the Ledger

Claude Haiku 4.5

Anthropic4 benchmarks2 reviewed scoresLatest test Aug 7, 2026

Every score this site tracks for Claude Haiku 4.5, 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

ARC-AGI-1 (accuracy)
14.33 accuracy
Claude Haiku 4.5 ARC-AGI-1 source: arcprize (opens in a new tab)Apr 14, 2026Single sourceUnreviewed
ARC-AGI-2 (accuracy)
1.25 accuracy
Claude Haiku 4.5 ARC-AGI-2 source: arcprize (opens in a new tab)Apr 14, 2026Single sourceUnreviewed
Input Cost ($/1M tokens)
1 $/1M tokens✓
Claude Haiku 4.5 Input Cost ($/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
Output Cost ($/1M tokens)
5 $/1M tokens✓
Claude Haiku 4.5 Output Cost ($/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

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

Claude Haiku 4.5

All tracked scores

ARC-AGI-1 (accuracy)

ARC-AGI-2 (accuracy)

Input Cost ($/1M tokens)

Output Cost ($/1M tokens)