Claude 4.6 Opus Thinking

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

Reasoning
Vision
Native PDF input
Tool Calling
Structured Output

Added Feb 5, 2026

Pricing

Auto routing · per 1M tokens

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

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Specifications

Context window: 1M
Max output: 128K
Avg output (7d): 1.7K tokens; Longer than 87% of models

Benchmarks

Artificial Analysis

Vectara

Design Arena

Sourced from Artificial Analysis.

Intelligence Index

31.9

Better than 84% of models compared

Agentic work

T²-Bench Telecom (legacy)

Legacy fallback · Conversational AI agents in dual-control scenarios

92.1%

Better than 87% of models compared

Document reasoning

AA-LCR v1.1

Long context reasoning with updated grading

78.0%

Better than 79% of models compared

Reasoning

HLE

Humanity's Last Exam

39.9%

Better than 88% of models compared

IFBench

Instruction-following benchmark

53.1%

Better than 63% of models compared

CritPt

Research-level physics reasoning

12.6%

Coding

Terminal-Bench Hard (legacy)

Legacy fallback · Agentic coding and terminal use

46.2%

Better than 93% of models compared

Knowledge

AA-Omniscience Accuracy

Proportion of correctly answered questions

47.0%

AA-Omniscience Hallucination Rate

Rate of incorrect answers among non-correct responses

62.8%

Legacy benchmarks

GPQA Diamond (legacy)

Graduate-level scientific reasoning

89.6%

Better than 88% of models compared

AA-LCR (unversioned / legacy)

Long context reasoning evaluation