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

March 26, 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 Opus 4.6 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 vs Nemotron 3 Super (120B A12B)

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