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GLM 5.2 Fast Preview vs Qwen3.8 Max Preview

Compare GLM 5.2 Fast Preview from Z.AI and Qwen3.8 Max Preview 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.

Z.AIGLM 5.2 Fast PreviewQwenQwen3.8 Max Preview
+ Add model · 2/4
Z.AI logo
GLM 5.2 Fast Preview
Z.AI · text → text

GLM-5.2-Fast-Preview is the high-speed version of Zhipu AI’s flagship model GLM-5.2, supporting a 1M ultra-long context. The model’s capabilities are aligned with the GLM-5.2 standard version, offering logical reasoning, long-text understanding, and code generation. Through inference acceleration optimizations, output TPS can reach 1.5–2× that of the GLM-5.2 standard version, significantly improving output speed. It is suitable for scenarios sensitive to output speed, such as real-time dialogue, multi-turn Agent calls, and streaming code generation.

Input$2.25 /M
Output$7.89 /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.

GLM 5.2 Fast Preview
Qwen3.8 Max Preview
Input /M
$2.25
$0.34
Output /M
$7.89
$1.01
Cache read /M
$0.56
$0.03
Context length
1,000,000
983,616
Max output
128,000
131,072
Time to First Token
2.0 s
2.4 s
Throughput
37.8 tok/s
48.1 tok/s
Modalities
text
textimage
Supported Parameters
thinkingtoolsfunction callingstructured outputs
toolsfunction callingstructured outputsweblong contextthinking
API Formats
chat_completions · claude_api
Released
June 16, 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.

glm-5.2-fast-previewqwen3.8-max-preview

Tokens / day

-

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-5.2-fast-previewqwen3.8-max-preview

Throughput (tok/s)

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TTFT (s)

-

Uptime (%)

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LMArena Benchmarks

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

Text
glm-5.2-fast-previewqwen3.8-max-preview
14201460150015401580
Overall
14701481
Coding
15051520
Math
14751504
Hard prompts
14881506
Instruction following
14621478
Multi-turn
14701496
Creative writing
14501469
Longer query
14791497
Chinese
15161545
English
14771486
WebDev Arena
glm-5.2-fast-previewqwen3.8-max-preview
15201580164017001760
Overall
15821669
React
15941678
HTML
15371628
Gaming
16171733
Simulations
16061665
Data analytics
15421614

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.

Qwen3.8 Max Preview
$35.49 /mo
GLM 5.2 Fast Preview
$254 /mo

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

FAQ

Which is cheaper: GLM 5.2 Fast Preview, Qwen3.8 Max Preview?

Qwen3.8 Max Preview: $1.01/M output tokens; GLM 5.2 Fast Preview: $7.89/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

Qwen3.8 Max Preview: 1520; GLM 5.2 Fast Preview: 1505 (LMArena coding leaderboard).

Which responds faster?

GLM 5.2 Fast Preview: 2.0s 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?

GLM 5.2 Fast Preview accepts 1,000,000 and Qwen3.8 Max Preview accepts 983,616 input tokens. Maximum output per request is 128,000 tokens on GLM 5.2 Fast Preview and 131,072 tokens on Qwen3.8 Max Preview.

Which one generates tokens faster?

Qwen3.8 Max Preview at 48.1 tok/s and GLM 5.2 Fast Preview at 37.8 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 5.2 Fast Preview accepts text input and supports thinking, tool calling, function calling and structured outputs; 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 GLM 5.2 Fast Preview 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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