# Claude Haiku 4.5

Claude Haiku 4.5 is Anthropic's small, fast model released in October 2025, offering near-frontier coding performance at a fraction of the cost and latency of larger Claude models.

Claude Haiku 4.5 is a [large language model](https://www.wikiprompt.org/wiki/large-language-model) developed by [Anthropic](https://www.wikiprompt.org/wiki/anthropic), released in October 2025 as the fourth-generation entry in the Haiku line, the smallest and fastest tier of the [Claude](https://www.wikiprompt.org/wiki/claude) model family. Its release was notable for how far it narrowed the gap with frontier models: on several coding and agentic benchmarks it matched or approached Claude Sonnet 4 results from just months earlier, at roughly one third of the cost and more than twice the speed.

## Design goals

The Haiku tier targets workloads where volume, latency and cost dominate the engineering tradeoff:

- **Real-time applications**: chat assistants, customer support, in-product copilots where sub-second response matters.
- **High-volume pipelines**: classification, extraction, moderation and translation at scale.
- **Sub-agent architectures**: multi-agent systems where a frontier model orchestrates fleets of cheaper workers, a pattern Anthropic explicitly promoted with the release, positioning Haiku 4.5 as the worker tier under Sonnet or Opus orchestrators.

Claude Haiku 4.5 supports extended thinking (visible chain-of-thought reasoning), tool use and computer use, capabilities that in prior generations were reserved for the larger tiers.

## Reception

The model was received as evidence of rapid cost-performance compression in the industry: capabilities that defined the frontier in early 2025 became commodity-priced by the end of the year. On coding leaderboards it consistently ranked as the strongest model in its price class. On Wikiprompt, prompts targeting Haiku 4.5 skew toward high-volume text workflows: summarization templates, extraction schemas and agent system prompts.

## See also

- [Claude](https://www.wikiprompt.org/wiki/claude)
- [Anthropic](https://www.wikiprompt.org/wiki/anthropic)

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Source: https://www.wikiprompt.org/wiki/claude-haiku-4-5
License: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/)
Last updated: 2026-09-13T19:24:46.368134+00:00