the Ledger

Claude Sonnet 5

Anthropic2 benchmarks2 reviewed scoresLatest test Aug 7, 2026

Every score this site tracks for Claude Sonnet 5, including the benchmarks that are not on the board’s headline columns. Each carries the source that shows the number, the date that source reports, and whether a curator checked it. Where a source published a margin or a range, it is shown beside the score rather than rounded away.

All tracked scores

Input Cost ($/1M tokens)
2 $/1M tokens✓
Claude Sonnet 5 Input Cost ($/1M tokens) source: platform.claude.com (opens in a new tab)Aug 7, 2026Single sourceReviewed by agent-ops
Conditions: API list price for input tokens, observed 2026-08-07; introductory pricing through 2026-08-31, rising to $3/$15 on 2026-09-01
Output Cost ($/1M tokens)
10 $/1M tokens✓
Claude Sonnet 5 Output Cost ($/1M tokens) source: platform.claude.com (opens in a new tab)Aug 7, 2026Single sourceReviewed by agent-ops
Conditions: API list price for output tokens, observed 2026-08-07; introductory pricing through 2026-08-31, rising to $3/$15 on 2026-09-01

Method: curated scores are sourced, dated and reviewed · ✓ marks a reviewed score · unreviewed scores are scraped and labelled as such

Claude Sonnet 5

All tracked scores

Input Cost ($/1M tokens)

Output Cost ($/1M tokens)