Wrong! Look at it better. It shows that Opus has superior performance but at higher cost.
Why are you comparing xhigh reasoning between Sonnet and Opus? Of course Sonnet xhigh is cheaper than Opus xhigh, but that isn't the point; the point is that at e.g. 80% accuracy on Opus costs ~$0.45 (medium reasoning) whereas on Sonnet it costs ~$0.52 (xhigh/max reasoning).
Re:Claude Sonnet 5
by doctoboggan on Tuesday June 30, 2026 @04:05PM
(#48738495)
No, you are misunderstanding the graph. Draw a vertical line anywhere, that is a "constant cost" line. For any given cost, Opus 4.8 has a higher performance than Sonnet 5. Only where Sonnet 5 effort is at medium or low would it make any sense to use it, as there isn't even an equivalent Opus effort level to compare to.
Alternatively you can draw a horizontal "constant performance" line and see that Opus is cheaper for a given performance level.
Re:Claude Sonnet 5
by brokencode on Tuesday June 30, 2026 @04:06PM
(#48738507)
That is a bad comparison. Compare Sonnet xhigh against Opus medium, which is both better and cheaper.
The graph shows that Opus is cheaper than Sonnet for the same performance. Unless I am suffering a cognitive blindness thing right now.