Claude Opus 5

Anthropic · 1000K token context · text

Pricing: $4.56 per 1M input tokens, $22.81 per 1M output tokens

Claude Opus 5 is Anthropic's flagship model - the most capable in the Opus family. It supports long-horizon agentic work, complex multi-step coding, and memory-driven tasks where coherence over extended sessions matters. It features a 1M token context window, 128K max output tokens, adaptive thinking, and strong multimodal capabilities.

Pricing

$4.56 per 1M input tokens and $22.81 per 1M output tokens. Billing is per token: input tokens are charged at the input rate and output tokens at the output rate, from one llmka.dev balance.

Prices checked 2026-11-04

Context and limits

The context window is 1,000,000 tokens (1000K).

The maximum output is 128,000 tokens.

When to use Claude Opus 5

Claude Opus 5 (model ID `claude-opus-5`) takes text input and returns text output.

Supported features in the catalog: function calling (tools), streamed responses over SSE, JSON-schema structured output.

Use Claude Opus 5 for text generation and chat.

FAQ

How much does Claude Opus 5 cost?

$4.56 per 1M input tokens and $22.81 per 1M output tokens. Billing is per token: input tokens are charged at the input rate and output tokens at the output rate, from one llmka.dev balance.

What is the context window and output limit of Claude Opus 5?

The context window is 1,000,000 tokens (1000K). The maximum output is 128,000 tokens.

How do I get access to Claude Opus 5?

Create an API key in the llmka.dev dashboard and send requests to model "claude-opus-5" at https://api.llmka.dev/v1. The endpoint is OpenAI-compatible. One key and one balance cover all models on the gateway.

Links

All models and prices · API documentation · Quick start

Available through the llmka.dev gateway: OpenAI- and Anthropic-compatible endpoints, one key, USDT top-up.