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Краткий вывод

  • Built for complex, long-horizon coding tasks and high-value engineering workflows.
  • Strong instruction adherence and consistency make it suitable for strict delivery requirements.
  • Supports vision understanding, tool calling, and streaming for practical multimodal pipelines.

Ключевые параметры

  • model | string | обяз. | claude-opus-5 | - | Model identifier for this page (for example claude-opus-5).
  • messages | object[] | обяз. | - | - | Conversation messages in chronological order; role support is user and assistant.
  • max_tokens | integer | обяз. | - | >=1 | Maximum output tokens.
  • system | string | object[] | опц. | - | - | Top-level system prompt (do not place it inside messages).
  • stream | boolean | опц. | false | - | Whether to enable SSE streaming output.
  • temperature | number | опц. | 1 | 0-1 | Sampling temperature controlling output randomness.
  • top_p | number | опц. | - | 0-1 | Nucleus sampling threshold; avoid aggressively tuning with temperature together.
  • stop_sequences | string[] | опц. | - | - | Stop sequences to end generation on matching substrings.
  • Authorization | HTTP Header | опц. | - | - | Bearer auth: Authorization: Bearer <YOUR_API_KEY>.
  • x-api-key | HTTP Header | опц. | - | - | API key auth (common in Anthropic SDK workflows), use either this or Authorization.
  • anthropic-version | HTTP Header | опц. | 2023-06-01 | - | Anthropic API version header; usually set automatically by Anthropic SDK.

Частые ошибки

  • 400 invalid_request_error: триггер=Missing fields, invalid messages schema, or mismatched parameter types.; исправление=Validate model, messages, and max_tokens fields and data types.; повтор=Retry only after fixing payload.
  • 401 authentication_error: триггер=Missing Authorization header, invalid format, or invalid key.; исправление=Verify bearer token format and key permissions.; повтор=Retry after auth is fixed.
  • 429 rate_limit_exceeded: триггер=Request rate, concurrency, or current quota hits upstream rate limiting.; исправление=Apply exponential backoff first, then review request rate, concurrency, and quota usage.; повтор=Use 1s/2s/4s backoff with jitter; if it persists, reduce submission pressure.

claude-opus-5

claude-opus-5 is a high-end Claude model for complex software engineering and multi-step reasoning workflows. This guide focuses on practical API integration patterns and production-oriented parameter usage. For model limits and release details, refer to official documentation.

Тип модели:
Цена: Input 300 кредитов/1M, Output 1,500 кредитов/1M
Type a message to test the model.

Прозрачные цены

claude-opus-5 pricing

Text usage is billed by actual token consumption. Final billing follows the current account quote.

Пополнить кредиты
Input 300 кредитов/1M, Output 1,500 кредитов/1M

Почему ToAPIs

Why call claude-opus-5 through ToAPIs?

Keep model access, API keys, billing, and usage management in one workflow.

Complex engineering problem solving

Well-suited for cross-module refactors, difficult debugging, and constrained code delivery tasks.

Long-running task consistency

Maintains stable execution across multi-step flows and checks key outcomes before completion.

High-fidelity instruction following

Handles strict system constraints and task requirements for low-tolerance production processes.

Connect in three steps

Create a key, send a compatible chat request, and monitor usage.

  1. 1

    Step 1

    Create an API key and set Authorization: Bearer <YOUR_API_KEY>.

  2. 2

    Step 2

    Send POST requests to /v1/messages with Content-Type: application/json.

  3. 3

    Step 3

    Include model, messages, and max_tokens at minimum; add system constraints for coding tasks.

When to use claude-opus-5

Use case 1

When you need complex architecture planning, cross-module refactoring, or difficult debugging support.

Use case 2

When long-running workflows require stable execution and consistency checks before output.

Use case 3

When your workflow combines code reasoning with image understanding or multimodal review tasks.

Частые вопросы

claude-opus-5 FAQ

What is claude-opus-5 best for in engineering workflows?

It is best for high-complexity, high-value tasks such as difficult coding problem solving, long-horizon refactors, and quality-sensitive delivery reviews.

What is the fastest API integration path?

Prepare an API key, authenticate with Authorization: Bearer, then POST to /v1/messages with model, messages, and max_tokens.

How should tool calling be integrated?

Pass tools with input_schema, execute returned tool_use calls, and send tool results back for the next completion turn.

How should streaming be handled?

Set stream=true and process SSE events incrementally, especially content_block_delta and final stop_reason handling.

claude-opus-5 API

Start building with claude-opus-5

Test a request here, then continue in the dashboard or API documentation.

Start for freeView API Docs

Try claude-opus-5 with one ToAPIs key.

Use the same account and API surface across supported text models.

Sign up to get free credits