Home / Anthropic / Claude Opus 4.5

Claude Opus 4.5

Claude Opus 4.5 is developed by Anthropic, released 2025-11-24.

Model ID: claude-opus-4-5-20251101

Single public source; verify on the official site
Input price
$5.00 / 1M tok
Output price
$25.00 / 1M tok
Blended price
$10.00 / 1M tok
Epoch Capabilities Index (ECI)
No public data yet
Epoch Mock AIME accuracy
48.1%
Epoch AI · as of 2025-11-24
Epoch FrontierMath (T1–3) accuracy
No public data yet
Arena text rating
1469.8
82nd percentile of 164 models with an Arena text rating score
LMArena · as of 2026-11-06
Arena coding rating (human preference votes, not task accuracy)
1522.8
LMArena · as of 2026-11-06
Arena math rating
1462.2
LMArena · as of 2026-11-06
Arena WebDev rating
1468.9
LMArena · as of 2026-11-06

Third-party resale listings

Captured 2026-11-06 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.

3 resellers passed our sanity checks against Anthropic's official price; cheapest trusted price $7.0588/1M blended.

Reseller (marketplace ID)Input $/1MOutput $/1MBlended $/1Mvs. official
sh00t.host 0.05 0.25 0.10 1% Likely subscription-resale / reverse-engineered
xcgx 0.0735 0.3676 0.1471 1% Likely subscription-resale / reverse-engineered
H2 3.5294 17.6471 7.0588 71%

Resale listings: subrouter.ai public marketplace snapshot 2026-11-06.

Official list price from Anthropic, as recorded by models.dev. 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. Full source licenses and sync dates: /data-sources/.