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DeepSeek V4.1 Flash vs GPT-6 Astra

For a typical chat reply (2,000 tokens in, 400 out), GPT-6 Astra costs 134× as much as DeepSeek V4.1 Flash: $40.00 against $0.299 per 1,000 requests at list price on 2026-09-28.

DeepSeek V4.1 FlashGPT-6 Astra
Input, per 1M tokens$0.0295$10.00
Output, per 1M tokens$0.60$50.00
Context window1.05M1.05M
Classification or routing (600 tokens in, 10 out), per 1,000$0.0237$6.50
Chat reply (2,000 in, 400 out), per 1,000$0.299$40.00
Retrieval-augmented answer (8,000 in, 500 out), per 1,000$0.536$105
Confidence signalyesno
Tool callingyesyes
BANKING77, correct of 400316not measured

Which one should carry your traffic?

If DeepSeek V4.1 Flash answers your requests as well as GPT-6 Astra, moving that traffic saves 99% on chat-shaped requests. Averages cannot tell you whether it does for your requests. DeepSeek V4.1 Flash exposes a confidence signal, so Gimbix can let it answer first and hand unsure cases to GPT-6 Astra.

DeepSeek V4.1 Flash profile · GPT-6 Astra profile · Measure it on your traffic