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Opus 5.5
Claude Opus 5.5 becomes Amp's default medium mode model
Amp replaced GPT-5.6 Sol with Claude Opus 5.5 as the default model for its medium mode.
In internal evaluations, Opus 5.5 solved 65% of tasks (up from GPT-5.6 Sol's 61% and Opus 5's 56%) at 10% lower cost than GPT-5.6 Sol and 25% lower than Opus 5.
The model is set to high reasoning effort by default, as higher settings degrade performance and increase cost.
From the source
In our internal evals, Opus 5.5 solved 65% of tasks, up from GPT-5.6 Sol's 61% and Opus 5's 56% . And it did that for 10% less than GPT-5.6 Sol and 25% less than Opus 5.
ampcode.com
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