{"data":{"id":"1d5b97cf-826f-4d64-bf9b-9ddf6da7180a","title":"What's new in Claude Sonnet 5","summary":"Claude Sonnet 5 is a new AI model released by Anthropic with performance similar to their more advanced Opus 4.8 model but at lower advertised prices. However, the model uses a new tokenizer (a system that breaks text into small units for processing) that produces approximately 30% more tokens for the same input text, effectively increasing costs by 1.27x to 1.42x depending on the language, with minimal impact on Simplified Mandarin text.","solution":"N/A -- no mitigation discussed in source.","labels":["industry"],"sourceUrl":"https://simonwillison.net/2026/Jun/30/claude-sonnet-5/#atom-everything","publishedAt":"2026-06-30T21:23:02.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"news","affectedPackages":null,"affectedVendors":["Anthropic"],"affectedVendorsRaw":["Claude Sonnet 5","Anthropic"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"patchAvailable":null,"disclosureDate":"2026-06-30T21:23:02.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"trivial","impactType":null,"aiComponentTargeted":"model","llmSpecific":true,"classifierConfidence":0.95,"researchCategory":null,"atlasIds":null}}