AI model reference · 2026
Claude Haiku 4.5
Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models.
- Context window
- 200,000 tokens
- Maximum output
- 64,000 tokens
- Base provider API input
- $1.00 / 1M tokens
- Base provider API rate
- Published evidence
- 1 benchmark, 0 Arena results
Overview
About Claude Haiku 4.5
A concise catalog overview. Technical limits and published evaluation evidence are listed separately below.
Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models.
Published evaluations
Benchmark results
Only results mapped to this exact model and backed by a named source appear here. Different evaluation protocols are not treated as interchangeable.
| Benchmark | Score | Evaluation details | Source |
|---|---|---|---|
| SWE-Bench VerifiedA human-validated subset of real GitHub issues used to measure whether a coding agent can produce repository patches that resolve the associated tests. | 66.6% | ResolvedVersion: SWE-Bench Verified 500 · Split: Verified, 500 tasks · Harness: mini-SWE-agent / version 2.0.0 · Attempts: One attempt · Reasoning effort: highProtocol note: Harness version: 2.0.0; Run date: 2026-02-17Methodology | SWE-benchBenchmark owner |
Human preference
Arena results
Arena scores come from blind human preference votes. They are reported separately from task benchmarks and are not used as substitutes for missing benchmark results.
No exact Arena match is available for this model. Similar names and provider variants are not merged automatically.
Technical reference
Specifications and API facts
Technical limits and reference provider prices come from the current catalog unless a reviewed external source is listed. Missing values stay marked as unavailable.
- Provider
- Anthropic
- Release date
- Not available in reviewed sources
- Catalog added
- Oct 15, 2025
- Context window
- 200,000 tokens
- Maximum output
- 64,000 tokens
- Knowledge cutoff
- Not available in reviewed sources
- License
- Not available in reviewed sources
- Input types
- Text, Image, File
- Output types
- Text
- Reasoning
- Supported
- Provider endpoint tool parameters
- Accepts tool parameters
- Base provider API input
- $1.00 / 1M tokens
- Base provider cached input
- $0.10 / 1M tokens
- Base provider API output
- $5.00 / 1M tokens
These are reference provider API rates, not Writingmate checkout charges. Access in Writingmate follows the allowances of your Writingmate plan.
Provenance
Sources and update status
Source links are attached to the facts and evaluations they support. Catalog-only values are not presented as independently verified claims.
- SWE-bench Verified Bash Only LeaderboardSWE-bench · Retrieved Aug 9, 2026
- OpenRouter model catalogOpenRouter
Evidence last updated Aug 9, 2026.
Catalog record updated Oct 15, 2025.
Catalog-added dates describe when a model entered the catalog, not necessarily its public release date.
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