Claude 4.5 Opus
Anthropic · 2026
Anthropic's most intelligent model with extended thinking, superior reasoning, and 200K context.
Quick Facts
Parameters
Undisclosed
Context Window
200K tokens
Modalities
text, image, audio
Open Source
No
Pricing
$20/mo Pro / $30/user/mo Team
Released
2026
Developer
Anthropic
About
Claude 4.5 Opus is Anthropic's most advanced and intelligent AI model, representing the pinnacle of the Claude lineup. It features extended thinking capabilities enabling deeper reasoning chains for complex problem-solving, mathematical proofs, and scientific analysis. With a 200K token context window, enhanced multimodal understanding, and superior instruction following, Claude 4.5 Opus sets new standards for AI capability across coding, research, and analytical domains. It is the model of choice for professionals requiring the highest level of cognitive performance.
Strengths
- +Most intelligent AI model with deepest reasoning
- +Extended thinking for complex multi-step problems
- +Superior coding and mathematical capabilities
- +Enhanced safety with advanced Constitutional AI
Weaknesses
- −Highest cost tier in Claude lineup
- −Slower response for extended thinking tasks
- −Overkill for everyday simple queries
Best For
Frontier research and scientific discovery
Complex mathematical proofs and theoretical analysis
Advanced software architecture and design
High-stakes professional decision-making
Pricing
Pro
$20/mo
- Claude 4.5 Opus access
- Extended thinking
- Projects
Team
$30/user/mo
- All Pro features
- Shared workspaces
- Priority support
API
$18.00/1M input tokens
- Pay-as-you-go
- 200K context
- Extended thinking
- Multimodal
Technical Specs
Parameters
Undisclosed
Context Window
200K tokens
Modalities
text, image, audio
Languages
Open Source
No
Developer
Anthropic
Released: 2026
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