Claude 3.5 Haiku vs Claude 3.5 Sonnet v2
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Claude 3.5 Haiku and Claude 3.5 Sonnet v2.
Claude 3.5 Haiku
Claude 3.5 Haiku is the fast, cost-efficient member of the Claude 3.5 model family from Anthropic, built to deliver strong performance for coding, text processing, and multi-turn conversation at minimal inference cost. With a 200,000-token context window and pricing at $0.80/MTok for input, it is optimized for high-throughput, latency-sensitive production applications such as real-time chat interfaces, code completion tools, and classification systems. While smaller than its Sonnet and Opus siblings, Claude 3.5 Haiku retains Anthropic's strong alignment and safety properties, making it a reliable choice for consumer-facing AI features.
Claude 3.5 Sonnet v2
Claude 3.5 Sonnet v2 is Anthropic's enhanced version of the breakthrough Claude 3.5 Sonnet, delivering significantly improved coding capabilities, longer context handling, and more reliable tool use at the same competitive pricing. It maintains the same 200K-token context window while achieving substantial gains in HumanEval, SWE-bench, and agentic task completion rates. Claude 3.5 Sonnet v2 remains widely used as a fallback model for teams that have standardized on the 3.5 architecture and prefer its consistent, well-characterized behavior for production deployments.
Technical Specifications
| Specification | Claude 3.5 Haiku | Claude 3.5 Sonnet v2 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Context Window | 200,000 tokens | 200,000 tokens |
| Agent Suitability | N/A | 92/100 |
| Time to First Token (TTFT) | N/A | 360 ms |
| Deployment Model | N/A | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2024-11-04 | 2025-02-15 |
API Pricing Comparison
Input Price per Million Tokens
Claude 3.5 Haiku
$0.80
Claude 3.5 Sonnet v2
$3.00
Output Price per Million Tokens
Claude 3.5 Haiku
$4.00
Claude 3.5 Sonnet v2
$15.00
Want to test both models live?
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Claude 3.5 Haiku Quirks & Gotchas
No developer gotchas reported.
Claude 3.5 Sonnet v2 Quirks & Gotchas
- ▸Well-characterized production behavior — ideal for teams needing stability
- ▸Upgrade to Claude 4.6 Sonnet for 1M context and improved agentic performance