Comparing 2 models

Claude Sonnet 4.5 vs DeepSeek V4.1 Flash

Facts first, then task-specific rankings. A highlighted cell is better only for that row, not universally.

metric
Model 1Claude Sonnet 4.5
Model 2DeepSeek V4.1 Flash
Best for
Tool & Function Calling (#1)
High-Volume Extraction (#1)
Provider
anthropic
deepseek
Context
1M
1.0MBest
Input / 1M
$3
$0.15Best
Output / 1M
$15
$0.60Best
Tool use
yesBest
yesBest
Vision
yesBest
yesBest
Reasoning
yesBest
yesBest
Open-weight
yesBest
Released
Jan 15, 2025
Sep 10, 2026