Unofficial · Prices from OpenAI docs · Updated: 2026-09-05
GPT-6 Astra API Pricing Calculator
Paste your expected tokens. See Standard / Batch / Flex / Fast cost before you flip the model switch.
Calculate costHow to access GPT-6 Astra
Can you use GPT-6 Astra today?
Quick facts
gpt-6-astra model id and published limits.
- Model ID
- gpt-6-astra
- Context
- 1,050,000
- Max output
- 128,000
- Knowledge cutoff
- Apr 30, 2026
- Reasoning effort
- low · medium · high · xhigh · max
- Standard input
- $10 / 1M
- Cached input
- $1 / 1M
- Cache write
- $12.50 / 1M
- Standard output
- $50 / 1M
- Long context
- >272K input → whole request reprice (not input-only)
- Free tier
- Not supported
GPT-6 Astra vs Sol vs Claude Fable 5.1
In / out per 1M tokens. Competitor rows are snapshots — confirm live before you cite.
| Model | In / Out per 1M | Notes |
|---|---|---|
| GPT-6 Astra | $10 / $50 | Free API tier unsupported |
| GPT-5.6 Sol (promo, verify) | ~$4 / $20 | Confirm live before you cite |
| Claude Fable 5.1 | ~$10 / $50 | Often cited — verify Anthropic |
| Gemini 3.8 Flash | $0.75 / $3.75 intro | Thru 2026-12-31, then $1.50 / $7.50 |
Competitor prices change. We link out rather than scrape. For a live sortable table see the LLM Pricing Leaderboard. Why ~2.5× vs Sol? GPT-6 Astra vs Sol pricing.
FAQ
- How much does GPT-6 Astra API cost?
- Standard text rates are $10 per 1M input tokens and $50 per 1M output tokens. Cached input is $1 per 1M. Batch and Flex are 50% of Standard; Fast is 2×.
- Is there a free tier for gpt-6-astra?
- No. OpenAI lists Free tier as not supported for this model.
- What’s the model id?
- gpt-6-astra
- Why is my bill higher than the calculator?
- Tool calls, Fast mode, prompts over 272K input, and cache writes can raise cost. This tool estimates text tokens only.
- ChatGPT Plus includes Astra API?
- No. Subscription and API billing are separate. ChatGPT subscription vs API billing →
- Batch vs Flex?
- Same 50% off. Batch = async batching; Flex = sync half-price with higher latency. Prefer Flex for agent evals / interactive flows where Batch won't fit. OpenAI Batch vs Flex →
- Why is GPT-6 Astra ~2.5× GPT-5.6 Sol?
- On published list rates Astra is about $10 / $50 per 1M vs Sol about $4 / $20 — roughly 2.5×. Confirm live on official pages and the LLM Pricing Leaderboard. Astra vs Sol list rates →
Not affiliated with OpenAI. Calculator is an estimate. Always verify on the official pricing and model pages before production spend. Rates checked 2026-09-05.
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From the AI Cost Gate guides
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Astra pricing notes
Same ~50% off Standard — Batch is async, Flex is sync
ChatGPT plans are not OpenAI API credit
List-rate gap vs GPT-5.6 Sol, from the shared price table