Claude Opus 4.5

Multimodal

Anthropic

Claude Opus 4.5 is a premium model combining maximum intelligence with practical performance. The world's best model for coding, agents, and computer use. The most reliably aligned model with the best resistance to prompt injection among all frontier models. Supports extended thinking, 200K token context window, 64K max output tokens, and a new effort parameter for controlling reasoning depth.

Key Specifications

Parameters

-

Context

200.0K

Release Date

November 23, 2025

Average Score

87.8%

Timeline

Key dates in the model's history

Announcement / Last Update

November 23, 2025

Today

May 9, 2026

Technical Specifications

Parameters

-

Training Tokens

-

Knowledge Cutoff

March 1, 2025

Family

-

Capabilities

MultimodalZeroEval

Pricing & Availability

Input (per 1M tokens)

$5.00

Output (per 1M tokens)

$25.00

Max Input Tokens

200.0K

Max Output Tokens

64.0K

Supported Features

Function CallingStructured OutputCode ExecutionWeb SearchBatch InferenceFine-tuning

Benchmark Results

Model performance metrics across various tests and benchmarks

Programming

Programming skills tests

SWE-Bench Verified

Budget thinking 64K, interleaved scratchpads, context 200K, effort by (high), standard settings • Self-reported

81.0%

Reasoning

Logical reasoning and analysis

GPQA

Budget thinking 64K, interleaved scratchpads, context 200K, effort by (high) • Self-reported

87.0%

Other Tests

Specialized benchmarks

MMMLU

Budget thinking 64K, interleaved scratchpads, context 200K, effort by (high) • Self-reported

91.0%

MMMU (validation)

Budget thinking 64K, interleaved scratchpads, context 200K, effort by (high) • Self-reported

81.0%

TAU2 Retail

Budget thinking 64K, interleaved scratchpads, context 200K, effort by (high) • Self-reported

89.0%

TAU2 Telecom

Budget thinking 64K, interleaved scratchpads, context 200K, effort by (high) • Self-reported

98.0%

License & Metadata

License

proprietary

Announcement Date

November 23, 2025

Last Updated

November 23, 2025

Compare Claude Opus 4.5

All comparisons

vs Claude 3.5 Sonnet vs Claude 3 Opus vs Claude Sonnet 4.6 vs MiniMax M2.1 vs Grok-3 Mini vs Mistral Large 2 vs GPT-5.1 Instant vs GPT-5 Medium

Articles about Claude Opus 4.5

Anthropic Surpasses OpenAI in Annual Recurring Revenue

Anthropic has reportedly crossed $25B ARR, overtaking OpenAI for the first time. Ramp data shows 73% of new enterprise customers now choose Claude.

Harvard Physicist Did a Year's Research in Two Weeks With Claude

Harvard Physicist Did a Year's Research in Two Weeks With Claude

Professor Matthew Schwartz used Claude Opus 4.5 to complete a theoretical physics paper through 270 sessions and 51,248 messages — calling it 'vibe physics.'

Anthropic Accidentally Leaked Its Most Dangerous AI Model

Anthropic Accidentally Leaked Its Most Dangerous AI Model

Security researchers found nearly 3,000 unpublished Anthropic documents in a public data cache — including details on Claude Mythos, a new model with unprecedented cybersecurity capabilities.

Similar Models

Claude 3.5 Sonnet

Anthropic

Best score:0.9 (HumanEval)

Released:Jun 2024

Price:$3.00/1M tokens

Claude 3 Opus

Anthropic

Best score:1.0 (ARC)

Released:Feb 2024

Price:$15.00/1M tokens

Claude Opus 4.6

Anthropic

Best score:1.0 (TAU)

Released:Feb 2026

Price:$5.00/1M tokens

Claude Sonnet 4.5

Anthropic

Best score:0.9 (TAU)

Released:Sep 2025

Price:$3.00/1M tokens

Claude Sonnet 4.6

Anthropic

Best score:0.9 (GPQA)

Released:Feb 2026

Price:$3.00/1M tokens

Claude Opus 4.1

Anthropic

Best score:0.8 (TAU)

Released:Aug 2025

Price:$15.00/1M tokens

Claude 3.7 Sonnet

Anthropic

Best score:0.8 (GPQA)

Released:Feb 2025

Price:$3.00/1M tokens

Claude 3 Sonnet

Anthropic

Best score:0.9 (ARC)

Released:Feb 2024

Price:$3.00/1M tokens

Recommendations are based on similarity of characteristics: developer organization, multimodality, parameter size, and benchmark performance. Choose a model to compare or go to the full catalog to browse all available AI models.