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DeepSeek V4 Flash 0731 vs Qwen3.8 Max Preview

Output tokens cost $0.28 per million on DeepSeek V4 Flash 0731 and $1.01 per million on Qwen3.8 Max Preview. Input tokens cost $0.14 per million on DeepSeek V4 Flash 0731 and $0.34 per million on Qwen3.8 Max Preview. Cached input tokens are billed at $0.03 per million on DeepSeek V4 Flash 0731 and $0.03 per million on Qwen3.8 Max Preview. Context lengths are 1,000,000 tokens on DeepSeek V4 Flash 0731 and 983,616 tokens on Qwen3.8 Max Preview. Time to first token (TTFT) measured on AIHubMix is 1.0s on DeepSeek V4 Flash 0731 and 2.4s on Qwen3.8 Max Preview. Measured output throughput is 176.1 tok/s on DeepSeek V4 Flash 0731 and 48.1 tok/s on Qwen3.8 Max Preview. On the LMArena coding leaderboard DeepSeek V4 Flash 0731 scores 1483 and Qwen3.8 Max Preview scores 1520.

DeepSeekDeepSeek V4 Flash 0731QwenQwen3.8 Max Preview
+ Add model · 2/4
DeepSeek logo
DeepSeek V4 Flash 0731
DeepSeek · text → text

DeepSeek-V4-Flash-0731(deepseek-v4-flash-0731) is an open-source MoE large language model developed by the Chinese AI company DeepSeek, with support for a million-token context window. It is designed for coding, complex reasoning, tool use, agentic workflows, and long-document processing. Its advantages include strong performance with fewer active parameters and improved efficiency through DSpark speculative decoding. Compared with DeepSeek V4-Flash Preview, it offers significantly stronger coding and agent capabilities, while outperforming DeepSeek V4-Pro Preview on several benchmarks with fewer active parameters.

Input$0.14 /M
Output$0.28 /M
Details
Qwen logo
Qwen3.8 Max Preview
Qwen · text, image → text

Qwen 3.8 Max Preview(Qwen3.8-Max-Preview) is the latest-generation foundation model in the Qwen family, packing 2.4T parameters and still evolving. Compared with the previous flagship Qwen 3.7 Max, it delivers major gains in core capabilities like Coding and Cowork (professional productivity), with world-leading performance on complex, long-horizon tasks such as full-stack development, data analysis, and Office workflows. Launch offer: Credits are consumed at just 20% of the standard rate, effectively 5× your usage. Limited time only.

Input$0.34 /M
Output$1.01 /M
Details

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

DeepSeek V4 Flash 0731
Qwen3.8 Max Preview
Input /M
$0.14
$0.34
Output /M
$0.28
$1.01
Cache read /M
$0.03
$0.03
Context length
1,000,000
983,616
Max output
384,000
131,072
Time to First Token
1.0 s
2.4 s
Throughput
176.1 tok/s
48.1 tok/s
Modalities
text
textimage
Supported Parameters
toolsfunction callingstructured outputsthinking
toolsfunction callingstructured outputsweblong contextthinking
API Formats
chat_completions · claude_api
Released
July 31, 2026
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Promotional prices show the discounted rate; see each model page for promotion windows.

Activity Past 30 Days

Daily traffic served through AIHubMix — how demand for each model is trending.

deepseek-v4-flash-0731qwen3.8-max-preview

Tokens / day

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Requests / day

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Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

deepseek-v4-flash-0731qwen3.8-max-preview

Throughput (tok/s)

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TTFT (s)

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Uptime (%)

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LMArena Benchmarks

LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.

Text
deepseek-v4-flash-0731qwen3.8-max-preview
1380144015001560
Overall
14361481
Coding
14831520
Math
14251504
Hard prompts
14591506
Instruction following
14281478
Multi-turn
14531496
Creative writing
14081469
Longer query
14481497
Chinese
14751545
English
14451486

Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.

Cost calculator

Estimate your monthly bill for the same workload on each model.

DeepSeek V4 Flash 0731
$12.78 /mo
Qwen3.8 Max Preview
$35.49 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: DeepSeek V4 Flash 0731, Qwen3.8 Max Preview?

DeepSeek V4 Flash 0731: $0.28/M output tokens; Qwen3.8 Max Preview: $1.01/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

Qwen3.8 Max Preview: 1520; DeepSeek V4 Flash 0731: 1483 (LMArena coding leaderboard).

Which responds faster?

DeepSeek V4 Flash 0731: 1.0s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.

How large is each context window?

DeepSeek V4 Flash 0731 accepts 1,000,000 and Qwen3.8 Max Preview accepts 983,616 input tokens. Maximum output per request is 384,000 tokens on DeepSeek V4 Flash 0731 and 131,072 tokens on Qwen3.8 Max Preview.

Which one generates tokens faster?

DeepSeek V4 Flash 0731 at 176.1 tok/s and Qwen3.8 Max Preview at 48.1 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

DeepSeek V4 Flash 0731 accepts text input and supports tool calling, function calling, structured outputs and thinking; Qwen3.8 Max Preview accepts text and image input and supports tool calling, function calling, structured outputs, web search, long context and thinking.

Can I call DeepSeek V4 Flash 0731 and Qwen3.8 Max Preview with the same API key?

Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.

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