---
title: Anthropic: Claude Fable Latest vs OpenAI: GPT-5.1
canonical: https://prompeteer.ai/compare/anthropic-claude-fable-latest-vs-openai-gpt-5-1
updated: 2026-07-25
source: OpenRouter /models
---

# Anthropic: Claude Fable Latest vs OpenAI: GPT-5.1

Anthropic: Claude Fable Latest vs OpenAI: GPT-5.1: Anthropic: Claude Fable Latest has the larger context window (1,000,000 tokens); OpenAI: GPT-5.1 is cheaper on input ($1.25 per 1M tokens); both support 3 input modalities. Data via OpenRouter /models, as of 2026-07-25.

| Metric | Anthropic: Claude Fable Latest | OpenAI: GPT-5.1 |
| --- | --- | --- |
| Context (tokens) | 1,000,000 | 400,000 |
| Input $/M | $10.00 | $1.25 |
| Output $/M | $50.00 | $10.00 |
| Input modalities | text, image, file | image, text, file |
| Output modalities | text | text |
| Model id | ~anthropic/claude-fable-latest | openai/gpt-5.1 |

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