Claude Haiku 4.5: token counter & pricing
Anthropic · exact (uses official tokenizer) · pricing as of 2026-04-26.
- Provider
- Anthropic
- API model ID
claude-haiku-4-5-20251001- Context window
- 200,000 tokens
- Input price
- $0.80 per 1M tokens
- Output price
- $4.00 per 1M tokens
- Tokenizer accuracy
- exact (uses official tokenizer)
- Pricing as of
- 2026-04-26
Open the counter to count tokens for Claude Haiku 4.5 in real time.
What is Claude Haiku 4.5?
Claude Haiku 4.5 is Anthropic's fastest and cheapest Claude model — designed for high-volume workloads where you need Claude's quality without paying frontier prices. 17× cheaper than Sonnet on input, 19× cheaper on output.
How tokens are counted here
Haiku uses Anthropic's official /v1/messages/count_tokens endpoint via our serverless proxy. Counts are exact. Same tokenizer as the other Claude models.
When to use Haiku
- Classification and extraction at volume. Tagging support tickets, parsing receipts, structured-output pipelines.
- Short Q&A in chatbots where most messages are 1-2 sentences.
- Real-time UX — Haiku's lower latency matters for interactive applications.
- First-pass routing in agentic systems before escalating to Sonnet/Opus for harder cases.
When not to use Haiku: anything requiring multi-step reasoning, long-form generation, or careful instruction-following on subtle constraints. Use Sonnet there.
Pricing notes
At $0.80/$4 per million, Haiku is in the same league as GPT-4o mini ($0.15/$0.60) and Gemini 2.5 Flash ($0.075/$0.30). Gemini Flash is the cheapest of the three by a wide margin; GPT-4o mini is in the middle; Haiku costs more but tends to win on instruction-following and refusal behavior. Match the model to the task, not just the price.
Common questions
Is Haiku good enough for production?
Yes — for the workloads it's designed for. Run a labeled eval set; if Haiku hits your accuracy bar, ship it. Most teams discover their tasks didn't need Sonnet.
Why does Haiku sometimes refuse benign requests Sonnet handles?
Smaller Claude models can be more conservative on edge cases. If you're hitting refusal walls on a legitimate workload, the fix is usually a clearer system prompt rather than upgrading to Sonnet.
How does Haiku's tokenization compare to other Claude models?
Identical. All Claude models share the same tokenizer, so token counts match across Opus/Sonnet/Haiku for the same input. Only the per-token price differs.
Compare Claude Haiku 4.5 to other models
- Claude Opus 4.7 (Anthropic, $15.00/$75.00)
- Claude Sonnet 4.6 (Anthropic, $3.00/$15.00)
- Qwen 2.5 Coder 32B (Alibaba, $0.80/$0.80)
- Qwen 2.5 72B (Alibaba, $0.90/$0.90)
- Llama 3.1 70B (Meta, $0.59/$0.79)