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Anthropic · Frontier

Claude 4.6 Opus Thinking

Added Feb 5, 2026

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Use in the app

Claude Opus 4.6 with adaptive thinking enabled (default effort: high).

  • 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 83% of 473 models

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Public evaluations

Benchmarks

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

Intelligence Index

31.9

Tested at max reasoning effort

Better than 74% of 326 scored models

3.8Catalog models by score55.1

Document reasoning

  • AA-LCRv1.1

    78.0%

    Reasoning across long documents

    Better than 65% of 309 scored models

Reasoning and knowledge

  • Humanity’s Last Exam

    39.9%

    Expert-level questions across academic fields

    Better than 76% of 323 scored models

  • GPQA Diamond

    89.6%

    Graduate-level science questions

    Better than 75% of 291 scored models

  • IFBench

    53.1%

    Following precise output instructions

    Better than 53% of 215 scored models

Legacy evaluations

  • Terminal-Bench Hard

    46.2%

    Earlier terminal task suite

    Better than 88% of 212 scored models

  • τ²-Bench Telecom

    92.1%

    Tool use in a customer-support simulation

    Better than 78% of 214 scored models

  • AA-LCR (unversioned)

    78.0%

    Long-context reasoning, earlier grading

    Better than 65% of 309 scored models

Scores from Artificial Analysis, updated Oct 26, 2026. Claude 4.6 Opus Thinking 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
113.4 tok/s
Faster than 67% of 256 models
Time to first token
2.6 s
Quicker than 59% of 256 models
Prompt cache hits
33.0%
About $3.51 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 100.0%
  • 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:thinking",
    "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:thinking",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

Anthropic

Other Anthropic models, starting with the same family.