Claude Opus 4.8
Anthropic · released 2026 · proprietary API
Most capable Opus-tier model for complex reasoning + 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 the 16 models tracked, Claude Opus 4.8 is #14 cheapest to run (blended $/1M at a 3:1 input:output mix), #14 (tied) by input price, and #2 (tied) by context window.
See the full Frontier Index →Compare with
The nearest models by blended cost to run.
Put it to work
Specs from BitByteCore's hand-verified Frontier Ledger (v2026-07-04, verified 21 Jun 2026). Model pricing moves fast — confirm with Anthropic before you rely on a figure.