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.
Added Oct 15, 2025
Context Window
200.0K
Max Output
64.0K
Input Price (Auto)
$1.00/1M
Output Price (Auto)
$5.00/1M
Cache Read (Auto)
$0.10/1M
Capabilities
Performance metrics and benchmarks
Sourced from Artificial Analysis.
Intelligence Index
31.0
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Coding Index
29.6
GPQA Diamond
Graduate-level scientific reasoning
64.6%
Better than 54% of models compared
HLE
Humanity's Last Exam
4.3%
Better than 23% of models compared
IFBench
Instruction-following benchmark
42.0%
Better than 53% of models compared
T²-Bench Telecom
Conversational AI agents in dual-control scenarios
32.5%
Better than 47% of models compared
AA-LCR
Long context reasoning evaluation
43.7%
Better than 61% of models compared
SciCode
Python programming for scientific computing
34.4%
Better than 62% of models compared
Terminal-Bench Hard
Agentic coding and terminal use
27.3%
Better than 76% of models compared
AIME 2025
American Invitational Mathematics Examination 2025
39.0%
Better than 40% of models compared
MMLU-Pro
Professional and academic subject knowledge
80.0%
Better than 67% of models compared
Last updated May 15, 2026
Artificial AnalysisLiveCodeBench
Contamination-free coding benchmark
51.1%
Better than 57% of models compared
