---
title: Anthropic: Claude Fable Latest vs Google: Gemini 3.1 Pro Preview Custom Tools
canonical: https://prompeteer.ai/compare/anthropic-claude-fable-latest-vs-google-gemini-3-1-pro-preview-customtools
updated: 2026-07-25
source: OpenRouter /models
---

# Anthropic: Claude Fable Latest vs Google: Gemini 3.1 Pro Preview Custom Tools

Anthropic: Claude Fable Latest vs Google: Gemini 3.1 Pro Preview Custom Tools: Google: Gemini 3.1 Pro Preview Custom Tools has the larger context window (1,048,576 tokens); Google: Gemini 3.1 Pro Preview Custom Tools is cheaper on input ($2.00 per 1M tokens); Google: Gemini 3.1 Pro Preview Custom Tools supports more input modalities (text, audio, image, video, file). Data via OpenRouter /models, as of 2026-07-25.

| Metric | Anthropic: Claude Fable Latest | Google: Gemini 3.1 Pro Preview Custom Tools |
| --- | --- | --- |
| Context (tokens) | 1,000,000 | 1,048,576 |
| Input $/M | $10.00 | $2.00 |
| Output $/M | $50.00 | $12.00 |
| Input modalities | text, image, file | text, audio, image, video, file |
| Output modalities | text | text |
| Model id | ~anthropic/claude-fable-latest | google/gemini-3.1-pro-preview-customtools |

Source: Data via OpenRouter /models — as of 2026-07-25.