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Claude Opus 4.8

Claude Opus 4.8 via Kilo Gateway

Specifications

Context Window

1,000,000 tokens

Release Date

2026-05-28

Capabilities

AttachmentsReasoningTool callingStructured outputTemperatureImage inputPdf input

Availability

Proprietary API

Model Overview

Kilo Gateway is a large-scale AI API aggregator providing access to hundreds of models from multiple providers through a single unified endpoint.

Claude Opus 4.8 is a claude-opus-family model by Kilo Gateway with a 1.0M token context window and up to 128k output tokens. It is priced at $5.00/1M input tokens and $25.00/1M output tokens.

Key capabilities include: attachments, reasoning, tool calling, structured output, temperature, image input, pdf input. It supports advanced reasoning for complex multi-step tasks. It can call external tools and functions for agentic workflows.

Details

ProviderKilo Gateway
Model IDanthropic/claude-opus-4.8
Familyclaude-opus
Release Date2026-05-28
Last Updated2026-05-28
Knowledge Cutoff2026-01
Context Window1,000,000 tokens
Max Output128,000 tokens
Input Cost / 1M$5.00
Output Cost / 1M$25.00
Cache Read / 1M$0.5000
Cache Write / 1M$6.25

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Frequently Asked Questions

How much does Claude Opus 4.8 cost to use?

Claude Opus 4.8 is priced at $5.00/1M input tokens and $25.00/1M output tokens. Use the cost estimator on this page to calculate your expected spend based on your usage pattern.

What is a token and how does it relate to pricing?

A token is a chunk of text — roughly ¾ of a word in English. For example, "chatbot" is two tokens. LLM API pricing is based on the number of tokens you send (input) and receive (output). Input tokens include your prompts, uploaded documents, and images, while output tokens are the model's generated responses.

Why are input and output tokens priced differently?

LLM providers charge separately for input and output tokens. Output tokens are typically more expensive because generating each token requires more compute — the model must run a full forward pass for every token it produces, while input tokens are processed in parallel.

What is the context window of Claude Opus 4.8?

Claude Opus 4.8 supports a context window of 1,000,000 tokens. This is the maximum number of tokens (input + output combined) the model can process in a single request. Larger context windows let you send longer documents or maintain longer conversation histories.

How accurate is this cost estimation?

This tool provides a ballpark estimate based on per-token pricing. Actual costs may differ due to prompt caching, batched API calls, volume discounts, reasoning token overhead, and provider-specific billing rules. Use it for budgeting and comparison, not as an invoice prediction.

How does Claude Opus 4.8 pricing compare to other models?

You can compare Claude Opus 4.8 with other models on our LLM API pricing calculator. Use the cost estimator to see side-by-side cost breakdowns across different providers and models to find the best fit for your budget and requirements.

What factors affect my total API cost?

Your total cost depends on several factors: the number of API calls you make, the length of your prompts (input tokens), the length of generated responses (output tokens), whether you use features like image or document uploads (which add input tokens), and any provider-specific charges for caching or batch processing.

How can my team use Claude Opus 4.8 via API?

You can connect your own Kilo Gateway API key and give your entire team access to Claude Opus 4.8 through TypingMind Teams. It lets you build a unified AI workspace where team members can use Claude Opus 4.8 and other models — without needing their own API keys. You stay in control of usage limits, costs, and permissions, all from a single dashboard.

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