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⚡ Breaking: Claude Opus 4.5 is Here

Anthropic just dropped Opus 4.5, and this might be the biggest upgrade Claude has ever shipped.

This model isn’t just “better.”
It’s dominant — especially in coding, reasoning, and real tool-use benchmarks.

Opus 4.5 outperforms:

• GPT-5.1

• Gemini 3 Pro

• Claude Opus 4.1

• GPT-5.1 Codex-Max

• Every other frontier model in agentic coding + tool use

And the numbers are wild.

📊 Key Benchmarks (Opus 4.5 vs the World)

Below is the newly-released full benchmark sheet — and Opus 4.5 crushes every category from coding → computer use → graduate-level reasoning.

💻 Coding Superpowers: Opus 4.5 Breaks SWE-Bench

This is the stat everyone is talking about:

Opus 4.5 SWE-bench Verified score: 80.9%

Highest ever recorded. Higher than GPT-5.1, Gemini 3 Pro, Claude 4.1, and GPT-5.1 Codex-Max.

Here’s the official chart:

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🛠️ Agentic Tool Use: This Is the Real Story

Coding is huge — but the real breakthrough might be tool use and autonomous workflows.

Opus 4.5 achieves:

• 88.9% Retail and 98.2% Telecom on T2 tool-use benchmarks

• Massive jumps in multi-step decision-making

• Stronger recovery and re-planning abilities

• Better reasoning with real APIs, environments & terminal tasks

This is the first Claude model that truly feels agent-ready.

🧠 Massive Gains in Reasoning

Beyond coding, the model saw huge lifts in:

• Graduate-level reasoning: 87%

• Visual reasoning

• Computer use

• Multilingual Q&A

Benchmarks that normally trade off against each other have all increased simultaneously — meaning Anthropic pushed across the entire reasoning stack, not just coding.

🚀 Bottom Line

Claude Opus 4.5 isn’t just “the next update.”

This may be the best general-purpose coding + reasoning model in the world right now.

Between SWE-bench dominance, massive agentic improvements, and tool-use performance, this release sets Anthropic up as the biggest threat to GPT-5.1 so far.

And the timing?
Absolutely perfect heading into 2025’s agent wars.

Quick Links

• Anthropic Official Statement

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