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

Vercel's AI Gateway now offers DeepSeek V4.1 Flash 1017 Ultrafast through Fireworks, an accelerated serverless endpoint that can generate upwards of 1,000 tokens per second. The model, which serves the October 17 update of DeepSeek V4.1 Flash, has a 1M-token context window and is available in public preview without a waitroom or session time limit, called via the model name deepseek/deepseek-v4.1-flash-1017-ultrafast. Vercel positions the release for interactive coding, reasoning and agentic workflows, and AI Gateway reflects provider pricing with no markup and no platform fee on inference, including Bring Your Own Key requests.

DeepSeek V4.1 Flash 1017 Ultrafast https://vercel.com/ai-gateway/models/deepseek-v4.1-flash-1017-ultrafast is now available on AI Gateway through Fireworks. This model can generate upwards of 1,000 tokens per second . Ultrafast serves the October 17 update of DeepSeek V4.1 Flash through Fireworks' accelerated serverless endpoint. It is suited to interactive coding, reasoning, and agentic workflows where applications need to generate output and move to the next step quickly. The model has a 1M-token context window for working with large codebases and long inputs. It is available in public preview without a waitroom or session time limit. Use it by setting deepseek/deepseek-v4.1-flash-1017-ultrafast as the model name: To use it in Claude Code, Codex, Cursor, and more, install the latest Vercel CLI and run setup: Then select deepseek/deepseek-v4.1-flash-1017-ultrafast in the agent. See the coding agents guide https://vercel.com/docs/ai-gateway/coding-agents for details. Try DeepSeek V4.1 Flash 1017 Ultrafast in the model playground https://vercel.com/ai-gateway/models/deepseek-v4.1-flash-1017-ultrafast . AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in custom reporting https://vercel.com/changelog/custom-reporting-ai-gateway , Zero Data Retention support https://vercel.com/blog/zdr-on-ai-gateway , budgets for API keys https://vercel.com/docs/ai-gateway/authentication-and-byok/api-keys , routing rules https://vercel.com/docs/ai-gateway/models-and-providers/routing-rules , and more. AI Gateway reflects provider pricing with no markup and does not charge a platform fee on inference, including on Bring Your Own Key https://vercel.com/docs/ai-gateway/authentication-and-byok/byok BYOK requests. You can view all language models https://vercel.com/ai-gateway/models?type=text available on AI Gateway.