DeepSeek V4.1 Flash 1017 (Ultra-fast) is the same DeepSeek V4.1 Flash 1017 model served from Fireworks' ultra-fast router, a premium low-latency endpoint that generates roughly 6-8x faster than the standard tier at 8x the standard price. Vision input, reasoning traces and the 1M-token context window are unchanged.
Pick it when response time matters more than cost: interactive coding assistants, live agents and anything a user is waiting on. It is served only from the ultra-fast router; if that endpoint cannot take a request, the request is refused rather than quietly answered by the slower standard tier.
Capabilities
How to use
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