Claude Opus 5
Claude Opus 5 (anthropic/claude-opus-5) is a multimodal language model from Anthropic on the OceanToken API at $5.00 per 1M input tokens and $25.00 per 1M output tokens, with a 1M-token context window and reasoning, tool calling, structured outputs, image input.
Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work.
Create an account or sign in to OceanToken.Context window
1M tokens
Input
text + image + file
Output
text
BUILD WITH IT
- Multi-step reasoning
- Tool-using agents
- Structured outputs (JSON)
- Image understanding
Model ID anthropic/claude-opus-5
Base URL https://api.oceantoken.ai/v1
MAKE IT YOURS
One account. Your next idea.
- Input
- $5.00 / 1M tokens
- Output
- $25.00 / 1M tokens
- Cached input
- $0.50 / 1M tokens
- Cache write
- $6.25 / 1M tokens
Official price as of October 18, 2026. The console always shows the current price.
Open OceanToken ↗Specs, request sample and alternatives in the docs ↗Frequently asked questions
Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work.
Claude Opus 5 costs $5.00 per 1M input tokens and $25.00 per 1M output tokens. Cached input costs $0.50 per 1M tokens, and cache writes cost $6.25 per 1M tokens. These are official prices as of October 18, 2026, charged per use to your prepaid balance. The console always shows the current price.
Claude Opus 5 has a context window of 1M tokens (1,000,000 tokens).
Claude Opus 5 supports tool calling, structured outputs, image input (vision) and reasoning. It takes text, image and file input and returns text.
Send requests to https://api.oceantoken.ai/v1/chat/completions with the model ID anthropic/claude-opus-5 and your OceanToken API key. The API is OpenAI-compatible, so an OpenAI SDK needs only the base URL https://api.oceantoken.ai/v1 and your key. The Responses API and the Anthropic Messages API (/v1/messages) work too. The same OceanToken API key works for every model your account can use. Full reference: docs.oceantoken.ai.
OceanToken is prepaid. Open Credits in the console, choose an amount and pay by card on Stripe's hosted checkout page (Link works too; Alipay and WeChat Pay are not available). Each top-up is between $10 and $100,000, and your balance updates a few seconds after payment. Have a trial code? Redeem it on the same page.
Purchased credits are valid for 12 months from the date of purchase. Credits from trial codes, promotions or gifts may have a shorter validity. All purchases are final and non-refundable, except where the law requires a refund. Section 6 of the Terms of Service has the details.
Not if the request never ran: a request refused for an insufficient balance or by a safety check, or one whose provider fails before returning any output, is not charged. A video job that fails releases the amount it held. If a request breaks off after the model has started producing output, for example a stream cut off part-way, you pay for the tokens that were processed and generated for it.
There are two ways to buy. Pay-as-you-go is self-serve: sign up, add prepaid credits and use every model in the catalog at its official price. Enterprise customers get agreement pricing based on expected usage: email support@oceantoken.ai.