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
Avg output tokens (7d)
1.5K tokens
Input Price (Auto)
$1.00/1M
Output Price (Auto)
$5.00/1M
Cache Read (Auto)
$0.10/1M
Capabilities
Benchmarks
Benchmarks
Performance metrics and benchmarks
Sourced from Artificial Analysis.
Intelligence Index
24.1
Reasoning
GPQA Diamond
Graduate-level scientific reasoning
64.6%
Better than 42% of models compared
HLE
Humanity's Last Exam
4.2%
Better than 18% of models compared
IFBench
Instruction-following benchmark
42.0%
Better than 44% of models compared
T²-Bench Telecom
Conversational AI agents in dual-control scenarios
32.5%
Better than 40% of models compared
AA-LCR
Long context reasoning evaluation
48.3%
Better than 52% of models compared
CritPt
Research-level physics reasoning
0.0%
Coding
SciCode
Python programming for scientific computing
34.4%
Better than 51% of models compared
Terminal-Bench Hard
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%
Last updated Aug 16, 2026
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