Models

DeepSeek V3 Fast vs DeepSeek V4 Flash

Compare DeepSeek V3 Fast from DeepSeek and DeepSeek V4 Flash from DeepSeek on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.

DeepSeekDeepSeek V3 FastDeepSeekDeepSeek V4 Flash
DeepSeek logo
DeepSeek V3 Fast
DeepSeek · text → text

V3 Ultra-Fast Version,The current price is a limited-time 50% discount and will return to the original price on July 31st. The original price is: input: $0.55/M, output: $2.2/M. The model provider is the Sophnet platform. DeepSeek V3 Fast is a high-TPS, ultra-fast version of DeepSeek V3 0324, featuring full-precision (non-quantized) performance, enhanced code and math capabilities, and faster responses! DeepSeek V3 0324 is a powerful Mixture-of-Experts (MoE) model with a total parameter count of 671B, activating 37B parameters per token. It adopts Multi-Head Latent Attention (MLA) and the DeepSeekMoE architecture to achieve efficient inference and economical training costs. It innovatively implements a load balancing strategy without auxiliary loss and sets multi-token prediction training targets to enhance performance. The model is pre-trained on 14.8 trillion diverse, high-quality tokens and further optimized through supervised fine-tuning and reinforcement learning stages to fully realize its capabilities. Comprehensive evaluations show that DeepSeek V3 outperforms other open-source models and rivals leading closed-source models in performance. The entire training process only requires 2.788M H800 GPU hours and remains highly stable, with no irrecoverable loss spikes or rollbacks.

Input$0.56 /M
Output$2.24 /M
DeepSeek logo
DeepSeek V4 Flash
DeepSeek · text → text

DeepSeek V4 Flash 0423 is DeepSeek's efficiency-optimized Mixture-of-Experts text model, designed for fast inference and workflows requiring tool use, function calling, and structured outputs. It features 284B total parameters with 13B activated parameters and supports a 1M-token context window with cost-effective pricing.

Input$0.464 /M
Output$0.928 /M
Cache read$0.0039 /M

Pricing & Specifications

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

DeepSeek V3 Fast
DeepSeek V4 Flash
Input /M
$0.56
$0.464
Output /M
$2.24
$0.928
Cache read /M
-
$0.0039
Context length
0
1,000,000
Max output
0
0
Time to First Token
1.5 s
0.7 s
Throughput
150.0 tok/s
59.0 tok/s
Modalities
text
text
Supported Parameters
toolsfunction callingstructured outputs
toolsfunction callingstructured outputs
API Formats
Released
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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-V3-Fastdeepseek-v4-flash

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-V3-Fastdeepseek-v4-flash

Throughput (tok/s)

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TTFT (s)

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Uptime (%)

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Cost calculator

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

DeepSeek V4 Flash
$41.76 /mo
DeepSeek V3 Fast
$67.20 /mo

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

FAQ

Which is cheaper: DeepSeek V3 Fast, DeepSeek V4 Flash?

DeepSeek V4 Flash: $0.928/M output tokens; DeepSeek V3 Fast: $2.24/M. Use the cost calculator above to estimate your own workload.

Which responds faster?

DeepSeek V4 Flash: 0.7s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.

Which one generates tokens faster?

DeepSeek V3 Fast at 150.0 tok/s and DeepSeek V4 Flash at 59.0 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 V3 Fast accepts text input and supports tool calling, function calling and structured outputs; DeepSeek V4 Flash accepts text input and supports tool calling, function calling and structured outputs.

Can I call DeepSeek V3 Fast and DeepSeek V4 Flash 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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