DeepSeek-V3.1 · deepinfra

DeepSeek-V3.1 is post-trained on the top of DeepSeek-V3.1-Base, which is built upon the original V3 base checkpoint through a two-phase long context extension approach, following the methodology outlined in the original DeepSeek-V3 report. We have expanded our dataset by collecting additional long documents and substantially extending both training phases. The 32K extension phase has been increased 10-fold to 630B tokens, while the 128K extension phase has been extended by 3.3x to 209B tokens. Additionally, DeepSeek-V3.1 is trained using the UE8M0 FP8 scale data format to ensure compatibility with microscaling data formats.

Base modelAll models on this baseAll models of the providerto the provider

Read also: DeepSeek API pricing: V4 Pro and V4 Flash at every provider

All DeepSeek models at every provider

Input, $/1M $0.25

Output, $/1M $0.95

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Last checked 04.11.2026 12:00:14 UTC

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