Claude Fast & cheap Verified 19 Aug 2026

Claude Haiku 4.5

Fast and cheap — for high-volume, well-defined tasks.

The one model here still on a 200K window and a Feb 2025 knowledge cutoff. Fine for classification; check dates before asking it about anything recent.

Maker: Anthropic
Context: 200K tokens
Pricing: $1 / 1M tokens / $5 / 1M tokens

Best for

Classifying, tagging, or extracting at volume
Quick reformatting and lightweight rewrites
Anything you'd run hundreds of times where cost compounds

Prompting quirks

Be concrete; don't ask it to reason its way to a judgement

Give Haiku a crisp rubric and clear examples. It's excellent at following instructions, weaker at open-ended judgement.

One job per prompt

Split a complex task into narrow steps rather than one sprawling instruction. Haiku is reliable when the target is unambiguous.

Copy-paste example

Tuned for Claude Haiku 4.5. Swap in your own content where marked.

Tag feedback by theme

Classify each feedback line into exactly one theme:
[onboarding, pricing, performance, bug, feature-request, other].
Output as "line | theme". No explanations.
<feedback>
{paste feedback lines}
</feedback>

Facts verified against the official Anthropic docs on 19 August 2026.