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anthropicText Chat

Claude Opus 5 AI Chat Playground and API

Try Claude Opus 5 online for complex reasoning, demanding coding work, and multi-step analysis. Compare live token pricing and move the same model into your API workflow.

Input 300 credits / 1M tokens · Output 1,500 credits / 1M tokens
Run with API
Claude Opus 5
claude-opus-5
Streaming
AIReiter
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Model details

Use the same model key in Playground, API requests, and internal workflows.

Model ID
claude-opus-5
Provider
anthropic
Protocol
OpenAI Chat Completions · Anthropic Messages · OpenAI Responses
max_tokens
4,096
Input tokens
300 credits / 1M
Output tokens
1,500 credits / 1M

What You Can Do with Claude Opus 5

Choose Claude Opus 5 when the task needs sustained reasoning, careful decisions, and high-quality output across several dependent steps.

Complex Reasoning

Work through decisions with multiple constraints, competing evidence, and dependent steps.

Agent Planning

Draft plans, evaluate tool results, and maintain a clear objective across longer workflows.

High-Stakes Code Review

Inspect architecture, trace subtle failures, and propose changes with explicit tradeoffs.

Executive Synthesis

Turn dense technical or business material into defensible recommendations and action plans.

Claude Opus 5 Use Cases

Best suited to expensive mistakes, complex dependencies, and work where the quality of the final decision matters more than the shortest response time.
01

Architecture Decisions

Compare migration paths and surface risks before committing engineering time.

02

Complex Incident Analysis

Connect evidence across logs, code, and operational context.

03

Agent Orchestration

Plan and review workflows with multiple tools or dependent stages.

04

Strategic Research

Synthesize dense material into decisions that can be defended.

How to Use Claude Opus 5

Test the model in three straightforward steps.
01

Choose Your Settings

Set the response controls and upload options supported by the model.

02

Send a Prompt

Describe the task, add relevant context, and review the streamed response and token usage.

03

Connect the API

Use the documented endpoint and your API key to bring the same model into your product.

Build with the Claude Opus 5 API

Go from an interactive test to a production integration with predictable controls and usage reporting.

Familiar Protocols

Use the API protocol configured for this model, including streaming where available.

Usage Visibility

Track input tokens, output tokens, and consumed credits after each response.

Model-Specific Controls

Pass the supported generation parameters instead of relying on generic defaults.

One Account and Balance

Test and operate supported text models through the same AIReiter account and billing system.

Claude Opus 5 FAQ

Common questions about the online playground, pricing, and API access.
When should I choose Claude Opus 5?

Choose it for complex, multi-step work where reasoning quality and careful decisions justify a flagship model.

Is Claude Opus 5 suitable for coding agents?

Use the playground to test planning, code review, and tool-driven workflows against your own repository tasks.

How is Claude Opus 5 priced?

Input and output token rates are shown above the playground and should be checked before production routing.

Should every request use Claude Opus 5?

No. Route routine or latency-sensitive work to a lighter model and reserve Opus 5 for difficult requests.

Can I access Claude Opus 5 through an API?

Yes. Use the API documentation linked on this page and send the displayed model ID.