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GLM 5.3 Flash vs DeepSeek V4 Flash 0731

Compare GLM 5.3 Flash from Z.AI and DeepSeek V4 Flash 0731 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.

Z.AIGLM 5.3 FlashDeepSeekDeepSeek V4 Flash 0731
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Z.AI logo
GLM 5.3 Flash
Z.AI · text, image, video → text

GLM-5.3-Flash is a high-efficiency multimodal model from Z.AI. It supports a context window of roughly 1 million tokens, along with text, image, and video inputs, and includes tool-calling capabilities. It is primarily designed for coding agents, complex reasoning, and long-horizon software engineering tasks. Built on the existing GLM technology stack, the model has been further post-trained and optimized to deliver strong performance while placing greater emphasis on inference efficiency, responsiveness, and cost.The model is offered at a limited-time 50% discount; users are welcome to try it.

Input$0.11$0.06 /M
Output$0.39$0.20 /M
Cache read$0.03$0.01 /M
Details
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
Cache read$0.03 /M
Details

Pricing & Specifications

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

GLM 5.3 Flash
DeepSeek V4 Flash 0731
Input /M
$0.11$0.06−50%
$0.14
Output /M
$0.39$0.20−50%
$0.28
Cache read /M
$0.03$0.01−50%
$0.03
Context length
1,000,000
1,000,000
Max output
128,000
384,000
Time to First Token
4.1 s
1.4 s
Throughput
549.0 tok/s
377.4 tok/s
Modalities
textimagevideo
text
Supported Parameters
thinkingtoolsfunction callingstructured outputs
toolsfunction callingstructured outputsthinking
API Formats
chat_completions · claude_api
Released
August 26, 2026
July 31, 2026

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.

glm-5.3-flashdeepseek-v4-flash-0731

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.

glm-5.3-flashdeepseek-v4-flash-0731

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
glm-5.3-flashdeepseek-v4-flash-0731
1380144015001560
Overall
14361469
Coding
14831531
Math
14261426
Hard prompts
14591495
Instruction following
14281465
Multi-turn
14521453
Creative writing
14081433
Longer query
14481474
Chinese
14731473
English
14451472

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.

GLM 5.3 Flash
$13$6.34 /mo
DeepSeek V4 Flash 0731
$12.78 /mo

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

FAQ

Which is cheaper: GLM 5.3 Flash, DeepSeek V4 Flash 0731?

GLM 5.3 Flash: $0.20/M output tokens; DeepSeek V4 Flash 0731: $0.28/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

GLM 5.3 Flash: 1531; DeepSeek V4 Flash 0731: 1483 (LMArena coding leaderboard).

Which responds faster?

DeepSeek V4 Flash 0731: 1.4s 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?

GLM 5.3 Flash accepts 1,000,000 and DeepSeek V4 Flash 0731 accepts 1,000,000 input tokens. Maximum output per request is 128,000 tokens on GLM 5.3 Flash and 384,000 tokens on DeepSeek V4 Flash 0731.

Which one generates tokens faster?

GLM 5.3 Flash at 549.0 tok/s and DeepSeek V4 Flash 0731 at 377.4 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

GLM 5.3 Flash accepts text, image and video input and supports thinking, tool calling, function calling and structured outputs; DeepSeek V4 Flash 0731 accepts text input and supports tool calling, function calling, structured outputs and thinking.

Can I call GLM 5.3 Flash and DeepSeek V4 Flash 0731 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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