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Gemini 3.1 Pro Preview Customtools vs GLM 5.2

Output tokens cost $12.00 per million on Gemini 3.1 Pro Preview Customtools and $3.94 per million on GLM 5.2. Input tokens cost $2.00 per million on Gemini 3.1 Pro Preview Customtools and $1.13 per million on GLM 5.2. Cached input tokens are billed at $0.50 per million on Gemini 3.1 Pro Preview Customtools and $0.28 per million on GLM 5.2. Context lengths are 1,000,000 tokens on Gemini 3.1 Pro Preview Customtools and 1,000,000 tokens on GLM 5.2. Time to first token (TTFT) measured on AIHubMix is 11.5s on Gemini 3.1 Pro Preview Customtools and 0.6s on GLM 5.2. Measured output throughput is 98.3 tok/s on Gemini 3.1 Pro Preview Customtools and 44.5 tok/s on GLM 5.2.

GoogleGemini 3.1 Pro Preview CustomtoolsZ.AIGLM 5.2
+ Add model · 2/4
Google logo
Gemini 3.1 Pro Preview Customtools
Google · text, image, audio, video → text

gemini-3.1-pro-preview-customtools For users who build applications mixing bash and custom tools, the Gemini 3.1 Pro preview provides a separate endpoint accessible via the API call gemini-3.1-pro-preview-customtools. This endpoint is better at prioritizing your custom tools (for example, view_file or search_code). Please note that while gemini-3.1-pro-preview-customtools is optimized for agent workflows that use custom tools and Bash, you may experience quality fluctuations in some use cases that cannot benefit from these tools.

Input$2.00 /M
Output$12.00 /M
Details
Z.AI logo
GLM 5.2
Z.AI · text → text

GLM-5.2 is Z.ai’s flagship model for the era of long-horizon tasks. With a truly usable 1M-token context window, it can handle project-level engineering context, execute long-running tasks more reliably, follow engineering standards more consistently, and complete the full development workflow from requirements to multi-platform deployment in a single task.

Input$1.13 /M
Output$3.94 /M
Details

Pricing & Specifications

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

Gemini 3.1 Pro Preview Customtools
GLM 5.2
Input /M
$2.00
$1.13
Output /M
$12.00
$3.94
Cache read /M
$0.50
$0.28
Context length
1,000,000
1,000,000
Max output
64,000
128,000
Time to First Token
11.5 s
0.6 s
Throughput
98.3 tok/s
44.5 tok/s
Modalities
textimageaudiovideo
text
Supported Parameters
thinkingtoolsfunction callingstructured outputswebdeepsearchlong context
thinkingtoolsfunction callingstructured outputs
API Formats
chat_completions · gemini_api · claude_api
chat_completions · claude_api
Released
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June 16, 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.

gemini-3.1-pro-preview-customtoolsglm-5.2

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.

gemini-3.1-pro-preview-customtoolsglm-5.2

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.

GLM 5.2
$127 /mo
Gemini 3.1 Pro Preview Customtools
$300 /mo

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

FAQ

Which is cheaper: Gemini 3.1 Pro Preview Customtools, GLM 5.2?

GLM 5.2: $3.94/M output tokens; Gemini 3.1 Pro Preview Customtools: $12.00/M. Use the cost calculator above to estimate your own workload.

Which responds faster?

GLM 5.2: 0.6s 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?

Gemini 3.1 Pro Preview Customtools accepts 1,000,000 and GLM 5.2 accepts 1,000,000 input tokens. Maximum output per request is 64,000 tokens on Gemini 3.1 Pro Preview Customtools and 128,000 tokens on GLM 5.2.

Which one generates tokens faster?

Gemini 3.1 Pro Preview Customtools at 98.3 tok/s and GLM 5.2 at 44.5 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

Gemini 3.1 Pro Preview Customtools accepts text, image, audio and video input and supports thinking, tool calling, function calling, structured outputs, web search, deep search and long context; GLM 5.2 accepts text input and supports thinking, tool calling, function calling and structured outputs.

Can I call Gemini 3.1 Pro Preview Customtools and GLM 5.2 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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