anthropic/claude-opus-5
1M context · $2.00 / M input tokens · $10.00 / M output tokens
Claude Opus 5 is Anthropic's flagship Opus model for deep reasoning, long-horizon agentic work, and complex software engineering that needs sustained focus across multi-step tasks.
Historical uptime data is collected over time. Current status reflects the latest health check.
Pricing
Pay-per-use
No upfront costs, pay only for what you use
API Usage
API Access Guide
Code examples
Use the OurToken API endpoint for this model. The examples below use direct HTTP requests and the recommended endpoint for the model family.
curl https://api.ourtoken.ai/v1/messages \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "claude-opus-5",
"messages": [
{
"role": "user",
"content": "Hello!"
}
],
"max_tokens": 256
}'Messages API Reference
Create a Claude Messages-compatible response through OurToken. This format uses a messages array, max_tokens, optional system prompts, tools, and thinking settings.
Authorization
| Content-Type | application/json |
| Authorization | Bearer YOUR_API_KEY |
Request Body
| Field | Type | Required | Description |
|---|---|---|---|
| model | string | Required | Model ID to call. |
| messages | array<object> | Required | Conversation messages sent to the model. |
| system | string | array<object> | Optional | Optional system prompt. |
| max_tokens | integer | Required | Maximum number of output tokens. |
| temperature | number | Optional | Sampling temperature. |
| top_p | number | Optional | Nucleus sampling parameter. |
| top_k | integer | Optional | Top-k sampling parameter. |
| stream | boolean | Optional | Whether to return a streaming response. |
| stop_sequences | array<string> | Optional | Sequences that stop generation. |
| tools | array<object> | Optional | Tools available to the model. |
| tool_choice | object | Optional | Controls how the model selects tools. |
| thinking | object | Optional | Thinking configuration for supported Claude models. |
| metadata | object | Optional | Optional request metadata. |
Response Body
| Field | Type | Required | Description |
|---|---|---|---|
| id | string | Required | Unique message identifier. |
| type | "message" | Required | Object type returned by the Messages API. |
| role | "assistant" | Required | Role of the returned message. |
| content | array<object> | Required | Array of content blocks returned by the model. |
| content[].text | string | Optional | Text inside a returned content block. |
| model | string | Required | Model that produced the response. |
| stop_reason | string | Optional | Reason generation stopped. |
| usage | object | Optional | Token usage information for the message. |
| usage.input_tokens | integer | Optional | Input token count. |
| usage.output_tokens | integer | Optional | Output token count. |
| usage.cache_creation_input_tokens | integer | Optional | Tokens written to prompt cache. |
| usage.cache_read_input_tokens | integer | Optional | Tokens read from prompt cache. |
Model Introduction
Anthropic claude-opus-5
Claude Opus 5 is Anthropic's flagship Opus model for deep reasoning, long-horizon agentic work, and complex software engineering that needs sustained focus across multi-step tasks.
Claude Opus 5 is a step-change improvement over Claude Opus 4.8, with the largest gains in deep reasoning, agentic and long-horizon tasks, and test-time compute scaling. It uses a 1M token context window with up to 128K output tokens, making it suitable for end-to-end software tasks, code review, visual analysis, and coordinating parallel subagents.
Why It Looks Great
- Anthropic's flagship Opus model for demanding reasoning, coding, and long-horizon agentic work.
- 1M token context window for large codebases, extended documents, and multi-step planning.
- Adaptive thinking with selectable effort levels for latency and token efficiency.
- Strong at end-to-end software tasks, code review, and coordinating parallel subagents.
- Accessible via the OurToken unified API at 40% of the standard Anthropic price.
Key Features
- Context Window: 1M tokens
- Max Output: 128K tokens
- Vision: Supported
- Function Calling: Supported
- Adaptive Thinking: Supported
- Input: Text, Image
- Output: Text
Specifications
Claude Opus 5 API Features for Developers
Use Claude Opus 5 API on OurToken for clear pricing, Claude Code Opus 5 workflows, Anthropic routing, and long-context agentic development.
API Access
Call Claude Opus 5 API through OurToken's unified endpoint while keeping a familiar integration path. Teams can compare provider behavior, token costs, and production readiness without maintaining separate Anthropic routing code for every evaluation environment.
Official Price Ratio
OurToken lists Claude Opus 5 at $2.00 input and $10.00 output per million tokens, based on the current project data. That gives teams 40% of official API pricing before scaling coding, research, or agent workloads.
Claude Code
Use Claude Code Opus 5 workflows for repository analysis, debugging, refactoring, and patch planning. Developers searching for claude code opus 5 can evaluate how Opus 5 handles multi-file context and review-heavy software tasks in production.
Anthropic Workflows
Route Anthropic Opus 5 requests through OurToken when your product needs frontier reasoning, tool-aware responses, and provider flexibility. Compare Claude Opus 5 against Claude Opus 4.8 and Claude Fable 5 in one API surface.
Context Handling
Use the project-defined 1M context window and 128K max output for long documents, code-heavy prompts, research notes, and extended task instructions. Keep model planning grounded in current OurToken data instead of unverified competitor limits.
Vision Tools
Send text and image inputs for document understanding, chart analysis, visual reasoning, and multimodal assistants. Claude Opus 5 API can also support function calling and structured output patterns when applications need predictable downstream automation paths.
How to Use Claude Opus 5 API on OurToken
Create an API key, choose Claude Opus 5 API, compare pricing, then test Claude Code and Anthropic agentic workflows.
Generate API Key
Create an OurToken API key and store it in a secure server-side environment variable. This gives your backend a stable credential for Claude Opus 5 API calls without exposing secrets in browser or client-side code.
01Select Model ID
Use claude-opus-5 as the model value when sending chat completions requests. Document the model ID clearly for developers comparing Claude Opus 5 API access, Anthropic providers, and production routing options across environments.
02Call Unified API
Send requests through OurToken's unified API endpoint with your OpenAI-compatible client. This keeps Claude Opus 5 Anthropic access, pricing review, and model comparison inside one integration instead of separate provider-specific code paths.
03Compare Pricing
Before scaling traffic, compare the OurToken price against official API pricing and expected token volume. Use the current $2.00 input and $10.00 output rates to estimate Claude Opus 5 API cost for real production workloads.
04Test Claude Code
Run representative Claude Code Opus 5 tasks such as code review, debugging, refactoring, patch planning, and repository-aware implementation. Include files, failing tests, coding conventions, and acceptance criteria so the model can reason over practical constraints.
05Validate Production Fit
Measure accuracy, latency, token usage, structured output behavior, and tool-call reliability before choosing a production route. Track whether Opus 5 agentic workflows reduce review cycles compared with smaller or cheaper models in practice.
06Claude Opus 5 FAQ
Answers about Claude Opus 5 API pricing, Claude Code workflows, Anthropic access, context limits, and comparison with Claude Fable 5.