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Claude Opus 5.5
🇺🇸Anthropic1w
Context:1.0M tokens
Input:$4/1M
Output:$20/1M
Neura Index
99.9
Rank #1—
lowCategory Profile
Benchmark Scores (1)
coding
| Benchmark | Score | Source |
|---|---|---|
| SWE-Bench Pro | 89.9 | verified |
Performance History
Similar Models
Frequently Asked Questions about Claude Opus 5.5
What is Claude Opus 5.5's Neura Intelligence Index score?▾
Claude Opus 5.5 by Anthropic scores 99.9 out of 100 on the Neura Intelligence Index, ranking #1 among tracked AI models. This composite score is computed from 1 individual benchmarks across coding, math, reasoning, and language categories.
How much does Claude Opus 5.5 cost to use?▾
Claude Opus 5.5 costs $4/1M input tokens and $20/1M output tokens via API. At a typical 3:1 input-to-output ratio with 1M tokens/day usage, the estimated monthly cost is approximately $240.
Is Claude Opus 5.5 open source?▾
No, Claude Opus 5.5 is a proprietary model by Anthropic. It is only accessible via their API.
What is Claude Opus 5.5's context window?▾
Claude Opus 5.5 supports a context window of 1.0 million tokens, allowing it to process very long documents, codebases, and conversations in a single request.
What benchmark does Claude Opus 5.5 perform best on?▾
Claude Opus 5.5 achieves its highest score on SWE-Bench Pro with a score of 89.9%. This benchmark evaluates harder subset of swe-bench with more complex multi-file changes.