Anthropic · Frontier

Claude 4.6 Opus

Added Feb 5, 2026

Claude Opus 4.6 supports advanced coding, agentic workflows, and long-context analysis with up to a 1M-token context window.

Reasoning
Tools
Vision
Structured output
PDF input

Input: Text, Images
Output: Text
Reasoning effort: low · medium · high · xhigh · max
Discovery tier: Frontier

Pricing

USD per 1M tokens

Input: $5.00
Output: $25.00
Cache read: $0.50

Reference prices as published by the model provider. API example

Specifications

Context window: 1M
Max output: 128K
Average output (7 days): 1.4K tokens; Longer than 84% of 473 models

Side by side

Compare models

Put Claude 4.6 Opus next to up to three other models. The comparison stays in the link, so you can share it.

TryGemini 3 Flash Thinking Nvidia Nemotron 3.5 Super VL Solar Pro 4 All 3

Public evaluations

Benchmarks

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

Intelligence Index

26.4

Tested at high reasoning effort

Better than 66% of 326 scored models

3.8Catalog models by score55.1

Document reasoning

AA-LCRv1.1
67.0%
Reasoning across long documents
Better than 44% of 309 scored models

Reasoning and knowledge

Humanity’s Last Exam
19.1%
Expert-level questions across academic fields
Better than 46% of 323 scored models
GPQA Diamond
84.0%
Graduate-level science questions
Better than 56% of 291 scored models
IFBench
44.6%
Following precise output instructions
Better than 40% of 215 scored models

Legacy evaluations

Terminal-Bench Hard
48.5%
Earlier terminal task suite
Better than 90% of 212 scored models
τ²-Bench Telecom
84.8%
Tool use in a customer-support simulation
Better than 65% of 214 scored models
AA-LCR (unversioned)
67.0%
Long-context reasoning, earlier grading
Better than 44% of 309 scored models

Scores from Artificial Analysis, updated Oct 26, 2026. Claude 4.6 Opus was tested at high 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: 50.8 tok/s; Faster than 36% of 256 models
Time to first token: 1.6 s; Quicker than 82% of 256 models
Prompt cache hits: 2.0%; About $4.91 per 1M input tokens with caching
Request success (24h): 100.0%; 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 95.8%

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-opus-4.6",
    "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-opus-4.6",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

Anthropic

Other Anthropic models, starting with the same family.

Document reasoning

AA-LCRv1.1

Reasoning and knowledge

Humanity’s Last Exam

GPQA Diamond

IFBench

Legacy evaluations

Terminal-Bench Hard

τ²-Bench Telecom

AA-LCR (unversioned)