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
23.7
Reasoning
GPQA Diamond
Graduate-level scientific reasoning
64.6%
Better than 46% of models compared
HLE
Humanity's Last Exam
4.3%
Better than 20% of models compared
IFBench
Instruction-following benchmark
42.0%
Better than 45% of models compared
T²-Bench Telecom
Conversational AI agents in dual-control scenarios
32.5%
Better than 41% of models compared
AA-LCR
Long context reasoning evaluation
43.7%
Better than 56% of models compared
CritPt
Research-level physics reasoning
0.0%
Coding
SciCode
Python programming for scientific computing
34.4%
Better than 56% of models compared
Terminal-Bench Hard
Agentic coding and terminal use
27.3%
Better than 70% 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 Jun 28, 2026
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