The numbers from Anthropic seem heavily cherry-picked, Artificial Analysis has Opus 5 at 1.25x the cost of Sonnet and 2x the cost of GPT 5.6 and K3.

https://artificialanalysis.ai/?cost=cost-per-task

I can't believe they released the charts they did.

It basically shows that Sol absolutely demolishes Fable at every part of the cost curve for coding for the same level of quality.

Opus is competitive. It just has a higher level of quality / higher cost to start.

I can't help but read these comments in the voice of a TV commercial....

Also the cost per task.

https://www.vals.ai/benchmarks/vals_index

!!! Vals !!!

Vals Index Opus 4.8 > 5.0 goes from $2.90 to $8.54, for 4% gain ... That is a massive cost increase. Sure, 20% cheaper then Fable, but that is a 3x price increase compared to Opus 4.8 in that test.

https://artificialanalysis.ai/models/claude-opus-5 https://artificialanalysis.ai/models/claude-opus-5#price-cos...

!!! artificial analysis !!

Cost per task is second highest, right below Fable.

* Fable: $2.75

* Opus 5.0: $2.03

* Opus 4.8: $1.80

* GPT 5.6 Sol: $1.04

* Kimi K3: $0.95

Looks like interest levels of cherry picked cost in their report. Cheaper model, clearly NOT. More expensive in both benchmarks.

Opus 4.8 was already shown to be cheaper than Sonnet 5 when Sonnet 5 was released (by Anthropic)

It's definitely not cheaper than Sonnet on my benchmark, but it's cheaper than Fable and outperforms it. Which is big IMO. https://revise.io/errata-bench