Model pricing
Claude Opus 5.5 pricing
Claude Opus 5.5 by Anthropic costs $4 per 1M input tokens and $20 per 1M output tokens (cached input $0.4, batch input $2) as of 2026-10-04. A 1,000-input/500-output request costs $0.014. The lowest-cost alternative with at least this context window and the same recorded reasoning category is GPT-6 Luna Pro at $0.1/$0.5; capability equivalence is not guaranteed.
Notes
Frontier agentic coding and long-horizon reasoning
Key pricing facts
| Fact | Value |
|---|---|
| Input / 1M tokens | $4 |
| Output / 1M tokens | $20 |
| Cached input / 1M | $0.4 |
| Batch input / output / 1M | $2 / $10 |
| Context window | 1,000,000 |
| Provider | Anthropic |
| Last verified | 2026-10-04 |
| Snapshot updated | 2026-10-04 |
Last updated: · Source: Anthropic pricing · Methodology
Frequently asked questions
What does Claude Opus 5.5 cost per million tokens?
Input costs $4 and output costs $20 per million tokens. The 1,000-input/500-output example costs $0.014, before discounts, taxes, hidden reasoning tokens or context-tier surcharges.
Does Claude Opus 5.5 have cached or batch pricing?
Cached input: $0.4 per million tokens under the existing provider cache rules. Batch: $2 input and $10 output per million tokens. Eligibility and cache-write charges depend on the provider; these discounts are not automatically stacked.
What is a cheaper alternative to Claude Opus 5.5?
GPT-6 Luna Pro costs $0.1 input and $0.5 output per million tokens. This comparison matches context capacity and reasoning category, not benchmark quality. Test your workload before replacing a model.
How often are these prices verified?
The live pricing table synchronizes stored model records daily; public file snapshots update when the site is rebuilt. Synchronization is not independent provider verification. Snapshot updated 2026-10-04. The recorded model verification date is 2026-10-04.