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Claude Opus 5

Heavyweight Dense Frontier Foundation
Official Source & Paper
Anthropic logo Anthropic 📄 Proprietary API 🌍 United States (US) 🗓️ Effective Date: 20.07.2026

Anthropic's premier heavyweight flagship designed for doctoral-level scientific analysis, enterprise legal synthesis, and massive architectural engineering.

Model Size / Parameters Proprietary (>1T MoE) Architecture: Heavyweight Dense Frontier Foundation
Context Window (Input) 1M tokens Token Capacity
Max Output Tokens 128k tokens Single Generation Limit
Supported Modalities Text, Code, Vision, Audio Native Multimodal Ingestion
License & Access Proprietary API Open Weights vs. API
Release Date July 2026 Effective Date: 20.07.2026

Verified Benchmark Results

Standardized academic and industry evaluation benchmarks (Effective Date: 20.07.2026).

MMLU-Pro / 5-Shot General Intellect
94.5%
SWE-bench Verified Software Engineering
72.8%
MATH 500 / AIME Mathematical Reasoning
97.1%
GPQA Diamond Doctoral Science
82.4%
HumanEval / Python Algorithm Synthesis
96.2%

Pricing & Cost Efficiency

Official API token pricing and self-hosted licensing terms.

Input Pricing (Prompt)
$12.00 / 1M tokens
Per 1 million processed tokens
Output Pricing (Generation)
$60.00 / 1M tokens
Per 1 million generated tokens
Verified Datasheet: Source: Anthropic Research Documentation • Effective Date: 20.07.2026
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