Claude Opus 4.6 vs Claude Opus 4.5 Comparison

Comparing Claude Opus 4.6 and Claude Opus 4.5 across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

9 benchmarks

Claude Opus 4.6 outperforms in 7 benchmarks (ARC-AGI v2, GPQA, MMMLU, OSWorld, Tau2 Retail, Tau2 Telecom, Terminal-Bench 2.0), while Claude Opus 4.5 is better at 2 benchmarks (MCP Atlas, SWE-Bench Verified).

Claude Opus 4.6 significantly outperforms across most benchmarks.

Tue Mar 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Cost data unavailable.

Lowest available price from all providers
Tue Mar 17 2026 • llm-stats.com
Anthropic
Claude Opus 4.6
Input tokens$0.00
Output tokens$0.00
Best providerUnknown Organization
Anthropic
Claude Opus 4.5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
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Context Window

Maximum input and output token capacity

Only Claude Opus 4.5 specifies input context (200,000 tokens). Only Claude Opus 4.5 specifies output context (64,000 tokens).

Anthropic
Claude Opus 4.6
Input- tokens
Output- tokens
Anthropic
Claude Opus 4.5
Input200,000 tokens
Output64,000 tokens
Tue Mar 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 4.6 and Claude Opus 4.5 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Opus 4.6

Text
Images
Audio
Video

Claude Opus 4.5

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Opus 4.6

Proprietary

Closed source

Claude Opus 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.6 was released on 2026-02-05, while Claude Opus 4.5 was released on 2025-11-24.

Claude Opus 4.6 is 2 months newer than Claude Opus 4.5.

Claude Opus 4.6

Feb 5, 2026

1 months ago

2mo newer
Claude Opus 4.5

Nov 24, 2025

3 months ago

Knowledge Cutoff

When training data ends

Claude Opus 4.5 has a documented knowledge cutoff of 2025-03-31, while Claude Opus 4.6's cutoff date is not specified.

We can confirm Claude Opus 4.5's training data extends to 2025-03-31, but cannot make a direct comparison without Claude Opus 4.6's cutoff date.

Claude Opus 4.6

—

Claude Opus 4.5

Mar 2025

Outputs Comparison

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Key Takeaways

Anthropic
Higher ARC-AGI v2 score (68.8% vs 37.6%)
Higher GPQA score (91.3% vs 87.0%)
Higher MMMLU score (91.1% vs 90.8%)
Higher OSWorld score (72.7% vs 66.3%)
Higher Tau2 Retail score (91.9% vs 88.9%)
Higher Tau2 Telecom score (99.3% vs 98.2%)
Higher Terminal-Bench 2.0 score (65.4% vs 59.3%)
Anthropic
Larger context window (200,000 tokens)
Higher MCP Atlas score (62.3% vs 59.5%)
Higher SWE-Bench Verified score (80.9% vs 80.8%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.6
Anthropic
Claude Opus 4.5