Compare DeepSeek V4 Flash 0731 Fast from DeepSeek and Qwen3.8 Flash from Qwen on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
DeepSeek V4 Flash 0731 Fast
Qwen3.8 FlashDeepSeek V4 Flash 0731 Fast is a high-speed deployment of DeepSeek’s agentic model provided by Wafer, designed for coding, tool use, and high-volume agent workloads. It preserves the capabilities of V4 Flash 0731 while delivering much faster inference. Compared with V4 Pro, it prioritizes latency and execution efficiency.
Qwen3.8 Flash is Alibaba Cloud Qwen’s flagship native vision-language model for coding, office tasks, long-context reasoning, and agent workflows. It supports a 1M-token context, 128K output, web access, and tool calling. Compared with Qwen3.7-Plus, Qwen3.8-Flash significantly reduces training and inference costs—the training overhead is only about one-ninth of the former—while offering stronger capabilities on coding and office tasks.
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
Promotional prices show the discounted rate; see each model page for promotion windows.
Daily traffic served through AIHubMix — how demand for each model is trending.
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.
Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.
Estimate your monthly bill for the same workload on each model.
Monthly = daily × 30. Discounted rates applied where a promotion is active.
Qwen3.8 Flash: $0.38/M output tokens; DeepSeek V4 Flash 0731 Fast: $1.4/M. Use the cost calculator above to estimate your own workload.
Qwen3.8 Flash: 1494; DeepSeek V4 Flash 0731 Fast: 1483 (LMArena coding leaderboard).
DeepSeek V4 Flash 0731 Fast: 0.5s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
DeepSeek V4 Flash 0731 Fast accepts 1,000,000 and Qwen3.8 Flash accepts 1,000,000 input tokens. Maximum output per request is 384,000 tokens on DeepSeek V4 Flash 0731 Fast and 131,072 tokens on Qwen3.8 Flash.
DeepSeek V4 Flash 0731 Fast at 98.3 tok/s and Qwen3.8 Flash at 41.2 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
DeepSeek V4 Flash 0731 Fast accepts text input and supports tool calling, function calling, structured outputs and thinking; Qwen3.8 Flash accepts text, image and video input and supports tool calling, function calling, structured outputs, web search, long context and thinking.
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