Claude Haiku 4.5
Claude Haiku 4.5 is Anthropic's fastest current Claude model with near-frontier intelligence for high-volume and latency-sensitive workloads.
Provider
Anthropic
Model family
Anthropic Claude
Multimodal LLM
Cost tier
Haiku
Status
Current
Why teams choose it
Complex reasoning
Useful for workflows that require structured thinking, multi-step logic, and deeper analysis than lightweight models provide.
Long-context analysis
Helps teams summarize, compare, and extract insights from long documents without losing important nuance.
Coding and tools
Works well for code assistance, tool calling, and agent workflows where instructions must stay consistent across steps.
Cost-efficient routing
Useful as part of a routing stack where cheap models handle drafts and confirmations and this tier handles genuinely hard passages.
Tradeoffs to know
- Use Sonnet 5, Opus 5, or Fable 5 for harder long-horizon tasks.
When not to use this
- Not ideal for sprawling research or brittle multi-hop reasoning unless you constrain scope tightly.
- Avoid for regulated or high-stakes outputs without evaluations that mimic your tooling, data, and review process.
- Promote traffic to heavier tiers inside the family when workflows need richer tools and longer horizons.
Technical specs
- Inputs
- text, image
- Outputs
- text
- Capabilities
- low latency, vision, extended thinking, tool use
- License
- Proprietary API
- Model string
claude-haiku-4-5
Benchmarks
No benchmark data yet.
Anthropic Claude family lineup
Current models
Previous versions
Compare with
Claude Haiku 4.5 FAQ
What is Claude Haiku 4.5?
Claude Haiku 4.5 is Anthropic's fastest current Claude model with near-frontier intelligence for high-volume and latency-sensitive workloads.
When does Claude Haiku 4.5 fit best?
High-volume assistants
What should teams watch out for with Claude Haiku 4.5?
Use Sonnet 5, Opus 5, or Fable 5 for harder long-horizon tasks.
Explore next
Models, tools, and comparisons that connect to this reference.