Key Differences
- •Sonnet 4.5 has a larger context window (1M vs 262k tokens)
- •Sonnet 4.5 has more recent training data (Jan 2025 vs Jan 2024)
- •Kimi K2 Thinking is more affordable for input ($0.60 vs $3.00/1M tokens)
- •Kimi K2 Thinking is more affordable for output ($2.50 vs $15.00/1M tokens)
- •Sonnet 4.5 is newer (released Sep 2025)
262k tokens
Context
1M tokens
Jan 2024
Knowledge
Jan 2025
Sep 2025
Released
Sep 2025
$0.60/1M
Input
$3.00/1M
$2.50/1M
Output
$15.00/1M
Both Kimi K2 Thinking and Sonnet 4.5 are available on Zo Computer. Try them both to see which one works best for your use case.