Claude Haiku 4.5
budgetAnthropic•Released on 2025-10-01
Anthropic's fastest model in the Claude 4.5 family. Optimized for quick responses and high-throughput applications. Default fast model in Claude Code. Excellent for simple coding tasks, quick Q&A, and cost-sensitive batch processing.
79
Overall Score
Voice of the community
sample 634“Haiku 4.5 in Claude Code is perfect for quick answers. I use it for simple refactors and questions, switch to Opus for complex work.”
“The speed difference is noticeable. Haiku responds almost instantly while Opus can take several seconds for complex prompts.”
“Don't use Haiku for anything requiring deep reasoning. It's fast but will miss important context in large codebases.”
Core Specs
200K
Context Window
8K
Max Output
ReasoningOpen Sourcetextimage
Scenario Scores
Pros & Cons
Sentiment68% +24% ·8% −
Pros
- +Fastest response in Claude family
- +Affordable pricing ($1/$5 per MTok)
- +200K context window
- +Default fast option in Claude Code
- +Great for high-volume batch processing
Cons
- −Less capable than Sonnet/Opus for complex reasoning
- −Smaller output limit (8K)
- −Not ideal for multi-step agentic tasks
- −May miss nuances in complex instructions
Pricing
Input (per 1M tokens)$1.00
Output (per 1M tokens)$5.00
Subscription$20/month
Free trial available
Updated on 2026-03-09
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2Create an account
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Benchmarks
mmlu86.5%
humanEval90.2%