Claude Opus 5

Claude Opus 5 is Anthropic's advanced model for complex agentic coding and enterprise work, with a 1M-token context window, 128K maximum output, and adaptive thinking enabled by default.

Platform: Replicate

Language ModelCoding AssistantAgent WorkflowsAdaptive ThinkingLong ContextAnthropic

Claude API / Amazon Bedrock / Google Cloud / Microsoft Foundry

Claude API: $5 per million input tokens and $25 per million output tokens; separate prompt-caching, batch-processing, and Fast mode rates apply

Commercial

🚀Function Overview

Claude Opus 5 is Anthropic's current Opus recommendation for difficult everyday coding and enterprise workflows, priced the same as Opus 4.8 while improving long-horizon task completion, verification, review, and tool use.

Key Features

Official Claude API model ID claude-opus-5
1M-token context window as both the default and maximum
128K maximum output on the synchronous Messages API
Text and image input with text output
Adaptive thinking enabled by default with low, medium, high, xhigh, and max effort levels
Available through Claude API, Amazon Bedrock, Google Cloud, and Microsoft Foundry
Standard Claude API pricing of $5 per million input tokens and $25 per million output tokens
Fast mode research preview on the Claude API at premium pricing

Use Cases

•Complex multi-file coding features and large refactors
•Long-horizon agentic workflows with repeated tool use
•Difficult debugging, root-cause analysis, and high-precision code review
•Enterprise document, spreadsheet, presentation, and knowledge work
•Vision-assisted chart, document, diagram, and frontend analysis
•Migration testing from Claude Opus 4.8
•Task routing evaluations against Claude Fable 5 and Claude Sonnet 5

⚙️Input Parameters

model

string

Use claude-opus-5 for the official Claude API model ID.

messages

array

Anthropic Messages API conversation payload for text, image, coding, and tool-use workflows.

system

string

Optional system instruction for role, workflow, tool, output, and safety constraints.

max_tokens

integer

Maximum output tokens to generate, up to 128K on the synchronous Messages API.

effort

string

Adaptive thinking effort level: low, medium, high, xhigh, or max. The default is high.

thinking

object

Optional thinking configuration. Thinking is enabled by default; disabling it is allowed only with high effort or below.

tools

array

Optional tool definitions for agent workflows, code execution, file editing, search, and structured tool calls.

speed

string

Optional fast-mode request on supported Claude API accounts using the required research-preview beta header.

💡Usage Examples

Example 1

Input Parameters

{
  "model": "claude-opus-5",
  "messages": [
    {
      "role": "user",
      "content": "Trace this intermittent production bug across the repository, identify the root cause, implement the smallest safe fix, and verify the affected workflow."
    }
  ],
  "effort": "xhigh",
  "max_tokens": 8192
}

Output Results

Claude Opus 5 investigates the relevant code and runtime evidence, identifies the underlying failure mechanism, applies a focused change, and validates the behavior before reporting the result.

Example 2

Input Parameters

{
  "model": "claude-opus-5",
  "messages": [
    {
      "role": "user",
      "content": "Compare Opus 5 with Fable 5 for this long-running coding agent. Use our task success, latency, token use, and validation cost to recommend a default and escalation model."
    }
  ],
  "effort": "high",
  "max_tokens": 4096
}

Output Results

Claude Opus 5 structures the decision around measured task outcomes and total validated-task cost instead of treating one vendor benchmark as a universal ranking.

Quick Actions

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Technical Specifications

Hardware Type: Claude API / Amazon Bedrock / Google Cloud / Microsoft Foundry
Commercial Use: Supported
Pricing: Claude API: $5 per million input tokens and $25 per million output tokens; separate prompt-caching, batch-processing, and Fast mode rates apply
Platform: Replicate

Related Keywords

Claude Opus 5claude-opus-5Anthropic Opus 5Claude Opus 5 APIClaude Opus 5 pricingClaude Opus 5 context windowClaude Opus 5 vs Fable 5Claude Opus 4.8 migrationClaude Opus 5 coding model

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