Neura Intelligence Index
Back to Leaderboard
Claude Sonnet 4.5
🇺🇸Anthropic9mo
Context:200K tokens
Input:$3/1M
Output:$15/1M
Neura Index
79.1
Rank #25—
mediumCategory Profile
Benchmark Scores (6)
reasoning
| Benchmark | Score | Source |
|---|---|---|
| GPQA Diamond | 83.4 | verified |
math
| Benchmark | Score | Source |
|---|---|---|
| AIME 2025 | 87 | verified |
general
| Benchmark | Score | Source |
|---|---|---|
| MMMLU | 89.1 | verified |
Performance History
Similar Models
Frequently Asked Questions about Claude Sonnet 4.5
What is Claude Sonnet 4.5's Neura Intelligence Index score?▾
Claude Sonnet 4.5 by Anthropic scores 79.1 out of 100 on the Neura Intelligence Index, ranking #25 among tracked AI models. This composite score is computed from 6 individual benchmarks across coding, math, reasoning, and language categories.
How much does Claude Sonnet 4.5 cost to use?▾
Claude Sonnet 4.5 costs $3/1M input tokens and $15/1M output tokens via API. At a typical 3:1 input-to-output ratio with 1M tokens/day usage, the estimated monthly cost is approximately $180.
Is Claude Sonnet 4.5 open source?▾
No, Claude Sonnet 4.5 is a proprietary model by Anthropic. It is only accessible via their API.
What is Claude Sonnet 4.5's context window?▾
Claude Sonnet 4.5 supports a context window of 200K tokens, allowing it to process very long documents, codebases, and conversations in a single request.
What benchmark does Claude Sonnet 4.5 perform best on?▾
Claude Sonnet 4.5 achieves its highest score on MMMLU with a score of 89.1%. This benchmark evaluates multilingual massive multitask language understanding across many languages.