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Claude Sonnet 5.5
🇺🇸Anthropic4d
Context:1.0M tokens
Input:$2/1M
Output:$10/1M
Neura Index
99.0
Rank #3—
lowCategory Profile
Benchmark Scores (1)
coding
| Benchmark | Score | Source |
|---|---|---|
| SWE-Bench Pro | 81.3 | verified |
Performance History
Similar Models
Frequently Asked Questions about Claude Sonnet 5.5
What is Claude Sonnet 5.5's Neura Intelligence Index score?▾
Claude Sonnet 5.5 by Anthropic scores 99.0 out of 100 on the Neura Intelligence Index, ranking #3 among tracked AI models. This composite score is computed from 1 individual benchmarks across coding, math, reasoning, and language categories.
How much does Claude Sonnet 5.5 cost to use?▾
Claude Sonnet 5.5 costs $2/1M input tokens and $10/1M output tokens via API. At a typical 3:1 input-to-output ratio with 1M tokens/day usage, the estimated monthly cost is approximately $120.
Is Claude Sonnet 5.5 open source?▾
No, Claude Sonnet 5.5 is a proprietary model by Anthropic. It is only accessible via their API.
What is Claude Sonnet 5.5's context window?▾
Claude Sonnet 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 Sonnet 5.5 perform best on?▾
Claude Sonnet 5.5 achieves its highest score on SWE-Bench Pro with a score of 81.3%. This benchmark evaluates harder subset of swe-bench with more complex multi-file changes.