Claude Haiku 4.5
Fast / cheapAnthropic’s fastest and most cost-effective model; 200K-token context window.
- Input / 1M
- $1.00
- Output / 1M
- $5.00
- Context
- 200K tokens
- Provider
- Anthropic
Pricing verified June 4, 2026. Prices change frequently. Always confirm against the provider’s official pricing page before relying on these figures for budgeting. Official pricing →
What Claude Haiku 4.5 is best for
High-volume, latency-sensitive routes: classification, extraction, routing, and cheap first-pass work.
Use it for high-volume, latency-sensitive, low-stakes work: classification, extraction, routing, first-pass drafts. Avoid it for tasks where a wrong answer is expensive — keep those on a stronger model.
Claude Haiku 4.5 cost by volume
Estimated monthly cost at three realistic volumes, at $1.00 input / $5.00 output per million tokens.
| Scenario | Input / mo | Output / mo | Est. cost / mo |
|---|---|---|---|
| Prototype | 2M | 0.5M | $5 |
| Growing product | 50M | 10M | $100 |
| At scale | 500M | 100M | $1,000 |
Plug in your own numbers with the cost calculator.
How to cut your Claude Haiku 4.5 bill
The headline price isn’t the lever — your usage pattern is. The biggest reductions come from how you route and structure requests, not from switching models alone:
- Route low-stakes calls to a cheaper tier and keep Claude Haiku 4.5 on the routes where its strengths matter.
- Cache large stable prompt prefixes so repeated context bills at a fraction of the price.
- Batch non-urgent work, and trim oversized context by retrieving instead of stuffing.
- Add fallback chains so a timeout doesn’t trigger an expensive retry.
Do it behind evals so quality holds — that combination is how teams cut 30–60% without regressions.
Context window: 200K tokens
Claude Haiku 4.5’s context window bounds how much it can consider at once — system prompt, history, retrieved docs, and the response all draw from those 200K tokens, with up to 64K reserved for output. A larger window enables whole-codebase reasoning and long documents, but using more of it costs more per request — so retrieval and caching still matter even when the window is large.
Cheaper alternatives to Claude Haiku 4.5
By blended cost (3:1 input:output). The right swap depends on whether quality holds on your routes — always validate with evals.
Frequently asked questions
How much does Claude Haiku 4.5 cost?
Claude Haiku 4.5 costs $1.00 per million input tokens and $5.00 per million output tokens. A workload of 50M input and 10M output tokens per month would cost about $100.
What is Claude Haiku 4.5's context window?
Claude Haiku 4.5 has a 200K-token context window, with up to 64K output tokens. Anthropic’s fastest and most cost-effective model; 200K-token context window.
Is Claude Haiku 4.5 the right model for my workload?
High-volume, latency-sensitive routes: classification, extraction, routing, and cheap first-pass work. The cheapest correct model is workload-specific — route low-stakes calls to a cheaper tier and reserve Claude Haiku 4.5 for work where its strengths matter, validated by evals.