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AI model comparison

Claude Fable 5 vs Gemini 3.1 Pro Preview Custom Tools

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

Claude Fable 5 from Anthropic lists 1M context, 128K maximum output, $10.00 input per 1M tokens, $50.00 output per 1M tokens. 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. Compare the inputs, outputs and deployment options below to see which fits your workflow.

Side-by-sideCapabilities and practical differences

Anthropic

Claude Fable 5

Claude Fable 5 from Anthropic: Claude model for creative writing, analysis, and controlled agent workflows.

Context
1M
Max output
128K
Input / 1M tokens
$10.00
Output / 1M tokens
$50.00

Accepts

  • Text input
  • Image input
  • PDF input

Produces

  • Text output
Full model profilegithub.com ↗
VS

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 ↗

At a glance

Key differences

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

Claude Fable 5

  • Maximum output: 128K

Gemini 3.1 Pro Preview Custom Tools

  • Context capacity: 1.05M
  • Input price: $2.00
  • Output price: $12.00

Context capacity

Higher listed limit

Claude Fable 5:1M

Gemini 3.1 Pro Preview Custom Tools:1.05M

Gemini 3.1 Pro Preview Custom Tools

Maximum output

Higher listed limit

Claude Fable 5:128K

Gemini 3.1 Pro Preview Custom Tools:65.54K

Claude Fable 5

Input price

Lower listed token rate

Claude Fable 5:$10.00

Gemini 3.1 Pro Preview Custom Tools:$2.00

Gemini 3.1 Pro Preview Custom Tools

Output price

Lower listed token rate

Claude Fable 5:$50.00

Gemini 3.1 Pro Preview Custom Tools:$12.00

Gemini 3.1 Pro Preview Custom Tools

Specifications

Pricing, limits and capabilities

Specifications for Claude Fable 5 and Gemini 3.1 Pro Preview Custom Tools. Higher limits and lower prices describe these figures only.
SpecificationClaude Fable 5Gemini 3.1 Pro Preview Custom Tools
ProviderAnthropicGoogle
Listed pricing routeAnthropicGoogle
Model familyclaude-fablegemini-pro
Accepted inputstext, image, pdftext, image, video, audio, pdf
Produced outputstexttext
Context window1M1.05MHigher
Max output128KHigher65.54K
Input price / 1M$10.00$2.00Lower
Output price / 1M$50.00$12.00Lower
Reasoning modeDocumentedDocumented
Tool callingDocumentedDocumented
Image inputDocumentedDocumented
Audio inputNot documentedDocumented
Structured outputNot documentedDocumented
LicenseProprietaryProprietary

Workload guidance

Which model should you choose?

Consider Claude Fable 5 if you need larger maximum output. Consider Gemini 3.1 Pro Preview Custom Tools if you need larger context or a lower listed input rate or a lower listed output rate. 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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