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Model comparison

Same task, different trade-offs.

We are not looking for an absolute winner. The comparison shows which model better suits your work, budget and required speed.

Models being compared

Model A Anthropic

Claude Fable 5.1

Data from September 27, 2026
Published September 1, 2026

Long and demanding tasks

A variant for demanding work where longer processing times and higher costs are acceptable.

Model B Google

Gemini 3.8 Flash

Data from September 27, 2026
Published September 2, 2026

Documents, media and automation

Processes text, images, audio and video; the output is text.

Price, speed and usage

Costs
Model A · Claude Fable 5.1

$10 input / $50 output per million tokens in standard API mode.

Model B · Gemini 3.8 Flash

$0.75 input / $3.75 output per million tokens through December 31, 2026. From January 1, 2027: $1.50 / $7.50.

Speed
Model A · Claude Fable 5.1

The provider ranks it among the slower models in the Claude family.

Model B · Gemini 3.8 Flash

We have not independently measured speed on a comparable basis.

Availability
Model A · Claude Fable 5.1

Claude API, Amazon Bedrock, Google Cloud and Microsoft Foundry

Model B · Gemini 3.8 Flash

Gemini API and Google AI Studio

Input length
Model A · Claude Fable 5.1

1 million tokens; output capped at 128 thousand tokens.

Model B · Gemini 3.8 Flash

1,048,576 input tokens; output capped at 65,536 tokens.

Inputs
Model A · Claude Fable 5.1

Text and images → text

Model B · Gemini 3.8 Flash

Text, images, video, audio and PDF → text

Claude Fable 5.1

Use when…

  • Complex tasks with multiple sequential steps
  • Working with extensive context and code

Choose another model when…

  • When you need the fastest possible response or the lowest costs.

Gemini 3.8 Flash

Use when…

  • Analysis of documents, audio and video
  • Programming and multi-step business tasks

Choose another model when…

  • A different model is needed to generate images or audio directly.

Original sources

Open the reference materials for each model