Claude Haiku 4.5
Fastest/cheapest current Claude. Snapshot claude-haiku-4-5-20251001 (alias claude-haiku-4-5). Uses extended thinking (thinking type enabled + budget_tokens), no effort parameter. Training data cutoff Jul 2025. Retirement not sooner than 2026-10-15. Batch $0.50/$2.50.
- Context window
- 200,000 tokens
- Max output
- 64,000 tokens
- Knowledge cutoff
- 2025-02
- Input
- text, image, pdf
- Output
- text
- License
- proprietary
- Pricing
- input: $1 · output: $5 · cache read: $0.1 (per 1M tokens (USD); Batch API 50% off) source
- Verified
- 2026-09-29
How to call it
| Provider | Model id | Endpoint / URL | Docs |
|---|---|---|---|
| Anthropic API (Claude API) | claude-haiku-4-5-20251001 | https://api.anthropic.com/v1/messages | docs |
| AWS Bedrock (Messages API / Mantle) | anthropic.claude-haiku-4-5 | — | docs |
| AWS Bedrock (InvokeModel) | anthropic.claude-haiku-4-5-20251001-v1:0 | — | docs |
| Google Cloud Vertex AI | claude-haiku-4-5@20251001 | — | docs |
| Microsoft Foundry (Azure) | claude-haiku-4-5 | — | docs |
| Claude Platform on AWS | claude-haiku-4-5 | — | docs |
| OpenRouter | anthropic/claude-haiku-4.5 | openrouter.ai/anthropic/claude-haiku-4.5 | — |
| Web app | — | claude.ai | — |
Notable capabilities (3)
- Sonnet-4-class coding at Haiku price: 73.3% on SWE-bench Verified, roughly matching Sonnet 4 at one-third the cost and over 2x the speed. source
- Sub-agent workhorse: Reaches about 90% of Sonnet 4.5 on Augment's agentic eval; Anthropic positions it for multi-agent orchestration. source
- FIRST Haiku with extended thinking and computer use: First Haiku model with extended thinking; it also surpasses Sonnet 4 on some computer-use tasks. source
Cheap, low-latency model for classification, extraction, sub-agents and high-volume chat.
curl https://api.anthropic.com/v1/messages \
-H "x-api-key: $ANTHROPIC_API_KEY" -H "anthropic-version: 2023-06-01" -H "content-type: application/json" \
-d '{"model":"claude-haiku-4-5","max_tokens":16000,"messages":[{"role":"user","content":"Hello"}]}'
Sources:
- Model page: https://platform.claude.com/docs/en/models/haiku-4-5/overview
- Announcement: https://www.anthropic.com/news/claude-haiku-4-5
- Pricing: https://platform.claude.com/docs/en/about-claude/pricing
- Models overview: https://platform.claude.com/docs/en/about-claude/models/overview
- Deprecations: https://platform.claude.com/docs/en/about-claude/model-deprecations
Other Anthropic models
Claude Sonnet 5.5 · Claude Opus 5.5 · Claude Fable 5.1 · Claude Mythos 5.1 · Claude Opus 5 · Claude Sonnet 5 · Claude Fable 5 · Claude Opus 4.8 · Claude Opus 4.7 · Claude Sonnet 4.6 · Claude Opus 4.6 · Claude Opus 4.5 · Claude Sonnet 4.5 · Claude Opus 4.1 · Claude Sonnet 4