🤖Claude Fable 5.1 Released with 52.6% Terminal-Bench-Science Score
Claude Fable 5.1: 52.6% Terminal-Bench-Science Score
TL;DR
Claude Fable 5.1, released on Sept 1, boasts a 52.6% Terminal-Bench-Science score, up from 24.7% for Fable 5. It introduces five reasoning levels, with max costing $3.30 for a complex SVG generation task.
Claude Fable 5.1 was released on September 1, 2026, with a significant boost in Terminal-Bench-Science score to 52.6%, making it the top performer in its class. This update is crucial for developers working on complex AI projects requiring detailed reasoning and output. The new version offers five reasoning levels, from low to max, each with distinct performance and cost characteristics. The max level, for instance, generates a detailed SVG of a pelican riding a bicycle, using 65,927 output tokens and costing $3.30. Developers should pay attention to the cost implications and performance trade-offs when choosing the right reasoning level for their projects.
Key Points
Claude Fable 5.1 released on September 1, 2026.
Terminal-Bench-Science score improved to 52.6%, up from 24.7% for Fable 5.
Five reasoning levels: low, medium, high, xhigh, and max, each with unique performance.
Max reasoning level for SVG generation used 65,927 tokens and took 13 minutes and 54 seconds.
Cost for max reasoning level: $3.30 for a detailed SVG of a pelican riding a bicycle.
Why It Matters
If you're working on complex AI projects requiring detailed reasoning and output, Claude Fable 5.1's new reasoning levels offer significant performance improvements. However, the cost can escalate quickly, with the max level costing $3.30 for a detailed SVG generation task. This update impacts developers choosing the right reasoning level for their projects, balancing performance and cost.
Frequently Asked Questions
Why does this matter?
If you're working on complex AI projects requiring detailed reasoning and output, Claude Fable 5.1's new reasoning levels offer significant performance improvements. However, the cost can escalate quickly, with the max level costing $3.30 for a detailed SVG generation task. This update impacts developers choosing the right reasoning level for their projects, balancing performance and cost.
What happened?
Claude Fable 5.1, released on Sept 1, boasts a 52.6% Terminal-Bench-Science score, up from 24.7% for Fable 5. It introduces five reasoning levels, with max costing $3.30 for a complex SVG generation task.
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