Claude Opus 5.5

ANTHROPIC Developer Architecture Profile

OpenRouter ↗HuggingFace ↗

Intelligence (ELO)1483Chatbot Arena Verified

Max Context Limit1,000,000Max Out: 128,000 tokens

Prompt Caching95% OFF$0.20 / 1M cached

Standard API / 1M$24.00🧠 Deep Reasoner

Model Capabilities & Contract SLAs

Fictional
Reasoning
Agentic
Coding & Logic
📋 Strict JSON Schema
🛠️ Native Tool Calling
🧠 Extended Test-Time Reasoning

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...

Granular Pricing Matrix

Input Tokens (Standard Prompt)$4.00 / 1M

⚡ Cached Input (Prompt Cache Read)95% OFF$0.20 / 1M

Output Tokens (Completion)$20.00 / 1M

Pricing data via OpenRouter. Sync: 10/2/2026

Evaluate Competitors

VS Engine MatchupClaude Opus 5.5 vs OpenAI: GPT-5 Nano VS Engine MatchupClaude Opus 5.5 vs OpenAI: GPT-5.5 VS Engine MatchupClaude Opus 5.5 vs Google: Nano Banana (Gemini 2.5 Flash Image)VS Engine MatchupClaude Opus 5.5 vs OpenAI: GPT-5 Nano (batch)VS Engine MatchupClaude Opus 5.5 vs Google: Gemini 2.5 Flash Lite (batch)VS Engine MatchupClaude Opus 5.5 vs Google: Gemini 2.5 Flash