Google Agent Platform

Claude Opus 5.5

claude-opus-5-5

Claude model for long-running agentic coding and knowledge work

VisionTool CallingCachingReasoningWeb
Talk to Solutions Engineer View docs ⁠‌

Quick facts

Released
September 2026
Model type
Proprietary
Model family
Claude Opus
Input modalities
Supports: Text, Image, PDF
Output modalities
Supports: Text
Available regions
USEUGlobal
Zero data retention
Yes
Available on nexos.ai
Yes

Pricing and specifications of Claude Opus 5.5

Explore Claude Opus 5.5 pricing per million input, output, and cached tokens, along with its context window and maximum output limits.

Input / 1MOutput / 1MCached input / 1MContextMax output
$4.00$20.00$0.201M128K

Available providers

Provider Region Input / 1M Output / 1M Cache / 1M ZDR
Google Agent Platform EU $4.40 $22.00 $0.22
Google Agent Platform US $4.40 $22.00 $0.22
Google Agent Platform Global $4.00 $20.00 $0.20
Bedrock EU $4.40 $22.00 $0.22

Specifications

Context window

1M tokens

Max output

128K tokens

Input

Output

Benchmarks of Claude Opus 5.5

How Claude Opus 5.5 scores on independent benchmarks tracked by Epoch AI.

Quality

Epoch Capabilities Index

168.4

ECI rank

#2 of 271

GPQA Diamond

Graduate-level scientific reasoning

91.1%

ARC-AGI-2

Abstract reasoning on novel puzzles

93.3%

FrontierMath

Expert-level mathematics

96.0%

OTIS Mock AIME

Competition mathematics

100.0%

APEX-Agents

Long-horizon professional services tasks

73.5%

Remote Labor Index

Real freelance projects, end to end

21.3%

SimpleQA Verified

Short-form factual accuracy

72.2%

Benchmark data: Epoch AI, ‘Capabilities & benchmarking’ , licensed under CC BY 4.0 .

Quickstart

Start using Claude Opus 5.5

Model ID

claude-opus-5-5

Base URL

https://api.nexos.ai/v1

Code

 
from openai import OpenAI

# Get your API key from the nexos.ai dashboard
client = OpenAI(
    base_url="https://api.nexos.ai/v1",
    api_key="YOUR_NEXOS_API_KEY",
)

response = client.chat.completions.create(
    model="claude-opus-5-5",
    messages=[{"role": "user", "content": "Hello!"}],
)

print(response.choices[0].message.content)
import OpenAI from 'openai';

// Get your API key from the nexos.ai dashboard
const client = new OpenAI({
  baseURL: 'https://api.nexos.ai/v1',
  apiKey: 'YOUR_NEXOS_API_KEY',
});

const response = await client.chat.completions.create({
  model: 'claude-opus-5-5',
  messages: [{ role: 'user', content: 'Hello!' }],
});

console.log(response.choices[0].message.content);
curl https://api.nexos.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_NEXOS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-opus-5-5",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Other Anthropic models

Models from Anthropic with comparable capabilities and pricing.

ModelInputOutputContextCapabilitiesRegion
Claude Fable 5.1$11.00$55.00872K
VisionToolsCacheThinkWeb
USEUGlobal
Claude Fable 5$11.00$55.00872K
VisionToolsCacheThinkWeb
USEUGlobal
Claude Haiku 4.5$1.10$5.50136K
VisionToolsCacheThinkWeb
USEUGlobal

Start building with Claude Opus 5.5

Access Claude Opus 5.5 and 200+ other AI models through nexos.ai.

Talk to Solutions Engineer Explore all models ⁠‌

FAQ

Common questions about Claude Opus 5.5, its availability and usage.