Claude Opus 4.5
by Anthropic
63
Quality Index
$6.00
Per M tokens
1M
Context window
89%
LiveCodeBench
Why We Picked It
Claude Opus 4.5 isn't just the best at benchmarks—it feels different to use. There's a thoughtfulness to its responses that other models lack. It doesn't just answer; it considers. When you're working on complex problems, that difference compounds.
The 1 million token context window means you can feed it entire codebases, full documentation sets, or months of conversation history. And unlike some models that degrade with context, Claude maintains quality throughout.
The Vibes
- ✅ Writing quality: Best-in-class prose. Natural, not robotic.
- ✅ Code reviews: Catches subtle bugs other models miss
- ✅ Long-form reasoning: Can sustain complex arguments across thousands of words
- ✅ Honesty: Admits uncertainty rather than hallucinating
- ⚠️ Speed: Not the fastest. You're trading speed for quality.
- ⚠️ Price: Premium pricing ($6/M) makes it expensive for high-volume use
Best For
Complex reasoning tasks, professional writing, code architecture decisions, research assistance, and anything where quality matters more than cost or speed.