Claude Opus 4.8
Claude Opus 4.8 (Adaptive Reasoning, Max Effort) is an AI model from Anthropic.
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Context
1M
Input
$5
/1M tok
Output
$25
/1M tok
Blended
$10
#444/ 461/1M · 3:1
Speed
0
#115/ 461tok/s
Cache read
$0.50
0.10x input
Cache write
$6.25
1.25x input
Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter
Reported on 42 evals across 23 domains - best 94.4% on τ²-bench (Tau²-bench) · #16 of 321
Reported eval scores
42IFBench62.2
LiveBench - Math84.3
LiveBench80.1
Vals Index60.9
SAGE54.8
SciCode53.5
MortgageTax69.9
TaxEval v275.6
CorpFin v266.7