 tokens · See pricing tiers

Context Window

1.05M

API Endpoints

GPT-6 Astra API endpoints

One API key — call this model through any of the 2 endpoints below.

POST/v1/chat/completionsOpenAI-compatible · Works for every model

Chat Completions reference

POST/v1/responsesResponses API · Native for Codex CLI

Responses API reference

GPT-6 Astra pricing tiers

Pricing is tiered by total input length per request (cache included); once a threshold is crossed, the whole request is billed at that tier. All prices are per 1M tokens.

Tier

Standard≤ 272K

Input

$10.00$2.00Cache write: $2.50Cache read: $0.20

Output

$50.00$10.00

Tier

Long context> 272K

Input

$20.00$4.00Cache write: $5.00Cache read: $0.40

Output

$75.00$15.00

Tier	Input	Output
Standard≤ 272K	$10.00$2.00Cache write: $2.50Cache read: $0.20	$50.00$10.00
Long context> 272K	$20.00$4.00Cache write: $5.00Cache read: $0.40	$75.00$15.00

Call GPT-6 Astra from your code

The same API key works across all 2 endpoints below.

Endpoint

/v1/chat/completions

Model ID

openai/gpt-6-astra

Request example

bash

curl -X POST \
  https://api.router.one/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "openai/gpt-6-astra",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'

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Production reliability

Privacy-safe aggregates from real Router One model calls, so you can assess stability and response latency before integrating.

Successful response share

95.79%

Success 2xx

95.79%

Rate limit 429

0.06%

Server 5xx

4.15%

TPS

59.39

tokens/s

Avg. time to first token

21.62 s

Avg. latency

34.88 s

Includes production requests ending in 2xx, 429, or 5xx. Average latency uses successful requests; time to first token and TPS require complete observations from successful streams. Public thresholds are 100 requests and 5 independent principals.

Updated Oct 20, 2026, 11:29 AM UTC

More GPT models on Router One

15 other GPT models on the same gateway and API key — each page lists endpoints, posted price, and context window.

Codex Auto Review$0.50 in / $3.00 out per 1M1.05M context GPT-5.6 Sol$0.50 in / $4.00 out per 1M1.05M context GPT-5.6 Terra$0.25 in / $1.50 out per 1M1.05M context GPT-6.1 Sol$0.40 in / $2.00 out per 1M1.05M context GPT-6 Sol$0.40 in / $2.00 out per 1M1.05M context GPT Image 2$0.50 per image GPT Image 2.5 Flare$0.50 per image GPT Image 2.5 Sunburst$0.50 per image

7 channel versions

GPT-5.5 · Azure$3.75 in / $22.50 out per 1M1.05M context GPT-5.6 Luna · Azure$0.15 in / $0.90 out per 1M1.05M context GPT-5.6 Sol · Azure$3.00 in / $15.00 out per 1M1.05M context GPT-5.6 Terra · Azure$1.50 in / $9.00 out per 1M1.05M context GPT-6.1 Sol · Azure$1.50 in / $7.50 out per 1M1.05M context GPT-6 Astra · Azure$7.50 in / $37.50 out per 1M1.05M context GPT-6 Sol · Azure$1.50 in / $7.50 out per 1M1.05M context

GPT-6 Astra compared with other models

Spec and price matchups against peer models.

GPT-6 Astra vs Claude Opus 5 GPT-6 Astra vs GPT-5.6 Sol Claude Fable 5 vs GPT-6 Astra GPT-6 Sol vs GPT-6 Astra Grok 4.7 vs GPT-6 Astra GPT-6.1 Sol vs GPT-6 Astra Claude Opus 5.5 vs GPT-6 Astra

GPT-6 Astra at a glance

GPT-6 Astra (model ID openai/gpt-6-astra) is a GPT-series text model on Router One. GPT-6 Astra is priced in whole-request tiers. Request input ≤ 272,000 tokens: Input $2.00 / 1M tokens, Output $10.00 / 1M tokens, Cache write $2.50 / 1M tokens, Cached input $0.20 / 1M tokens; request input > 272,000 tokens: Input $4.00 / 1M tokens, Output $15.00 / 1M tokens, Cache write $5.00 / 1M tokens, Cached input $0.40 / 1M tokens. The total input tokens in each request select the tier; its rates apply to the whole request, not only tokens above the threshold. Router One subscriptions include GPT-6 Astra in the Flagship models allowance: Max 150, Ultra 450 requests per 30-day cycle. Usage beyond the allowance bills the wallet at posted rates. Within a plan allowance, a request above 272,000 / 512,000 input tokens counts as 2 / 4 requests. Context window: 1.05M tokens. Accepts text, image; returns text. Endpoints: POST /v1/chat/completions (OpenAI-compatible), POST /v1/responses (Responses API, the Codex CLI path).

GPT-6 Astra FAQ

How much does GPT-6 Astra cost on Router One?

GPT-6 Astra is priced in whole-request tiers. Request input ≤ 272,000 tokens: Input $2.00 / 1M tokens, Output $10.00 / 1M tokens, Cache write $2.50 / 1M tokens, Cached input $0.20 / 1M tokens; request input > 272,000 tokens: Input $4.00 / 1M tokens, Output $15.00 / 1M tokens, Cache write $5.00 / 1M tokens, Cached input $0.40 / 1M tokens. The total input tokens in each request select the tier; its rates apply to the whole request, not only tokens above the threshold.

Is GPT-6 Astra included in Router One subscriptions?

Router One subscriptions include GPT-6 Astra in the Flagship models allowance: Max 150, Ultra 450 requests per 30-day cycle. Usage beyond the allowance bills the wallet at posted rates. Within a plan allowance, a request above 272,000 / 512,000 input tokens counts as 2 / 4 requests.

Which endpoints serve GPT-6 Astra?

GPT-6 Astra is served on 2 endpoints — POST /v1/chat/completions (OpenAI-compatible), POST /v1/responses (Responses API, the Codex CLI path). The same Router One API key works on each.

What is GPT-6 Astra's context window?

GPT-6 Astra accepts up to 1.05M tokens of context per request on Router One.

Start using GPT-6 Astra

Create an API key and call GPT-6 Astra at $2.00 in / $10.00 out per 1M tokens (request input ≤ 272,000 tokens) on Router One — pay as you go, with per-request cost and latency visibility.

Get API Key Plans & pay-as-you-go pricing Compare models side by side Quickstart guide GPT API access GPT-6 Astra API guide