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Anthropic: Claude Fable 5.1 vs OpenAI: GPT-5 Image

Head-to-head API cost, context, and performance comparison. Synced at 1:41:27 PM.

Executive Summary

When evaluating Anthropic: Claude Fable 5.1 against OpenAI: GPT-5 Image, the pricing structure is a key differentiator. OpenAI: GPT-5 Image is approximately 67% more cost-effective per 1 million tokens overall.

However, when looking at raw reasoning capabilities, OpenAI: GPT-5 Image leads with a statistical ELO score of 1498. For tasks involving complex logic, coding, or instruction-following, developers might prefer OpenAI: GPT-5 Image, provided their budget allows for the API burn rate.

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Raw Technical comparison

Metric
Anthropic: Claude Fable 5.1
OpenAI: GPT-5 Image
Performance (ELO)
1497
1498
Input Cost / 1M
$10.00
$10.00
Output Cost / 1M
$50.00
$10.00
Context Window
1,000,000 tokens
400,000 tokens

Verdict

If you are looking for pure performance and capability, OpenAI: GPT-5 Image is statistically superior. However, if API burn rate is the primary concern, OpenAI: GPT-5 Image wins out aggressively in pricing.

People Also Ask

Is Anthropic: Claude Fable 5.1 cheaper than OpenAI: GPT-5 Image?

No. OpenAI: GPT-5 Image is the more cost-effective model, operating at a lower price point per 1 million tokens.

Which model has the larger context window?

The Anthropic: Claude Fable 5.1 model has the advantage in memory, offering a massive 1,000,000 token limit for document ingestion.

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