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anthropicanthropic·Oct 15, 2025

Anthropic: Claude Haiku 4.5

anthropic/claude-haiku-4.5
context
200K
Max Output
64K
Input / 1M
$1.00
Output / 1M
$5.00

About

Claude Haiku 4.5 is Anthropic's fastest and most cost-efficient model, designed to deliver near-frontier intelligence at lower latency and cost than larger Claude models. It matches Claude Sonnet 4 on reasoning, coding, and computer-use tasks while running at roughly twice the speed and one-third the cost. It is the first Haiku model to add extended thinking, with controllable reasoning depth and summarized or interleaved thought output, alongside support for tool use, bash, web search, and computer use. Haiku 4.5 scores 73.3% on SWE-bench Verified and supports a 200K token context window with up to 64K output tokens for text and image inputs.

Capabilities

Context Length
200K
Max Output
64K
Reasoning
Yes
In
image, text
Out
text

Benchmarks

View leaderboard
37.1#38 of 133
Intelligence Index
32.6#61 of 118
Coding Index
83.7#18 of 63
Math Index

Reasoning & Knowledge

MMLU-Pro76.0%
GPQA Diamond67.2%
HLE9.7%

Coding & Agentic

LiveCodeBench61.5%
SciCode43.3%
Terminal-Bench Hard27.3%

Math

AIME 202583.7%

Source: Artificial Analysis

Pricing

Full pricing
TypePrice / 1M tokens
Input$1.00
Output$5.00
Cache Read$0.10
Cache Write$1.25
Web Search$0.01 / call

API

API reference

Anthropic-compatible · Model ID anthropic/claude-haiku-4.5

curl https://api.elliotgate.com/v1/chat/completions \
  -H "Authorization: Bearer sk-omg-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-haiku-4.5",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

OFTEN COMPARED

Claude Haiku 4.5 comparisons

Decide which model wins on the dimensions that matter for your workload — context, benchmarks, pricing, or serving latency.