Home / Anthropic / Claude Sonnet 5.5 (Max, Default Fallback)

Claude Sonnet 5.5 (Max, Default Fallback)NEW+4 tiers

Claude Sonnet 5.5 (Max, Default Fallback) is developed by Anthropic, released 2026-09-28.

Reasoning-effort tiers merged. This page shows the highest-intelligence tier. It merges 5 tiers of the same model: Claude Sonnet 5.5 (Max, Default Fallback), Claude Sonnet 5.5 (Xhigh, Default Fallback), Claude Sonnet 5.5 (High, Default Fallback), Claude Sonnet 5.5 (Medium, Default Fallback), Claude Sonnet 5.5 (Low, Default Fallback).
Input price
$2.00 / 1M tok
Output price
$10.00 / 1M tok
Blended price
$4.00 / 1M tok
Intelligence
56.0
100th percentile of 554 models with an Intelligence score — highest tracked
Coding
—
Math
—
Speed
138 tok/s
Time to first token
307.45s

Third-party resale listings

Captured 2026-10-20 from the reseller marketplace subrouter.ai's public pricing list. These are third-party resale prices, not Anthropic's official price. Many resellers use shared/subscription access or reverse-engineered integrations — availability and quality are not verified by this site. Prices are USD per 1M tokens. Reseller names are the marketplace's own listing IDs, not company names — none of them is Anthropic or any other model developer.

11 resellers passed our sanity checks against Anthropic's official price; cheapest trusted price $0.7059/1M blended.

Reseller (marketplace ID)Input $/1MOutput $/1MBlended $/1Mvs. official
xcgx 0.0574 0.2868 0.1147 3% Likely subscription-resale / reverse-engineered
apiun 0.0588 0.2941 0.1176 3% Likely subscription-resale / reverse-engineered
viapi-plus 0.0647 0.3235 0.1294 3% Likely subscription-resale / reverse-engineered
a6aa 0.0735 0.3676 0.147 4% Likely subscription-resale / reverse-engineered
quqiai 0.0735 0.3676 0.1471 4% Likely subscription-resale / reverse-engineered
RelAI 0.0735 0.3676 0.1471 4% Likely subscription-resale / reverse-engineered
FoxRouter 0.084 0.4202 0.1681 4% Likely subscription-resale / reverse-engineered
LingAI 0.0853 0.4265 0.1706 4% Likely subscription-resale / reverse-engineered
o2oai 0.1162 0.5809 0.2324 6%
TokenX 0.1176 0.5882 0.2353 6%
mixmix123 0.3529 1.7647 0.7059 18%

Resale listings: subrouter.ai public marketplace snapshot 2026-10-20.

Official pricing from Anthropic. See the third-party resale listings above for reseller prices — those are not official and not verified by this site.

See all of Anthropic's models on its provider page, or browse the full model directory.