Claude Opus 4.6
Anthropic
February 2026 Opus release that added a 1M-token context window at standard pricing and adaptive thinking. The first Opus with the dateless pinned-snapshot model ID format. Superseded by Opus 4.7.
Strengths
- 1M-token context window at standard pricing
- Adaptive thinking automatically balances speed and depth
- 128K max output for long documents and codebases
- Strong agentic coding and reasoning at $5/$25
Caveats
- Superseded by Opus 4.7 (step-change agentic coding gains)
- Premium Opus tier versus Sonnet 4.6 for cost-sensitive workloads
- Vendor
- Anthropic
- Context Window
- 1,000,000 tokens
- Max Output
- 128,000 tokens
- License
- Proprietary
- Release Date
- 2026-02-05
- Training Cutoff
- 2025-08-31
- Modalities
- textimage
Capabilities
Vision
Audio
Video
Tool Use
Resources
Pricing
$5 per 1M input tokens, $25 per 1M output tokens; full 1M-token context at standard pricing. Prompt caching, Batch API (50% off), and Fast mode (beta) available.