treyleo16/ haiku-5-5:latest

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Claude Haiku 5.5

Claude Haiku 5.5 is Anthropic’s ultra-fast, high-efficiency model in the Claude 5.5 family. Engineered for high-throughput execution, sub-agent task loops, and real-time responsiveness, Haiku 5.5 brings a 1M token context window, adaptive thinking, and computer use to Anthropic’s speed-and-cost tier.

Model Overview

Haiku 5.5 is optimized for low-latency interactive applications, parallel sub-agent fan-out, and large-scale classification and extraction. It delivers performance matching previous-generation Sonnet models while reducing API running costs by approximately 75% compared to Haiku 4.5.

  • Developer: Anthropic
  • Model Class: Claude 5.5 Family (Ultra-Fast / High Efficiency)
  • Release Date: October 7, 2026
  • Knowledge Cutoff: June 2026
  • Primary Target Use Cases: High-volume text processing, sub-agent orchestration, live conversational assistants, computer/browser automation, and focused codebase edits.

Core Capabilities & Performance Profile

Ultra-Low Latency & Adaptive Thinking

  • Tunable Effort Controls: First Haiku model to support adaptive thinking and explicit effort controls (low, medium, high, xhigh, max), allowing developers to trade reasoning depth directly against latency and token cost.
  • Sub-Agent Orchestration: Acts as a cost-effective worker node for higher-tier planner models (Opus 5.5 / Sonnet 5.5), executing parallel execution loops without bottlenecking system speed.

Expanded Context & Generation Capacity

  • 1 Million Token Context Window: Expanded from Haiku 4.5’s 200k limit, allowing full-repository scans, long document ingestion, and extended multi-turn chat threads.
  • 128,000 Output Tokens: Supports long completions for multi-file edits, code generation, and comprehensive document summaries.

Computer Use & Browser Automation

  • Native OS & Web Navigation: Integrates full computer use capabilities (computer_toolset_20260801) and browser automation tools, executing repetitive desktop and web UI tasks.

Technical Specifications

Parameter Specification
API Model ID claude-haiku-5-5
Context Window 1,000,000 tokens (1M)
Max Output Tokens 128,000 tokens (128k)
Input Modalities Text, Code, Images (Vision)
Output Modalities Text, Code, Structured JSON
Reasoning Engine Adaptive Thinking (effort: low, medium, high, xhigh, max)
Native Capabilities Computer Use, Browser Use, Parallel Tool Calling, Structured Outputs
Tokenizer Updated Claude 5.5 Tokenizer