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Anthropic: Claude Fable 5.1 vs OpenAI: GPT-6 Astra

Head-to-head API cost, context, and performance comparison. Synced at 1:41:56 PM.

Executive Summary

When evaluating Anthropic: Claude Fable 5.1 against OpenAI: GPT-6 Astra, the pricing structure is a key differentiator. Both models are remarkably similar in API costs.

However, when looking at raw reasoning capabilities, OpenAI: GPT-6 Astra leads with a statistical ELO score of 1497. For tasks involving complex logic, coding, or instruction-following, developers might prefer OpenAI: GPT-6 Astra, provided their budget allows for the API burn rate.

Raw Technical comparison

Metric
Anthropic: Claude Fable 5.1
OpenAI: GPT-6 Astra
Performance (ELO)
1497
1497
Input Cost / 1M
$10.00
$10.00
Output Cost / 1M
$50.00
$50.00
Context Window
1,000,000 tokens
1,050,000 tokens

Verdict

If you are looking for pure performance and capability, Tie is statistically superior. However, if API burn rate is the primary concern, Tie wins out aggressively in pricing.

People Also Ask

Is Anthropic: Claude Fable 5.1 cheaper than OpenAI: GPT-6 Astra?

No. OpenAI: GPT-6 Astra is the more cost-effective model, operating at a lower price point per 1 million tokens.

Which model has the larger context window?

The OpenAI: GPT-6 Astra model has the advantage in memory, offering a massive 1,050,000 token limit for document ingestion.

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