Claude Opus 5.5

PRICE / USD

$4

Per 1 million output tokens · input billed separately

Input / 1M tokens

$4

Output / 1M tokens

$20

Cached input / 1M tokens

$0.2

Cache write / 1M tokens

$5

Cache write shown for 5-minute TTL; 1-hour writes cost $8/MTok. Fast mode has separate pricing.

SPEED & CAPABILITIES

Not benchmarked

Provider description: Moderate. This does not qualify for the numeric (fast) badge.

Anthropic's relative latency category within the Claude family; no cross-provider measurement.

Model score

58

Our own output-speed measurement

Not measured

Context window

1,000,000

API model ID

claude-opus-5-5

Artificial Analysis tested Claude Opus 5.5 · max, default fallback. This mostly English, text-based index is not a guarantee of performance on your workload. Artificial Analysis · Claude Opus 5.5 · max, default fallback ↗

Uses adaptive thinking. Historical Opus 4.6 results do not evaluate this release.

Suggested starting role: complex planning. Anthropic positions Opus for demanding coding agents and knowledge work. Consider it when a task needs sustained reasoning, several connected steps, or a deeper review. This is editorial guidance, not a benchmark score.