Models · Claude
Claude Sonnet 5
Asked for a few hundred random integers, Claude Sonnet 5 does not pick evenly. This page is the shape of that preference, built from 36 recorded answers containing 10688 numbers, and it is what the identify tool compares a pasted reply against.
- Bank id
claude-sonnet-5- Family
- Claude
- Collected through
- API
- Collected on
- Not recorded upstream
- Status
- Inherited from ModelTrace; serving identity not independently verified
- Distinct values used
- 355 of 355
- Prompt environments
- 12 of 12
Capability and price
- Sold by
- Anthropic
- Intelligence index
- 38 · v4.3.2, scored as adaptive reasoning, max effort
- Index rank
- Not ranked — the index marks this configuration superseded by Claude Sonnet 5.5.
- Input, per 1M tokens
- 2.00
- Output, per 1M tokens
- 10.00
- Blended, per 1M tokens
- 4.00
- Price rank
- Not ranked
- Context window
- 1,000,000 tokens
Read on 2026-10-02, not measured here: index page · price page
Distribution
Selected number 199
| Model | Times chosen | Share |
|---|---|---|
| Claude Sonnet 5 | 119 | 1.11% |
Favourite numbers
| Number | Times chosen | Share |
|---|---|---|
| 199 | 119 | 1.11% |
| 178 | 102 | 0.95% |
| 63 | 88 | 0.82% |
| 88 | 83 | 0.78% |
| 289 | 83 | 0.78% |
| 45 | 81 | 0.76% |
| 8 | 79 | 0.74% |
| 296 | 77 | 0.72% |
| 55 | 74 | 0.69% |
| 305 | 73 | 0.68% |
| 33 | 70 | 0.65% |
| 320 | 70 | 0.65% |
How reliably it is recognised
In held-out testing across all twelve prompt environments, 10 of 12 three-answer runs named this model with a clear margin, 1 were close calls inside its family, 1 had only a weak match, and 0 named a different model with a clear margin.
With this model removed from the bank and its own answers scored against the rest, 1 of 12 runs still named another model with a clear margin, 8 were close calls inside the family, and 3 had only a weak match. Its answers landed most often on Claude Opus 4.8 (10 of 12). That is the number to keep in mind if you are testing a version that is not listed here.
Both measurements count the status the site attaches to the first-ranked model, not the bare ranking alone. The methodology page explains how they were made and what they leave out.