Anthropic: Claude Opus 4.6 (Fast)

Text input Image input Text output
Author's Description

Fast-mode variant of [Opus 4.6](/anthropic/claude-opus-4.6) - identical capabilities with higher output speed at premium 6x pricing. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode

Key Specifications
Context
1M
Released
Apr 07, 2026
Supported Parameters

This model supports the following parameters:

Tools Structured Outputs Top P Response Format Temperature Stop Reasoning Include Reasoning Tool Choice Max Tokens
Features

This model supports the following features:

Structured Outputs Response Format Tools Reasoning
Model Pricing

Current Pricing

Feature Price (per 1M tokens)
Prompt $30
Completion $150
Input Cache Read $3
Input Cache Write $37.5
Web Search $10000

Price History

Available Endpoints
Provider Endpoint Name Context Length Pricing (Input) Pricing (Output)
Anthropic
Anthropic | anthropic/claude-4.6-opus-fast-20260407 1M $30 / 1M tokens $150 / 1M tokens
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