21/ Opus 5.5 (high)
A big step forward compared to Opus 5! aug5thmusic love to hear your verdict :-)
Did my first test with Opus 5.5 and overall I’m pretty satisfied with the result, especially since I didn’t even specify much detail in the prompt.
Great work. That said, even with the increased 5-hour limits, it burns through usage way too fast.
If there is even one fabrication
If there is even one fabrication, the test will fail, and Opus 5.5 passed in 16 out of 18 performance reports written with different effort, while none of Fable 5.1 and Opus 5 passed. Anthropic didn't explain why it failed an internal test. According to our calculations, it will run about 40% cheaper than Opus 5, and Pro, Max, and Team will have an additional 5-hour time slot.
Entropic unveiled the Claude Opus 5.5 model; Performance on par with Fable 5.1 but cheaper
The new Claude Opus 5.5 model is the first member of the Claude 5.5 family. This model has the same level of performance as Claude Fable 5.1 in many tasks, but its implementation cost is about 40% lower than Opus 5. Opus 5.5
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