Plain-English Summary
Anthropic’s fast, lower-cost Claude model for responsive assistants and high-volume processing.
Claude Haiku 4.5
Anthropic’s fast, lower-cost Claude model for responsive assistants and high-volume processing.
Claude 4
General LLM
GA
Open weights: No
API: Yes
Technical Notes
Multimodal text-and-image model with 200K context, 64K output, tool use, and optional extended thinking.
Best For
Customer support, extraction, summarization, fast agents
Watch Out For
Smaller context and lower reasoning ceiling than Sonnet or Opus.
Model Specs
- Maker
- Anthropic
- Country
- USA
- Family
- Claude 4
- Type
- General LLM
- Release date
- 2025-10-01
- Date confidence
- Model ID date
- Status
- GA
- Context window
- 200,000 tokens
- Max output
- 64,000
- Parameters
- Not disclosed
- Active parameters
- Not disclosed
- Architecture
- Proprietary multimodal transformer
- Reasoning
- Yes — extended thinking
- Tool calling
- Yes
- Structured output
- Yes
- API available
- Yes
- Open weights
- No
- Self-hostable
- No
- License
- Proprietary
- Inputs
- Text, image
- Outputs
- Text
- Approx. price
- $1 input / $5 output per 1M tokens
- How to access
- Provider website or API
- Model / API ID
- claude-haiku-4-5-20251001
- Knowledge cutoff
- 2025-02
- Fine-tuning
- Prompting / RAG
- Completeness
- 90 %
- Verified
- Jul 18, 2026
- Snapshot date
- Jul 18, 2026
- Source
- Official source