Comparing 2 models

Claude Sonnet 4.5 vs GPT-6 Astra

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

metric
Model 1Claude Sonnet 4.5
Model 2GPT-6 Astra
Best for
Tool & Function Calling (#1)
High-Volume Extraction (#1)
Provider
anthropic
openai
Context
1M
1.1MBest
Input / 1M
$3Best
$10
Output / 1M
$15Best
$50
Tool use
yesBest
yesBest
Vision
yesBest
yesBest
Reasoning
yesBest
yesBest
Open-weight
Released
Jan 15, 2025
Sep 3, 2026