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Claude Opus 4.6 (Fast)
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AnthropicAnthropicClaude ModeratedReleased 2026-04-07

Claude Opus 4.6 (Fast)

1M context$30.00/M input$150.00/M output

Claude Opus 4.6 (Fast) is a variant of Anthropic's Opus 4.6 model, designed to deliver identical capabilities with higher output speed. It supports a context length of up to 1 million tokens and offers premium pricing for faster processing. The model is optimized for professional tasks, coding, and agentic workflows, making it suitable for complex, multi-step operations.

What is Claude Opus 4.6 (Fast)?

Claude Opus 4.6 (Fast) is an AI model from Anthropic that Agent Mag tracks for pricing, context window, modalities, benchmarks, and API compatibility. Builders can use this page to compare Claude Opus 4.6 (Fast) against other models for agent workflows and production deployments.

Model ID

Claude Opus 4.6 (Fast) is a variant of Anthropic's Opus 4.6 model, designed to deliver identical capabilities with higher output speed. It supports a context length of up to 1 million tokens and offers premium pricing for faster processing. The model is optimized for professional tasks, coding, and agentic workflows, making it suitable for complex, multi-step operations.

Architecture & Specifications
Tokenizer
Claude
Released
2026-04-07
Modalities
Input
textimage
Output
text
Supported Parameters
include_reasoningmax_tokensreasoningresponse_formatstopstructured_outputstemperaturetool_choicetoolstop_pverbosity
Strengths
  • Higher output speed compared to standard Opus 4.6
  • Supports up to 1 million tokens in context
  • Optimized for professional tasks and coding workflows
  • Effective for agentic operations and multi-step tasks
Limitations
  • Premium pricing at 6x the standard rate
  • Structured output error rate of 37.95%
  • Tool call error rate of 0.65%
Recommended Use Cases
Large codebase navigation and refactoring
Multi-step debugging and workflow execution
Drafting documents and analyzing data
Agentic coding tasks
End-to-end project orchestration

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Data enriched Apr 24, 2026. Pricing from OpenRouter API.