Opus 4.6
The Ceiling of Intelligence: A sovereign reasoning engine designed for the most complex, high-stakes engineering and research tasks.
About the Model
Released on February 4, 2026, Claude Opus 4.6 is Anthropic’s smartest model. It introduces "Adaptive Thinking" and "Context Compaction," allowing it to sustain long-running agentic tasks (like deep software refactoring) that would typically overflow a standard context window.
Model Key Capabilities
Adaptive Thinking Toggles:
Offers four effort levels (Low, Medium, High, Max) so developers can balance cost against logical depth.
Context Compaction:
Automatically summarizes older conversation history to allow for "infinite" feeling agent sessions without losing core goal-state.
Parallel Sub-Agents:
The first model to natively spin up independent sub-tasks to run tools in parallel for complex cybersecurity or coding investigations.
Applications & Use Cases
Complex Codebase Refactors:
Navigating and fixing bugs across large, unfamiliar repositories (e.g., Devin and Windsurf workflows).
High-Stakes Research:
Legal, financial, and scientific discovery where edge-case analysis is mandatory.
Cybersecurity Defense:
Performing end-to-end vulnerability investigations with 90%+ success rates in blind tests.
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Model Specifications
General | |
|---|---|
Model Provider | Anthropic |
Main Use Cases |
|
Intelligence | |
Reasoning Effort | Adaptive (4 Levels) |
GPQA Diamond | 91.3% |
Memory | |
Max Context | 1.0M Tokens |
Speed | |
Output Limit | 128K Tokens |
Throughput | 22 Tokens/Sec |
