Unofficial · GPT-6 Astra API cost
Not affiliated with OpenAIAstra pricing calculator for GPT-6 API cost
Estimate GPT-6 Astra API spend from uncached input, cached input, cache writes, and output tokens. Compare Standard, Batch, Flex, Fast, and Ultrafast, including the >272K long-context cliff. The worked rate card is on Astra API cost; the cliff math is on 272K pricing.
Cost calculator
Per-request cost
$0.00
Monthly estimate
$0.00
Line-item breakdown
| Line | Effective rate | Cost |
|---|---|---|
| Uncached input | — | — |
| Cached input | — | — |
| Cache writes | — | — |
| Output | — | — |
| Per-request total | — | |
Rates copied from OpenAI’s published cards, . The 10% box applies one regional-processing uplift or one FedRAMP uplift. OpenAI does not say those two uplifts stack, and this calculator does not stack them. Unofficial — confirm before you budget. Full tables: API cost · 272K cliff.
How much does Astra cost?
GPT-6 Astra Standard API rates, as published by OpenAI and , are $10 per 1M input tokens and $50 per 1M output tokens. Cached input is $1 per 1M; cache writes are $12.50 per 1M. Short-context means 272,000 input tokens or fewer. The same pricing page lists the other tiers below. This calculator starts from the Standard card, then applies the tier multiplier and the >272K cliff when it applies.
Sources: GPT-6 Astra model docs and OpenAI API pricing (also linked from openai.com/api/pricing). Not affiliated with OpenAI.
| Tier (≤272K input) | Input | Cached input | Cache writes | Output |
|---|---|---|---|---|
| Standard | $10.00 | $1.00 | $12.50 | $50.00 |
| Batch | $5.00 | $0.50 | $6.25 | $25.00 |
| Flex | $5.00 | $0.50 | $6.25 | $25.00 |
| Fast | $20.00 | $2.00 | $25.00 | $100.00 |
| Ultrafast | $60.00 | $6.00 | $75.00 | $300.00 |
Per 1M tokens. Long-context columns (more than 272K input tokens) are on the 272K pricing page. Line-by-line billing, cache reads versus writes, and worked monthly examples are on Astra API cost.
- Batch / Flex: half the Standard card on the pricing page. Flex is a
service_tieron Responses or Chat Completions; Batch is the Batch API. - Fast: 2× the applicable rates.
service_tierfastandpriorityrequest Fast mode. Priority processing was renamed Fast on July 30, 2026. - Ultrafast: published card above, equal to 6× Standard. Set
service_tiertoultrafastongpt-6-astra. GPT-6 Astra Ultrafast supports US data residency and global processing only. - >272K input cliff: when ordinary input + cached input + cache writes > 272,000, apply 2× to input and cache rates and 1.5× to output for the full request. Those three fields are the split of
input_tokens, not three stacks on top of it. - Regional processing and FedRAMP: each is a 10% uplift on the pricing page for models released on or after March 5, 2026 (regional) and for FedRAMP endpoints. The calculator’s checkbox applies one of those uplifts, not both.
FAQ
How much does Astra cost?
On the Standard API tier, Astra pricing is $10 / 1M input and $50 / 1M output (plus $1 cached input and $12.50 cache writes), . Batch and Flex are half of Standard; Fast is double; Ultrafast’s published short-context card is $60 / $6 / $75 / $300 per 1M. Over 272K input tokens, input and cache rates ×2 and output ×1.5 for the whole request. See the API cost and 272K pages, then verify on OpenAI’s docs.
Is ChatGPT subscription the same as Astra API pricing?
No. A ChatGPT / Plus / Pro subscription is separate from metered API usage. This calculator estimates API token costs only.
OpenAI paused ChatGPT Pro $200 / 20X — should I use the API for heavy Astra instead?
As of September 2026, OpenAI paused new ChatGPT Pro $200 (Pro 20X) sign-ups and upgrades because of Astra demand. A $100 Pro plan may still be available; Plus and the API remain open. A ChatGPT Pro seat is not the same as metered GPT-6 Astra API usage. For heavy Astra work, estimate token spend with this unofficial calculator (Standard $10 / $50 per 1M) rather than assuming a Pro subscription covers API volume. Confirm plan availability on OpenAI’s Pro help page or TechCrunch’s report.
Is this official OpenAI pricing?
No — this site is unofficial and not affiliated with OpenAI. Use it for rough planning, then verify on the official docs:
When does the 272K long-context cliff apply?
OpenAI’s pricing page defines short context as 272K input tokens or fewer and long context as more than 272K. The multipliers (2× input and cache rates, 1.5× output) apply to the whole request. This calculator triggers when uncached input + cached input + cache writes is greater than 272,000, because those three counts partition input_tokens. Output tokens do not trip it. Worked boundary math: Astra 272K pricing.
What are Batch, Flex, Fast, and Ultrafast?
On the pricing page, Batch and Flex are half the Standard card and Fast is double. Ultrafast is a separate card: $60 input, $6 cached input, $75 cache writes, and $300 output per 1M tokens at or under 272K. Swap tiers in the calculator or read the Astra API cost guide. Long-context prices for every tier are on the 272K pricing page.