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Claude Haiku 4.5

Claude Haiku 4.5 matches Sonnet 4's coding quality while running about twice as fast at roughly one-third the price, making it ideal for low-latency chat assistants, support bots, and pair programming. Pair it with Sonnet 4.5 to plan complex work and fan out execution across parallel Haiku workers.

  • Vision
  • Native PDF input
  • Tool Calling
  • Structured Output

Added Oct 15, 2025

Pricing

Auto routing · per 1M tokens
Input
$1.00
Output
$5.00
Cache read
$0.10
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Specifications

Context window
200K
Max output
64K
Avg output (7d)
253 tokens
Longer than 19% of models

Benchmarks

Sourced from Artificial Analysis.

Intelligence Index

15.4

Better than 61% of models compared

Agentic work

T²-Bench Telecom (legacy)

Legacy fallback · Conversational AI agents in dual-control scenarios

32.5%

Better than 40% of models compared

Document reasoning

AA-LCR v1.1

Long context reasoning with updated grading

49.7%

Better than 43% of models compared

MLCR-AA

Medical long-context reasoning

4.4%

Better than 16% of models compared

Reasoning

HLE

Humanity's Last Exam

4.2%

Better than 16% of models compared

IFBench

Instruction-following benchmark

42.0%

Better than 44% of models compared

CritPt

Research-level physics reasoning

0.0%

Coding

Terminal-Bench Hard (legacy)

Legacy fallback · Agentic coding and terminal use

27.3%

Better than 69% of models compared

LiveCodeBench

Contamination-free coding benchmark

51.1%

Better than 57% of models compared

Math

AIME 2025

American Invitational Mathematics Examination 2025

39.0%

Better than 40% of models compared

Knowledge

MMLU-Pro

Professional and academic subject knowledge

80.0%

Better than 67% of models compared

AA-Omniscience Accuracy

Proportion of correctly answered questions

14.4%

AA-Omniscience Hallucination Rate

Rate of incorrect answers among non-correct responses

25.7%

Legacy benchmarks

GPQA Diamond (legacy)

Graduate-level scientific reasoning

64.6%

Better than 40% of models compared

AA-LCR (unversioned / legacy)

Long context reasoning evaluation

49.7%

Better than 42% of models compared

Last updated Oct 14, 2026

Artificial Analysis

Providers

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