Fable 5 vs Fable 5.1 across 22,022 of my own API calls: same per call, 31% more tokens per prompt, 31% cheaper per prompt
This story is from 2026-09-02. It is preserved in the archive; the latest stories are on the live feed.
I felt like I've started reaching my weekly capacity much faster, and couldn't cleanly tell why. Until I measured per-prompt instead of per-api-call token costs, which on my corpus appeared to be ~31% higher per prompt than with Fable 5. https://preview.redd.it/b8mf9wfup6nh1.png?width=3000&format=p…
Read the full story at r/ClaudeAI ↗
Timeline · 1 report
- 2026-09-02 22:40 · r/ClaudeAI
Fable 5 vs Fable 5.1 across 22,022 of my own API calls: same per call, 31% more tokens per prompt, 31% cheaper per prompt
More stories
- Anthropic says Claude 'leads' 26 percent of its AI R&D work — Engadget
- Novo Nordisk Will Use Anthropic’s Claude for Drug Research — Wall Street Journal Technology
- Introducing Kimi K3 on Amazon Bedrock — AWS Machine Learning Blog
- Optimizing agent system prompts with Amazon Bedrock AgentCore — AWS Machine Learning Blog
- Introducing Amazon SageMaker HyperPod Inference Gateway — AWS Machine Learning Blog
- Introducing Astra for Law — OpenAI News
- Gemini Hacked Three Companies in First Known Breakout by Google’s AI — Wall Street Journal Technology
- OpenAI reveals cases of ‘concerning’ AI behaviour as it announces new disclosure system — The Guardian AI
Get the daily brief of stories like this at 6:30 every morning →