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AnthropicText Chat

Claude Opus 4.8 AI Chat Playground and API

Try Claude Opus 4.8 online for agentic coding, difficult debugging, complex reasoning, and professional knowledge work with transparent token pricing.

Input 156 credits / 1M tokens · Output 776 credits / 1M tokens
Run with API
Claude Opus 4.8
claude-opus-4-8
Streaming
AIReiter
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Model details

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

Model ID
claude-opus-4-8
Provider
Anthropic
Protocol
OpenAI Chat Completions · Anthropic Messages · OpenAI Responses
max_tokens
4,096
Input tokens
156 credits / 1M
Output tokens
776 credits / 1M

What You Can Do with Claude Opus 4.8

Choose Claude Opus 4.8 for difficult coding, debugging, agent planning, and professional analysis that benefits from deliberate multi-step work.

Agentic Coding

Plan and execute multi-file coding work while keeping constraints and previous results in view.

Difficult Debugging

Trace failures across components, test hypotheses, and explain the most likely root cause.

Architecture Reasoning

Evaluate system boundaries, migration plans, and technical tradeoffs before implementation.

Professional Analysis

Work through detailed technical, operational, or knowledge-heavy questions with explicit reasoning.

Claude Opus 4.8 Use Cases

Best suited to senior engineering and knowledge workflows that need deliberate analysis rather than a fast generic answer.
01

Large Refactors

Reason about system-wide changes before editing individual files.

02

Root-Cause Analysis

Test competing explanations for difficult defects.

03

Technical Design Review

Challenge assumptions and compare architectural options.

04

Knowledge-Heavy Work

Analyze detailed source material and produce a professional response.

How to Use Claude Opus 4.8

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 4.8 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 4.8 FAQ

Common questions about the online playground, pricing, and API access.
What is Claude Opus 4.8 best for?

Evaluate it for agentic coding, difficult debugging, architecture reasoning, and professional knowledge work.

Is Claude Opus 4.8 useful for large refactors?

It is a strong candidate when a refactor requires system context, dependency analysis, and an explicit migration plan.

Should I use Opus 4.8 for simple chat?

Usually not. A lighter tier is more economical for short, routine, or latency-sensitive requests.

How is Claude Opus 4.8 priced?

Input and output token rates are shown above the playground.

Can I call Claude Opus 4.8 through an API?

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