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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 465 models

Side by side

Claude 4.6 Opus Thinking compared

Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.

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Claude 4.6 Opus ThinkingAnthropicThis modelClaude 4.7 OpusAnthropicRemove
ProviderAnthropicAnthropic
Discovery tierFrontierFrontier
AddedFeb 5, 2026Apr 16, 2026
Limits
Context window1M1M
Max output128K128K
Average output1.4K tokens742 tokens
Pricing, USD per 1M tokens
Input$5.00$5.00
Output$25.00$25.00
Cache read$0.50$0.50
Performance
Throughput77.0 tok/sBest76.9 tok/s
Time to first token1.9 sBest1.9 s
Request success (24h)100.0%Best99.5%
Benchmark indexes
Intelligence Index31.9Best30.9
Capabilities
ReasoningYesYes
ToolsYesYes
VisionYesYes
Structured outputYesYes
PDF inputYesYes
Reasoning effortlow, medium, high, xhigh, maxlow, medium, high, xhigh, max

Public evaluations

Benchmarks

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

  • Claude 4.6 Opus Thinking
  • Claude 4.7 Opus

Intelligence Index

  • Claude 4.6 Opus Thinking31.9
  • Claude 4.7 Opus30.9

Claude 4.6 Opus Thinking tested at max reasoning effort

Claude 4.6 Opus Thinking: Better than 74% of 326 scored models

3.8Catalog models by score55.1

Agentic work

  • AA-Briefcasev1.1

    Agentic knowledge work, rated head to head

    • Claude 4.6 Opus Thinking: —
    • Claude 4.7 Opus: 1,067 Elo

Document reasoning

  • AA-LCRv1.1

    Reasoning across long documents

    • Claude 4.6 Opus Thinking: 78.0%Top
    • Claude 4.7 Opus: 75.7%

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • Claude 4.6 Opus Thinking: 39.9%Top
    • Claude 4.7 Opus: 33.3%

  • GPQA Diamond

    Graduate-level science questions

    • Claude 4.6 Opus Thinking: 89.6%Top
    • Claude 4.7 Opus: 88.5%

  • IFBench

    Following precise output instructions

    • Claude 4.6 Opus Thinking: 53.1%Top
    • Claude 4.7 Opus: 43.6%

Legacy evaluations

  • Terminal-Bench Hard

    Earlier terminal task suite

    • Claude 4.6 Opus Thinking: 46.2%
    • Claude 4.7 Opus: 54.5%Top

  • τ²-Bench Telecom

    Tool use in a customer-support simulation

    • Claude 4.6 Opus Thinking: 92.1%Top
    • Claude 4.7 Opus: 74.0%

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • Claude 4.6 Opus Thinking: 78.0%Top
    • Claude 4.7 Opus: 75.7%

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
77.0 tok/s
Faster than 50% of 250 models
Time to first token
1.9 s
Quicker than 79% of 250 models
Prompt cache hits
45.7%
About $2.95 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.