Claude Haiku 4.5
Fast Claude lane for lightweight agents, office tasks, and responsive chat
ECI STANDING#96 of 266
SCORE142.37139.8–144.07 CI
FRONTIER LAGLaunched 6.5 months behindScores about what Gemini 2.5 Pro (Mar 2025) did in March 2025.
SCORES LIKE THESE MODELSQwen3.5-35B-A3BAlibaba · Feb 2026142.53GPT-5.5 InstantOpenAI · May 2026142.5
Full Epoch Capabilities Index ranking ↗Gemini 2.5 Pro (May 2025)Google DeepMind · May 2025142.47
Qwen3-MaxAlibaba · Sep 2025142.43From the lab
Launch announcement · Oct 15, 2025Released Claude Haiku 4.5RELEASE DATEOct 15, 2025
WEIGHTSClosed weights
CONTEXT WINDOW200K
MAX OUTPUT64K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image, pdf
OUTPUTStext
Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.