How much does Claude Opus 5.5 cost per million tokens?

$4.00 per million input tokens and $20.00 per million output tokens, as listed on OpenRouter on October 21, 2026.

Does Claude Opus 5.5 support prompt caching?

Yes. OpenRouter lists cached input at $0.20 per million tokens, against $4.00 for uncached input.

Is there a cheaper model as good as Claude Opus 5.5?

Claude Sonnet 5.5 scores 56.0 on the Artificial Analysis Intelligence Index, within two points of Claude Opus 5.5 or above it, and costs $10.00 per million output tokens.

Has the price of Claude Opus 5.5 changed?

Not since we started recording it daily on October 15, 2026.

Claude Opus 5.5 API pricing

As of October 21, 2026, Anthropic Claude Opus 5.5 costs $4.00 per million input tokens and $20.00 per million output tokens through OpenRouter, with cached input at $0.20 per million.

Claude Opus 5.5 benchmarks and specs · Every Anthropic model's price

Input, per million tokens$4.00
Output, per million tokens$20.00
Cached input, per million$0.20
Context window1M tokens
Max output128K tokens
Output speed96 tok/s

What a request costs

Three fixed token mixes at the list price, without cache or batch discounts. For a whole month, use the calculator.

Cost of three workloads on Claude Opus 5.5
Workload	Tokens	One request	1,000 requests	Fits the context window
Chat turn	1K input + 500 output tokens	$0.014	$14.00	Yes
Repository review	50K input + 3K output tokens	$0.260	$260.00	Yes
Agent loop	200K input + 10K output tokens	$1.00	$1000.00	Yes
Solved coding task	One SWE-bench Verified attempt, divided by the share that succeed	Not computable	Not computable

Price history

We read this price every day and have since October 15, 2026. It has not changed yet; any change will be listed here with its date.

October 15, 2026 First recorded: $4.00 input, $20.00 output

Cheaper models as good as Claude Opus 5.5

Models within two points of Claude Opus 5.5 or above it on the Artificial Analysis Intelligence Index, with a lower output price. Cheapest first.

Claude Sonnet 5.5$10.00 Overall 56.0 against 57.6 · 50% cheaper output

Claude Opus 5.5 pricing questions

How much does Claude Opus 5.5 cost per million tokens?: $4.00 per million input tokens and $20.00 per million output tokens, as listed on OpenRouter on October 21, 2026.
Does Claude Opus 5.5 support prompt caching?: Yes. OpenRouter lists cached input at $0.20 per million tokens, against $4.00 for uncached input.
Is there a cheaper model as good as Claude Opus 5.5?: Claude Sonnet 5.5 scores 56.0 on the Artificial Analysis Intelligence Index, within two points of Claude Opus 5.5 or above it, and costs $10.00 per million output tokens.
Has the price of Claude Opus 5.5 changed?: Not since we started recording it daily on October 15, 2026.