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Anthropic · Efficient

Claude Haiku Latest

Added Mar 29, 2026

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Use in the app

Compatibility alias that routes to the newest version of Claude Haiku. Currently routes to Claude Haiku 5.5 with adaptive thinking.

  • Reasoning
  • Tools
  • Vision
  • Structured output
  • PDF input
Input
Text, Images
Output
Text
Reasoning effort
low · medium · high · xhigh · max
Discovery tier
Efficient

Pricing

USD per 1M tokens
Input
$0.10
Output
$0.50
Cache read
$0.01
Cache write
$0.13
$0.20 for a 1-hour cache

Reference prices as published by the model provider. API example

Specifications

Context window
1M
Max output
128K
Average output (7 days)
832 tokens
Longer than 66% of 465 models

Side by side

Claude Haiku Latest compared

Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.

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Claude Haiku LatestAnthropicThis modelClaude Sonnet 5.5 ThinkingAnthropicRemove
ProviderAnthropicAnthropic
Discovery tierEfficientFrontier
AddedMar 29, 2026Sep 28, 2026
Limits
Context window1M1M
Max output128K128K
Average output832 tokens3K tokens
Pricing, USD per 1M tokens
Input$0.10Best$2.00
Output$0.50Best$10.00
Cache read$0.01Best$0.10
Cache write$0.13Best$2.50
Performance
Throughput184.0 tok/s226.6 tok/sBest
Time to first token3.6 sBest5.7 s
Request success (24h)99.9%Best98.5%
Benchmark indexes
Intelligence Index43.446.8Best
Capabilities
ReasoningYesYes
ToolsYesYes
VisionYesYes
Structured outputYesYes
PDF inputYesYes
Reasoning effortlow, medium, high, xhigh, maxlow, medium, high, xhigh, max

Public evaluations

Benchmarks

Independent evaluation results, with how each score ranks among the models in the Noumen catalog.

  • Claude Haiku Latest
  • Claude Sonnet 5.5 Thinking

Intelligence Index

  • Claude Haiku Latest43.4
  • Claude Sonnet 5.5 Thinking46.8

Claude Haiku Latest tested at max reasoning effort

Claude Haiku Latest: Better than 88% of 326 scored models

3.8Catalog models by score55.1

Agentic work

  • AutomationBench-AA

    Workflow automation, penalized for guardrail violations

    • Claude Haiku Latest: 35.4%
    • Claude Sonnet 5.5 Thinking: 59.4%Top

  • AutomationBench-AA tasks completed

    Workflows finished end to end without a guardrail violation

    • Claude Haiku Latest: 13.9%
    • Claude Sonnet 5.5 Thinking: 29.4%Top

  • Harvey LAB-AAv1.1

    Legal tasks passed in full, with no material hallucination

    • Claude Haiku Latest: 0.6%
    • Claude Sonnet 5.5 Thinking: —

  • AA-Briefcasev1.1

    Agentic knowledge work, rated head to head

    • Claude Haiku Latest: 1,575 Elo
    • Claude Sonnet 5.5 Thinking: 1,635 EloTop

  • GDPval-AAv2.1

    Economically valuable occupational tasks, rated head to head

    • Claude Haiku Latest: 1,619 EloTop
    • Claude Sonnet 5.5 Thinking: 1,548 Elo

Document reasoning

  • GDP.pdf

    Professional reasoning over PDF documents, all-pass rate

    • Claude Haiku Latest: 20.8%
    • Claude Sonnet 5.5 Thinking: 25.2%Top

  • AA-LCRv1.1

    Reasoning across long documents

    • Claude Haiku Latest: 82.7%Top
    • Claude Sonnet 5.5 Thinking: 78.0%

  • MLCR-AA

    Long-context reasoning over medical records

    • Claude Haiku Latest: 35.0%Top
    • Claude Sonnet 5.5 Thinking: 18.9%

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • Claude Haiku Latest: 44.4%
    • Claude Sonnet 5.5 Thinking: 45.8%Top

Coding

  • Terminal-Benchv4.0

    Practical software engineering in a terminal

    • Claude Haiku Latest: 32.8%
    • Claude Sonnet 5.5 Thinking: 43.9%Top

  • SciCode

    Scientific computing in Python

    • Claude Haiku Latest: 55.0%Top
    • Claude Sonnet 5.5 Thinking: 53.7%

Legacy evaluations

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • Claude Haiku Latest: 82.7%Top
    • Claude Sonnet 5.5 Thinking: 78.0%

Scores from Artificial Analysis, updated Oct 26, 2026. Claude Haiku Latest was tested at max reasoning effort; compare scores measured at the same effort.Artificial Analysis

Live routing data

Performance and reliability

Recent averages across requests routed for this model. Your own speed depends on prompt length, reasoning effort and load.

Throughput
184.0 tok/s
Faster than 81% of 250 models
Time to first token
3.6 s
Quicker than 49% of 250 models
Prompt cache hits
0.0%
About $0.10 per 1M input tokens with caching
Request success (24h)
99.9%
Reliable

Cache hits are the share of input tokens recently served from a prompt cache across all requests. They are not a forecast of your own hit rate.

Hourly request success · last 72 hoursLowest hour 93.1%
  • Healthy (98% or more)
  • Degraded (90–98%)
  • Down (under 90%)
  • No requests

Developers

Use it through the API

Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.

Read the quickstart
curl https://www.noumen.xyz/api/v1/chat/completions \
  -H "Authorization: Bearer $NOUMEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-haiku-latest",
    "reasoning_effort": "medium",
    "messages": [{ "role": "user", "content": "Explain this stack trace." }]
  }'
import os
from openai import OpenAI

client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
    model="anthropic/claude-haiku-latest",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

Anthropic

Other Anthropic models, starting with the same family.