# Claude Haiku 4.5 ![Organization](https://img.shields.io/badge/Org-Anthropic-d97757) ![Context](https://img.shields.io/badge/Context-200K%20tokens-1f6feb) ![Pricing](https://img.shields.io/badge/Price-%241%20%2F%20%245%20per%201M-2da44e) ![License](https://img.shields.io/badge/License-Proprietary-d29922) ![Modality](https://img.shields.io/badge/Modality-Text%20%2B%20Vision-8957e5) ![Released](https://img.shields.io/badge/Released-Oct%202025-555) > **Quick answer:** Claude Haiku 4.5 (released October 15, 2025) is Anthropic's fastest and most cost-efficient model, scoring 73.3% on SWE-bench Verified — one of the world's highest scores — at $1/$5 per million tokens and running 2×+ faster than Sonnet 4.5. It brings Sonnet 4-level coding performance to the Haiku price tier. ## At a Glance **Where Claude Haiku 4.5 leads** - 73.3% SWE-bench Verified at $1/$5 — frontier coding at sub-agent pricing - 2×+ faster than Sonnet 4.5 — the fastest response time in the Claude 4 series - Anthropic's safest model by automated alignment assessment (lower misaligned behavior rate than Sonnet 4.5 and Opus 4.1) - ASL-2 classification — fewer restrictions, simpler deployment for most enterprise use cases **Where it lags** - Extended thinking available but with a smaller thinking budget vs Opus/Sonnet class - Not the top choice for the most complex, open-ended reasoning that requires Opus-level depth **Best for:** high-volume sub-agents, real-time chat, coding assistants, parallel agent swarms, and any workload where cost-per-call and latency are primary constraints. ## What Claude Haiku 4.5 Is Claude Haiku 4.5 was released on October 15, 2025. Anthropic's framing was direct: "What was recently at the frontier is now cheaper and faster." Five months earlier, Claude Sonnet 4 was the state-of-the-art coding model. Haiku 4.5 delivers equivalent coding performance at one-third the cost and more than twice the speed. GitHub Copilot confirmed it matches Sonnet 4 quality in code generation with faster responsiveness. Augment Code's evaluation put it at 90% of Sonnet 4.5's performance — a figure that would have been state-of-the-art just months prior. From a Benchgen perspective, Haiku 4.5 resets the economics of multi-agent systems. A Sonnet-class orchestrator running dozens of parallel Haiku 4.5 sub-agents is now both cheaper and faster than a single Sonnet model doing sequential work. ## Specifications | Field | Value | |---|---| | Organization | Anthropic | | API identifier | `claude-haiku-4-5` | | Context window | 200,000 tokens | | License | Proprietary | | Release date | October 15, 2025 | | Modality | Multimodal (text and vision) | | Safety level | ASL-2 | ## Pricing | | Input (per 1M tokens) | Output (per 1M tokens) | |---|---|---| | Anthropic | $1.00 | $5.00 | Prompt caching up to 90% savings; batch processing 50% savings. Source: [Anthropic pricing](https://claude.com/pricing#api). ## Public Benchmark Scores | Benchmark | Score | Source | Date | |---|---|---|---| | [SWE-bench Verified](/benchmarks/swe-bench-verified) | 73.3% | [Anthropic — Introducing Claude Haiku 4.5](https://www.anthropic.com/news/claude-haiku-4-5) | 2025-10 | | Terminal-bench 2.0 | 40.9% avg | [Anthropic — Introducing Claude Haiku 4.5](https://www.anthropic.com/news/claude-haiku-4-5) | 2025-10 | *Scores reported by Anthropic. Not Benchgen measurements. SWE-bench score averaged over 50 trials with 128K thinking budget.* ## Claude Haiku 4.5 vs Alternatives | Model | SWE-bench Verified | Price (in/out per 1M) | Speed | |---|---|---|---| | **Claude Haiku 4.5** | 73.3% | $1 / $5 | Fastest in Claude 4 | | [Claude Sonnet 4](/models/anthropic/claude-sonnet-4) | 72.7% | $3 / $15 | Moderate | | [Claude Opus 4.6](/models/anthropic/claude-opus-4-6) | 81.42% | $5 / $25 | Standard | | [Claude 3.5 Haiku](/models/anthropic/claude-3-5-haiku) | 40.6% | $1 / $5 | Fast | Haiku 4.5 is now faster and cheaper than Sonnet 4 while matching or exceeding it on SWE-bench. The only reasons to move up to Sonnet 4.6 are tasks requiring longer outputs, deeper reasoning, or the 1M context window. *(Scores from Anthropic announcements; not Benchgen measurements.)* ## Related Models & Benchmarks - Compare: [Claude Sonnet 4.6](/models/anthropic/claude-sonnet-4-6) · [Claude 3.5 Haiku](/models/anthropic/claude-3-5-haiku) · [Claude Opus 4.6](/models/anthropic/claude-opus-4-6) - Benchmarks: [SWE-bench Verified](/benchmarks/swe-bench-verified) ## Frequently Asked Questions

What is Claude Haiku 4.5?

Claude Haiku 4.5 is Anthropic's fastest, most affordable model, released October 15, 2025. It scores 73.3% on SWE-bench Verified — matching the May 2025 flagship Sonnet 4 — at $1/$5 per million tokens.

How much does Claude Haiku 4.5 cost?

$1 per million input tokens and $5 per million output tokens.

--- *Specs sourced from [Anthropic's Claude Haiku 4.5 announcement](https://www.anthropic.com/news/claude-haiku-4-5). Last updated 2026-06-19.* --- # Claude Haiku 4.5 Claude Haiku 4.5 is a large language model developed by Anthropic.

Claude Haiku 4.5 — Files