Pareto curve update adds Sol, Luna and Opus 5.5
An updated price-performance curve chart calls GPT-6 Luna the best at the low end and Opus 5.5 the best value with frontier performance, while noting Fable 5.1 is still preferred internally.
Today the Pareto curve got updated with new Anthropic Opus 5.5 and OpenAI GPT-6 Sol and Luna models. On the cheaper end GPT-6 Luna is the best for its low end price and Opus 5.5 is the best bang for buck with frontier performance. We are still seeing signs of Fable 5.1 being preferred internally and we are aware benchmarks aren’t perfect, but this sets the new bar for models on the curve It’s also worth noting that other types of tasks are still model dependent as well, we prefer GPT-6 Astra for computer use, as an example, and SWE-2 for model pairings for Devin Fusion since it has been trained to be cost effective across the curve