Claude Haiku 4.5 vs Claude Sonnet 4.6
Direct comparison between anthropic and anthropic for chat models. Specs, prices, strengths, weaknesses — decide on facts.
At a glance
- · Cheaper: Claude Haiku 4.5
- · Claude Haiku 4.5: Very cheap per million tokens — good for bulk workloads
- · Claude Sonnet 4.6: Best-in-class for code refactoring and multi-step pull requests
Spec comparison
| Spec | Claude Haiku 4.5 | Claude Sonnet 4.6 |
|---|---|---|
| Provider | anthropic | anthropic |
| Input per 1M tokens | $1.00 / 1M | $3.00 / 1M |
| Output per 1M tokens | $5.00 / 1M | $15.00 / 1M |
| Context window | 200,000 tok | 200,000 tok |
| Max output | 8,192 tok | 64,000 tok |
| Knowledge cutoff | 2025-07 | 2025-07 |
| Vision | ||
| Tool calling | ||
| Structured output | ||
| Reasoning |
Claude Haiku 4.5 — strengths
- +Very cheap per million tokens — good for bulk workloads
- +Low latency, comparable to Gemini 3 Flash
- +Vision-capable — rare in this price tier
Claude Sonnet 4.6 — strengths
- +Best-in-class for code refactoring and multi-step pull requests
- +Very stable tool-use loops — low hallucination on arguments
- +64k output tokens fit whole files in one response
Claude Haiku 4.5 — weaknesses
- −Weaker on multi-step reasoning than Sonnet
- −Only 8k output tokens — no full files in one response
Claude Sonnet 4.6 — weaknesses
- −Knowledge cutoff July 2025 — no recent web knowledge
- −No native JSON mode — schema enforcement via tool-call trick