Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)NEW+4 tiers
Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) is developed by Anthropic, released 2026-09-22.
Reasoning-effort tiers merged. This page shows the
highest-intelligence tier. It merges 5 tiers of the same model:
Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, Xhigh Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, High Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, Medium Effort, Default Fallback), Claude Opus 5.5 (Adaptive Reasoning, Low Effort, Default Fallback).
Input price
$4.00 / 1M tok
Output price
$20.00 / 1M tok
Blended price
$8.00 / 1M tok
Intelligence
57.6
100th percentile of 536 models with an Intelligence score — highest tracked
Coding
—
Math
—
Speed
—
Time to first token
—
Official pricing from Anthropic.
Multi-gateway price comparison (OpenRouter, Together, etc.) is coming soon — not live yet.
See all of Anthropic's models on its provider page, or browse the full model directory.