Will's Blog: Sonnet 4 is available to free and paid users, while Opus 4 is limited to paid users; Opus 4 API costs $15/$75 per 1M input/output tokens, Sonnet 4 costs $3/$15 (Kyle Wiggers/TechCrunch)

22 May 2025

Sonnet 4 is available to free and paid users, while Opus 4 is limited to paid users; Opus 4 API costs $15/$75 per 1M input/output tokens, Sonnet 4 costs $3/$15 (Kyle Wiggers/TechCrunch)

Kyle Wiggers / TechCrunch:
Sonnet 4 is available to free and paid users, while Opus 4 is limited to paid users; Opus 4 API costs $15/$75 per 1M input/output tokens, Sonnet 4 costs $3/$15 — During its inaugural developer conference Thursday, Anthropic launched two new AI models that the startup claims are among the industry's best …

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