Back to Value Frontier

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

Head-to-head API cost, context, and performance comparison. Synced at 1:36:46 PM.

Executive Summary

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

However, when looking at raw reasoning capabilities, Anthropic: Claude Fable 5.1 leads with a statistical ELO score of 1497. For tasks involving complex logic, coding, or instruction-following, developers might prefer Anthropic: Claude Fable 5.1, provided their budget allows for the API burn rate.

Raw Technical comparison

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

No. Anthropic: Claude Fable 5.1 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.

Related Comparisons

Compare OpenAI: GPT-6 Astra vs Apodex: Apodex 1.1 Mini (free)Compare OpenAI: GPT-6 Astra vs inclusionAI: Ling 3.0 Flash Sante (free)Compare OpenAI: GPT-6 Astra vs Cohere: North Mini Code (free)Compare OpenAI: GPT-6 Astra vs NVIDIA: Nemotron 3 Nano Omni (free)