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AI model comparison

Gemini 3.1 Pro Preview Custom Tools vs Kimi K3

Compare pricing, context limits, supported inputs and deployment options to choose a model for your workflow.

Gemini 3.1 Pro Preview Custom Tools from Google lists 1.05M context, 65.54K maximum output, $2.00 input per 1M tokens, $12.00 output per 1M tokens. Kimi K3 from Moonshot AI lists 1.05M context, 1.05M maximum output, $3.00 input per 1M tokens, $15.00 output per 1M tokens. Compare the inputs, outputs and deployment options below to see which fits your workflow.

Side-by-sideCapabilities and practical differences

Google

Gemini 3.1 Pro Preview Custom Tools

Gemini 3.1 Pro Preview Custom Tools from Google: Advanced Gemini model for complex reasoning, coding, and multimodal analysis.

Context
1.05M
Max output
65.54K
Input / 1M tokens
$2.00
Output / 1M tokens
$12.00

Accepts

  • Text input
  • Image input
  • Video input
  • Audio input
  • PDF input

Produces

  • Text output
Full model profilegithub.com ↗
VS

Moonshot AI

Kimi K3

Kimi K3 from Moonshot AI: Multimodal Kimi model with 1M context and toggleable max-effort thinking for long-horizon agent work.

Context
1.05M
Max output
1.05M
Input / 1M tokens
$3.00
Output / 1M tokens
$15.00

Accepts

  • Text input
  • Image input
  • Video input

Produces

  • Text output
Full model profileplatform.kimi.ai ↗

At a glance

Key differences

Compare the available figures below, then try both models on the work you need to do.

Gemini 3.1 Pro Preview Custom Tools

  • Input price: $2.00
  • Output price: $12.00

Kimi K3

  • Maximum output: 1.05M

Context capacity

Higher listed limit

Gemini 3.1 Pro Preview Custom Tools:1.05M

Kimi K3:1.05M

Same value

Maximum output

Higher listed limit

Gemini 3.1 Pro Preview Custom Tools:65.54K

Kimi K3:1.05M

Kimi K3

Input price

Lower listed token rate

Gemini 3.1 Pro Preview Custom Tools:$2.00

Kimi K3:$3.00

Gemini 3.1 Pro Preview Custom Tools

Output price

Lower listed token rate

Gemini 3.1 Pro Preview Custom Tools:$12.00

Kimi K3:$15.00

Gemini 3.1 Pro Preview Custom Tools

Specifications

Pricing, limits and capabilities

Specifications for Gemini 3.1 Pro Preview Custom Tools and Kimi K3. Higher limits and lower prices describe these figures only.
SpecificationGemini 3.1 Pro Preview Custom ToolsKimi K3
ProviderGoogleMoonshot AI
Listed pricing routeGoogleMoonshot AI
Model familygemini-prokimi-k3
Accepted inputstext, image, video, audio, pdftext, image, video
Produced outputstexttext
Context window1.05M1.05M
Max output65.54K1.05MHigher
Input price / 1M$2.00Lower$3.00
Output price / 1M$12.00Lower$15.00
Reasoning modeDocumentedDocumented
Tool callingDocumentedDocumented
Image inputDocumentedDocumented
Audio inputDocumentedNot documented
Structured outputDocumentedDocumented
LicenseProprietaryOpen weights

Workload guidance

Which model should you choose?

Consider Gemini 3.1 Pro Preview Custom Tools if you need a lower listed input rate or a lower listed output rate. Consider Kimi K3 if you need larger maximum output. Kimi K3 offers downloadable weights; Gemini 3.1 Pro Preview Custom Tools is listed as a proprietary model. Compare licence terms and operating costs before choosing a deployment. Test both on the same representative examples and judge the output against your acceptance criteria. Include tool failures, retries and the time to a completed task.

Documentation and model profiles

Explore each model’s features, API requirements and licence terms in the sources below.

Questions people ask

It brings together documented inputs and outputs, token limits, deployment terms and available pricing. When both models have source-linked, verified results on a shared benchmark, those results are shown with their individual sources. The comparison is a starting point for evaluating your own workload.

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