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297•09/01/2026, 21:15•2 min read

Introducing Claude Fable 5.1

Introducing Claude Fable 5.1
Executive TL;DR30s read

Claude Fable 5.1 shows significant improvements over previous models, particularly in reducing token usage costs.

Introducing Claude Fable 5.1

Claude Fable 5.1 demonstrates significant improvements compared to previous models such as Fable 5 and Opus 5. According to benchmark results, the new model outperforms its predecessors due to a fourfold reduction in the price of cached tokens. Now, cache reads cost $0.25 per million tokens, making it on average 25% cheaper than Fable 5.

Additionally, the number of reasoning tokens seems to have increased, which could positively impact the model's performance. Access to Claude Fable 5.1 is already being rolled out.

Why It Matters

Claude Fable 5.1 offers significant advantages in cost and performance, making it an attractive choice for developers and companies looking to leverage advanced AI technologies.

Why it matters

Analysis

This new model provides a reduction in AI usage costs, making the technology more accessible to a wider range of users.

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