Comparing 2 models

Claude Opus 5.5 vs DeepSeek V4 Flash 0423

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

metric
Model 1Claude Opus 5.5
Model 2DeepSeek V4 Flash 0423
Best for
Code Completion (#1)
Best Cheap LLM for High Volume (#2)
Provider
anthropic
deepseek
Context
1M
1.0MBest
Input / 1M
$4
$0.089Best
Output / 1M
$20
$0.18Best
Tool use
yesBest
yesBest
Vision
yesBest
—
Reasoning
yesBest
yesBest
Open-weight
—
yesBest
Released
Sep 18, 2026
Apr 23, 2026