What is Anthropic: Claude Haiku 4.5's context window?

Anthropic: Claude Haiku 4.5 supports a context window of 200,000 tokens, allowing you to process large documents and maintain long conversations.

How to use Anthropic: Claude Haiku 4.5 API via Ofox?

Simply set your base URL to https://api.ofox.run/v1 and use your Ofox API key. The API is OpenAI-compatible — just change the base URL and API key in your existing code.

Anthropic: Claude Haiku 4.5

Name: Anthropic: Claude Haiku 4.5
Brand: anthropic
Price: 1 USD
Availability: InStock
Rating: 5 (1 reviews)

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anthropic/claude-haiku-4.5

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Claude Haiku 4.5 is Anthropic's fastest and most cost-effective model, released on 2025-10-15 and optimized for near-instant responsiveness. It excels at coding tasks, while also supporting vision, tool use, PDF input, and prompt caching. Context: 200K tokens, output: 64K. At $1/M input and $5/M output tokens, it is a strong fit for high-volume, latency-sensitive workloads. Documents and screenshots can be processed directly, and cached input reads are billed at just $0.1/M tokens. Available via OpenAI and Anthropic protocols.

Context Window

200K

Max Output Tokens

64K

Released

2025-10-15

Capabilities

VisionFunction CallingPrompt CachingPDF Input

Available Providers

Bedrock

Supported Protocols

openaianthropic

Providers

Bedrock

Input Tokens

$1/M

Output Tokens

$5/M

Cache Read

$0.1/M

Cache Write (5 min)

$1.25/M

Cache Write (1 hour)

$2/M

Web Search

$0.015/R

Protocols

openai/v1/chat/completions/v1/responses

anthropic

Code Examples

import anthropic

client = anthropic.Anthropic(
    base_url="https://api.ofox.run/anthropic",
    api_key="YOUR_OFOX_API_KEY",
)

message = client.messages.create(
    model="anthropic/claude-haiku-4.5",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
)

print(message.content[0].text)

Uptime & Status

Benchmarks

LMArena ↗Evaluated as claude-haiku-4-5-20251001

Anthropic: Claude Haiku 4.5 scores 1412 in the Overall category of the LMArena text leaderboard (style control), ranking #112 of 374 models based on 104,820 human preference votes (updated 2026-07-12).

Benchmark scores for claude-haiku-4-5-20251001 on LMArena
Category	Arena Score	95% CI	Rank	Votes
Overall	1412	1409–1415	#112 of 374	104,820
Hard Prompts	1440	1436–1443	#98 of 374	62,275
Coding	1479	1474–1484	#78 of 369	26,029
Math	1399	1391–1407	#127 of 362	6,059
Creative Writing	1389	1383–1394	#102 of 372	16,073
Instruction Following	1415	1411–1419	#90 of 374	31,589
Chinese	1438	1429–1448	#116 of 344	5,166

Source: LMArena · CC BY 4.0 · Updated 2026-07-12 · Methodology ↗ · Ranks compare models within each category of the LMArena text leaderboard (style control). Scores come from third-party human preference evaluations, not from OFOX.