Index
AI Model: Claude Sonnet 4 (anthropic)
Verdictpartial92%
1 check · 4/30/20261 → partial
Our claim
entire record- Entity Type
- ai-model
- Title
- Claude Sonnet 4
- Description
- Claude Sonnet 4 was released May 22, 2025, marking the transition to the Claude 4 generation with a new naming convention. Scored 72.7% on SWE-bench Verified. Priced at \$3/\$15 per million tokens with a 200K token context window (1M beta added later).
- Tags
- claude,claude-4
- Last Updated
- May 2025
- Related Entries
- [object Object],[object Object]
- Metadata
- [object Object]
Source evidence
1 src · 1 checkpartial92%Haiku 4.5 · 4/30/2026
NoteThe source confirms title (Claude Sonnet 4), developer (anthropic), release date (May 22, 2025), and pricing ($3 input / $15 output per million tokens). However, two fields are unverifiable: (1) contextWindow of 200,000 tokens is not mentioned anywhere in the source text; (2) safetyLevel of ASL-2 is contradicted — the source states 'implementing measures for higher AI Safety Levels like ASL-3' for Claude 4 models, suggesting ASL-3 or higher, not ASL-2. The claim of ASL-2 appears to be incorrect based on the source's explicit mention of ASL-3 implementation.
Case № claude-sonnet-4Filed 4/30/2026Confidence 92%