Introducing Claude Fable 5.1

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
AnalysisThis new model provides a reduction in AI usage costs, making the technology more accessible to a wider range of users.
Discuss in community
Share your questions and insights with developers
Related in Ecosystem
Practical guides, core terminology, and agent skills
Claude Sonnet 4.6 vs GPT-5.5 vs Gemini 3.1 Pro: 2026 model comparison
Every few weeks, a new model comes out, and every time the same questions arise: should I switch? what changed what to pay for?
Reddit user explains why Claude Code weekly limits are burning almost 4x faster
A Reddit user compared token usage across two weeks and found that each 1% of Claude Code's weekly limit now yields far fewer output tokens, pointing to subagents, reasoning time, and UI refresh requests as likely causes.
Claude Becomes Smarter
Claude becomes smarter, indicating possible improvements in the model's capabilities.
GPT Image Generative Models Prompting Guide
OpenAI's gpt-image generative models are designed to produce production-quality visuals and fully controllable creative workflows. They are suitable for both professional design ta...