Anthropic

Claude Opus 5 (Fast)

Claude Opus 5 (Fast) is a speed-optimized variant of Anthropic's most capable Opus model, offering the same 1M token context window and strong performance across agentic coding, professional knowledge work, and long-horizon reasoning with lower latency.

claude-opus-5-fast

Pricing

~52%

Input: $4.81784 / 1,000,000 tokens
Output: $24.0892 / 1,000,000 tokens
Cache read: $0.481784 / 1,000,000 tokens
Cache write: $6.0223 / 1,000,000 tokens

How pricing works

Discount history

51.8%Nov 8, 03:56 AM UTC

Nov 7, 11:57 PMNov 8, 03:56 AM UTC

Model details

Input: text, image, file
Output: text
Context window: 1,000,000 tokens
Maximum output: 128,000 tokens
Availability: $3.5KUncapped capacity
Updated: 11/8/2026, 3:58:06 AM UTC

Capacity is reserved when your request is accepted.

Capabilities

ChatStreamingWeb searchVisionTool callingReasoningJSON modeCode

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatstopstreamstream_optionsstructured_outputstool_choicetoolsverbosity