Claude Opus 4.8
Anthropic · released 2026 · proprietary API
- 1M context
- Text + image in
Legacy Opus model; Anthropic's own model page calls Opus 5.5 the current Opus model and recommends migrating for complex reasoning and long-horizon agentic coding.
Context window
1M
1,000,000 tokens
Input price
$5
per 1M tokens
Output price
$25
per 1M tokens
Blended
$10
3:1 in:out mix
Weights
Proprietary
API only
Released
2026
Anthropic
Where it ranks
Of 40 models tracked.
Cost to run
#34(tied)
of 40
Input price
#34(tied)
of 40
Context window
#9(tied)
of 40
Compare with
The nearest models by blended cost to run.
Put it to work
Specs from BitByteCore's hand-verified Frontier Ledger (v2026-09-26), this row verified 25 Sep 2026 against Anthropic's official pricing ↗. Model pricing moves fast, so confirm with Anthropic before you rely on a figure.