GPT-6 Astra vs DeepSeek V4 Pro
Facts only. This page does not pick a winner. For a picked winner, see the use case comparison on Tools.
| GPT-6 Astra | DeepSeek V4 Pro | |
|---|---|---|
| API model IDs | gpt-6-astra | deepseek-v4-pro, deepseek-v4-pro-0813 |
| Context window | 1,050,000 | 1,000,000 |
| Lifecycle | active | active |
| License | proprietary | open-weights |
| Trains on API data | No | Yes |
| Zero data retention | on-request | no |
| Input per 1M tokens | $10 (verified 2026-09-08) | $1.32 (verified 2026-09-08) |
Frequently asked questions
- Which has the larger context window, GPT-6 Astra or DeepSeek V4 Pro?
- GPT-6 Astra holds 1,050,000 tokens and DeepSeek V4 Pro holds 1,000,000. GPT-6 Astra holds more. The context window counts the prompt, any attached files, and the reply together.
- Which is cheaper, GPT-6 Astra or DeepSeek V4 Pro?
- Per million input tokens, GPT-6 Astra was $10 (verified 2026-09-08) and DeepSeek V4 Pro was $1.32 (verified 2026-09-08). DeepSeek V4 Pro is cheaper per input token. Output tokens cost $50 and $3.96 respectively, and output volume usually decides the bill.
- Does GPT-6 Astra or DeepSeek V4 Pro train on API data?
- GPT-6 Astra does not train on API data by default, and DeepSeek V4 Pro trains on API data by default. Zero data retention is on-request for GPT-6 Astra and no for DeepSeek V4 Pro. Verified 2026-09-08 and 2026-09-08 against the providers' own documentation.
- Is GPT-6 Astra or DeepSeek V4 Pro being retired?
- GPT-6 Astra is active. DeepSeek V4 Pro is active. Lifecycle checked 2026-09-08 and 2026-09-08. Pin a dated snapshot ID rather than an alias if a retirement would break you.