Claude Opus 5.5 API price

Anthropic lists Claude Opus 5.5 at USD 4.00 per 1M input tokens and USD 20.00 per 1M output tokens on its own price page (https://platform.claude.com/docs/en/about-claude/pricing), verified 2026-10-28 01:52 UTC. 2 cloud and host listings and 42 community cross-checks of the same model are below; differences are shown, not resolved.

List prices, not transacted prices. What that means.

Anthropic input price, last 90 days

By seller

• Anthropic USD 4.00
• deepinfra USD 4.00
• aws-bedrock USD 4.40

One line per seller, from that listing's own recorded changes; a price holds until the next change.

Anthropic's own price (first-party)

Clouds and hosts (their own first-party price pages)

The same model resold by a cloud or host, at that seller's list price.

Community cross-checks

Sources can disagree. The provider's own listing is first-party; LiteLLM, OpenRouter and models.dev are community cross-checks. Differences are shown, not resolved.

How this page is built

It reads Anthropic's own listing (llm/official/anthropic/claude-opus-5-5) and every other SKU whose model name normalises to the same key. Data: JSON · history CSV.

InfraRabbit (2026). Claude Opus 5.5 API price [data as of 2026-10-28]. https://infrarabbit.com/prices/llm/claude-opus-5-5-price (accessed 2026-10-28). List prices, not transacted prices. CC BY 4.0.

@misc{infrarabbit_llm_claude_opus_5_5_price_2026,
  author       = {InfraRabbit},
  title        = {Claude Opus 5.5 API price},
  year         = {2026},
  howpublished = {\url{https://infrarabbit.com/prices/llm/claude-opus-5-5-price}},
  note         = {Data as of 2026-10-28; accessed 2026-10-28; list prices, not transacted prices; CC BY 4.0}
}