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cloud.google.com·6d ago
Cloud & Infrastructure
The New Stack·Jul 29·5 min read
Opus 5 vs. Fable 5: What does half the price buy?
TL;DR
Anthropic's Claude Opus 5 offers similar capabilities to Fable 5 at half the cost, priced at $5 per million input tokens. However, it is not overall more capable than Fable 5.
✦ Why It Matters
Consider testing Opus 5 for cost-effective AI solutions while evaluating its performance against Fable 5.
Key Takeaways
- Use Opus 5 for cost-effective detail-oriented tasks.
- Leverage Fable 5 for deeper analytical insights.
- Combine both models for comprehensive problem-solving.
- Review outputs with a human expert for accuracy.
Full Summary
Claude Opus 5 was released at a price of $5 per million input tokens, significantly cheaper than Fable 5, which costs $10. Both models were tested on reasoning tasks, with Opus 5 outperforming Fable 5 in detail-oriented tasks, such as bug diagnosis and analytics, while Fable excelled in reasoning and understanding complex data.
In three tests, Opus identified 26 out of 27 issues in a financial statement, while Fable found 24, but Fable provided deeper insights into the data. Opus 5's total cost across tests was $6.67, compared to Fable's $11.76.
The findings suggest that while Opus 5 is more cost-effective for fact-checking, Fable 5 is better for analytical reasoning, indicating a complementary use of both models for optimal results.