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Anthropic
Claude Opus 5.5
Claude Opus 5.5 is a chat model from Anthropic, positioned in the Opus tier of the Claude model family.
Input from
$2.00 / 1M tokens
across 2 providers
API Pricing
Cheapest on OpenRouter — 40% below avg| Provider | Input / 1M | Output / 1M | Cached / 1M |
|---|---|---|---|
| $2.00 | $10.00 | $0.100 | |
| $4.00 | $20.00 | $0.200 | |
| $4.00 | $20.00 | $0.200 |
Prices updated daily. Last check: Sep 23, 2026
Claude Opus 5.5 pricing by provider
Input, output, and batch rates, plus alternatives, for one provider at a time.
Performance & Benchmarks
Source: Artificial Analysis →Intelligence
57.6 / 100
Reasoning & Knowledge
- Humanity's Last Exam61.4%
Coding
- SciCode66.9%
Instruction & Long Context
- Long-Context Reasoning84.7%
Benchmarks measured Sep 2026. Scores are independent evaluations, not vendor-reported.
Model Details
General
- Creator
- Anthropic
- Modalities
- Text
Capabilities
- Tool Calling
- No
- Open Source
- No
Strengths & Limitations
Strengths
- Sits in the Opus tier, Anthropic's largest Claude configuration, which is typically selected for the hardest reasoning and coding tasks
- Part of the Claude family, so prompts, system-prompt conventions, and the Anthropic Messages API format carry over from other Claude models
- Incremental 5.5 release within an established Opus line, making migration from an earlier Opus version a smaller change than switching families
- Available through providers listed in the pricing table on this page, allowing rate and availability comparison
- Suited to workloads where per-request quality outweighs per-token cost, such as code review and long-form analysis
- Tiered family structure lets teams route easy traffic to smaller Claude models and escalate only difficult requests to Opus
Limitations
- Our database has no confirmed context window, modality, or tool-calling data for this model — check Anthropic's documentation before committing
- Throughput and time-to-first-token benchmarks from Artificial Analysis are not yet populated for this entry, so speed cannot be compared numerically here
- Opus-tier models are generally the most expensive option within the Claude family, making them a poor fit for high-volume, low-complexity traffic
- No independent benchmark scores are recorded in our catalog for this release
- Provider availability for newer Claude releases is often narrower than for established models
Key Features
•Chat/conversational completion interface
•Opus-tier position within the Claude model family
•Anthropic Messages API compatibility shared with other Claude models
•Incremental 5.5 revision of the Claude Opus line
•Multi-provider availability tracked in the pricing table on this page
•Suited to long-form generation and multi-step reasoning workloads typical of Opus-tier deployments
•Drop-in prompt compatibility with sibling Claude tiers for tier-routing setups
About Claude Opus 5.5
Claude Opus 5.5 is a large language model developed by Anthropic and listed in our catalog as a chat model. It belongs to the Claude family, where Anthropic has historically used the Opus name for its largest, most compute-intensive tier, sitting above the Sonnet and Haiku tiers that target balanced and low-latency workloads respectively. The 5.5 designation places it as an incremental release within the Opus line rather than a new tier.
Our database records limited verified technical detail for this model. We do not currently track a confirmed context window, modality list, or tool-calling specification for Claude Opus 5.5, and the throughput and time-to-first-token figures sourced from Artificial Analysis are not yet populated. Readers who need exact context limits, input modalities, or rate limits should consult Anthropic's own model documentation or the documentation of whichever provider they plan to use, since serving configurations can differ between the first-party Anthropic API and third-party platforms.
In practice, Opus-tier Claude models are generally selected for work where output quality matters more than per-token cost or latency — multi-step reasoning, long-form drafting, code review and refactoring, and agentic workflows that chain many model calls together. Teams that run high-volume, low-complexity traffic typically route that work to smaller Claude tiers and reserve an Opus model for the subset of requests that need the extra capability. Use the pricing table on this page to see which providers currently serve Claude Opus 5.5 and how their rates compare.
Common Use Cases
Claude Opus 5.5 fits workloads where the difficulty of the task justifies an Opus-tier model: reviewing and refactoring substantial codebases, debugging non-obvious failures, drafting and revising long technical or legal documents, and driving agentic pipelines where an error early in the chain compounds across later steps. It is also a common choice for research and analysis tasks that require holding several competing considerations in mind at once, and for evaluation or judging pipelines where a stronger model grades the output of a smaller one. Teams running customer-facing chat at scale, bulk classification, or simple extraction generally get better economics from the Sonnet or Haiku tiers and reserve Opus for escalated or high-stakes requests. Because our catalog does not record confirmed modality or context-window data for this release, verify those specifics with Anthropic's documentation before designing around image input or very long inputs.
Frequently Asked Questions
How much does Claude Opus 5.5 cost?
Pricing varies by provider and by pricing type — input tokens, output tokens, cached input, and batch processing are typically billed at different rates, and the same model can cost different amounts on different platforms. Check the pricing table on this page for current rates from the providers we track.
What is Claude Opus 5.5 best used for?
It is best suited to tasks where output quality matters more than cost or latency: complex coding and code review, multi-step reasoning, long-form writing and editing, and agentic workflows where mistakes compound. High-volume simple tasks are usually better served by smaller Claude tiers.
How does Claude Opus 5.5 differ from Claude Sonnet and Haiku models?
Anthropic organizes Claude into tiers. Opus is the largest and most capable tier, Sonnet targets a balance of capability and cost, and Haiku targets low latency and high throughput. Many teams route most traffic to Sonnet or Haiku and escalate only difficult requests to an Opus model.
What context window does Claude Opus 5.5 support?
Our database does not currently record a confirmed context window for this model, and context limits can also differ between the Anthropic API and third-party providers. Check Anthropic's model documentation or your provider's docs for the exact limit before designing long-context workloads.
Are there published benchmark scores for Claude Opus 5.5?
Our catalog lists Artificial Analysis as the benchmark source for this entry, but the throughput and time-to-first-token figures are not yet populated, and we do not record independent quality scores for it. Treat any speed or quality comparison as unverified until those numbers are available.