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Claude 3.7 Sonnet

Anthropic, 24 Feb 2025.

Lab
Anthropic
Released
24 Feb 2025
Kind
Language, Language modeling/generation
Training compute
3.4 × 10²⁵ FLOP
Parameters
Not disclosed
Capability index
141.2 (Epoch)
Task length at 50% success
1.0 h (METR)
Organisations
Anthropic
Country
United States
Waypoint
Crossed ONEHR

Data: Epoch AI (Creative Commons Attribution), releases too new for it from OpenRouter, and METR. Updated 25 Sep 2026.